--- DOAJ_listed: '1' OA_place: publisher OA_type: gold _id: '21640' abstract: - lang: eng text: "Conventional computing architectures have no known efficient algorithms for combinatorial optimization tasks such\r\nas the Ising problem, which requires finding the ground state spin configuration of an arbitrary Ising graph. Physical\r\nIsing machines have recently been developed as an alternative to conventional exact and heuristic solvers; however,\r\nthese machines typically suffer from decreased ground state convergence probability or universality for high edge-\r\ndensity graphs or arbitrary graph weights, respectively. We experimentally demonstrate a proof-of-principle integrated\r\nnanophotonic recurrent Ising sampler (INPRIS), using a hybrid scheme combining electronics and silicon-on-insulator\r\nphotonics, that is capable of converging to the ground state of various four-spin graphs with high probability. The\r\nINPRIS results indicate that noise may be used as a resource to speed up the ground state search and to explore larger\r\nregions of the phase space, thus allowing one to probe noise-dependent physical observables. Since the recurrent pho-\r\ntonic transformation that our machine imparts is a fixed function of the graph problem and therefore compatible with\r\noptoelectronic architectures that support GHz clock rates (such as passive or non-volatile photonic circuits that do not\r\nrequire reprogramming at each iteration), this work suggests the potential for future systems that could achieve orders-\r\nof-magnitude speedups in exploring the solution space of combinatorially hard problems. " article_processing_charge: No article_type: original author: - first_name: Mihika full_name: Prabhu, Mihika last_name: Prabhu - first_name: Charles full_name: Roques-Carmes, Charles id: e2e68fc9-6505-11ef-a541-eb4e72cc3e82 last_name: Roques-Carmes - first_name: Yichen full_name: Shen, Yichen last_name: Shen - first_name: Nicholas full_name: Harris, Nicholas last_name: Harris - first_name: Li full_name: Jing, Li last_name: Jing - first_name: Jacques full_name: Carolan, Jacques last_name: Carolan - first_name: Ryan full_name: Hamerly, Ryan last_name: Hamerly - first_name: Tom full_name: Baehr-Jones, Tom last_name: Baehr-Jones - first_name: Michael full_name: Hochberg, Michael last_name: Hochberg - first_name: Vladimir full_name: Čeperić, Vladimir last_name: Čeperić - first_name: John D. full_name: Joannopoulos, John D. last_name: Joannopoulos - first_name: Dirk R. full_name: Englund, Dirk R. last_name: Englund - first_name: Marin full_name: Soljačić, Marin last_name: Soljačić citation: ama: Prabhu M, Roques-Carmes C, Shen Y, et al. Accelerating recurrent Ising machines in photonic integrated circuits. Optica. 2020;7(5):551-558. doi:10.1364/optica.386613 apa: Prabhu, M., Roques-Carmes, C., Shen, Y., Harris, N., Jing, L., Carolan, J., … Soljačić, M. (2020). Accelerating recurrent Ising machines in photonic integrated circuits. Optica. Optica Publishing Group. https://doi.org/10.1364/optica.386613 chicago: Prabhu, Mihika, Charles Roques-Carmes, Yichen Shen, Nicholas Harris, Li Jing, Jacques Carolan, Ryan Hamerly, et al. “Accelerating Recurrent Ising Machines in Photonic Integrated Circuits.” Optica. Optica Publishing Group, 2020. https://doi.org/10.1364/optica.386613. ieee: M. Prabhu et al., “Accelerating recurrent Ising machines in photonic integrated circuits,” Optica, vol. 7, no. 5. Optica Publishing Group, pp. 551–558, 2020. ista: Prabhu M, Roques-Carmes C, Shen Y, Harris N, Jing L, Carolan J, Hamerly R, Baehr-Jones T, Hochberg M, Čeperić V, Joannopoulos JD, Englund DR, Soljačić M. 2020. Accelerating recurrent Ising machines in photonic integrated circuits. Optica. 7(5), 551–558. mla: Prabhu, Mihika, et al. “Accelerating Recurrent Ising Machines in Photonic Integrated Circuits.” Optica, vol. 7, no. 5, Optica Publishing Group, 2020, pp. 551–58, doi:10.1364/optica.386613. short: M. Prabhu, C. Roques-Carmes, Y. Shen, N. Harris, L. Jing, J. Carolan, R. Hamerly, T. Baehr-Jones, M. Hochberg, V. Čeperić, J.D. Joannopoulos, D.R. Englund, M. Soljačić, Optica 7 (2020) 551–558. date_created: 2026-03-30T12:22:48Z date_published: 2020-05-18T00:00:00Z date_updated: 2026-04-27T07:06:04Z day: '18' ddc: - '530' doi: 10.1364/optica.386613 extern: '1' intvolume: ' 7' issue: '5' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1364/OPTICA.386613 month: '05' oa: 1 oa_version: Published Version page: 551-558 publication: Optica publication_identifier: eissn: - 2334-2536 publication_status: published publisher: Optica Publishing Group quality_controlled: '1' scopus_import: '1' status: public title: Accelerating recurrent Ising machines in photonic integrated circuits tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 7 year: '2020' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold _id: '21642' abstract: - lang: eng text: 'By codesigning a metaoptical front end in conjunction with an image‐processing back end, we demonstrate noise sensitivity and compactness substantially superior to either an optics‐only or a computation‐only approach, illustrated by two examples: subwavelength imaging and reconstruction of the full polarization coherence matrices of multiple light sources. Our end‐to‐end inverse designs couple the solution of the full Maxwell equations—exploiting all aspects of wave physics arising in subwavelength scatterers—with inverse‐scattering algorithms in a single large‐scale optimization involving degrees of freedom. The resulting structures scatter light in a way that is radically different from either a conventional lens or a random microstructure, and suppress the noise sensitivity of the inverse‐scattering computation by several orders of magnitude. Incorporating the full wave physics is especially crucial for detecting spectral and polarization information that is discarded by geometric optics and scalar diffraction theory.' article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Zin full_name: Lin, Zin last_name: Lin - first_name: Charles full_name: Roques-Carmes, Charles id: e2e68fc9-6505-11ef-a541-eb4e72cc3e82 last_name: Roques-Carmes - first_name: Raphaël full_name: Pestourie, Raphaël last_name: Pestourie - first_name: Marin full_name: Soljačić, Marin last_name: Soljačić - first_name: Arka full_name: Majumdar, Arka last_name: Majumdar - first_name: Steven G. full_name: Johnson, Steven G. last_name: Johnson citation: ama: Lin Z, Roques-Carmes C, Pestourie R, Soljačić M, Majumdar A, Johnson SG. End‐to‐end nanophotonic inverse design for imaging and polarimetry. Nanophotonics. 2020;10(3):1177-1187. doi:10.1515/nanoph-2020-0579 apa: Lin, Z., Roques-Carmes, C., Pestourie, R., Soljačić, M., Majumdar, A., & Johnson, S. G. (2020). End‐to‐end nanophotonic inverse design for imaging and polarimetry. Nanophotonics. Wiley. https://doi.org/10.1515/nanoph-2020-0579 chicago: Lin, Zin, Charles Roques-Carmes, Raphaël Pestourie, Marin Soljačić, Arka Majumdar, and Steven G. Johnson. “End‐to‐end Nanophotonic Inverse Design for Imaging and Polarimetry.” Nanophotonics. Wiley, 2020. https://doi.org/10.1515/nanoph-2020-0579. ieee: Z. Lin, C. Roques-Carmes, R. Pestourie, M. Soljačić, A. Majumdar, and S. G. Johnson, “End‐to‐end nanophotonic inverse design for imaging and polarimetry,” Nanophotonics, vol. 10, no. 3. Wiley, pp. 1177–1187, 2020. ista: Lin Z, Roques-Carmes C, Pestourie R, Soljačić M, Majumdar A, Johnson SG. 2020. End‐to‐end nanophotonic inverse design for imaging and polarimetry. Nanophotonics. 10(3), 1177–1187. mla: Lin, Zin, et al. “End‐to‐end Nanophotonic Inverse Design for Imaging and Polarimetry.” Nanophotonics, vol. 10, no. 3, Wiley, 2020, pp. 1177–87, doi:10.1515/nanoph-2020-0579. short: Z. Lin, C. Roques-Carmes, R. Pestourie, M. Soljačić, A. Majumdar, S.G. Johnson, Nanophotonics 10 (2020) 1177–1187. date_created: 2026-03-30T12:22:48Z date_published: 2020-12-23T00:00:00Z date_updated: 2026-04-27T09:29:25Z day: '23' ddc: - '530' doi: 10.1515/nanoph-2020-0579 extern: '1' external_id: arxiv: - '2006.09145' intvolume: ' 10' issue: '3' keyword: - computational imaging - end-to-end photonic inverse design - inverse scattering - meta-optics - polarimetry language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1515/nanoph-2020-0579 month: '12' oa: 1 oa_version: Published Version page: 1177-1187 publication: Nanophotonics publication_identifier: eissn: - 2192-8614 issn: - 2192-8614 publication_status: published publisher: Wiley quality_controlled: '1' scopus_import: '1' status: public title: End‐to‐end nanophotonic inverse design for imaging and polarimetry tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd volume: 10 year: '2020' ... --- _id: '13361' abstract: - lang: eng text: "In nature, light is harvested by photoactive proteins to drive a range of biological processes, including photosynthesis, phototaxis, vision, and ultimately life. Bacteriorhodopsin, for example, is a protein embedded within archaeal cell membranes that binds the chromophore retinal within its hydrophobic pocket. Exposure to light triggers regioselective photoisomerization of the confined retinal, which in turn initiates a cascade of conformational changes within the protein, triggering proton flux against the concentration gradient, providing the microorganisms with the energy to live. We are inspired by these functions in nature to harness light energy using synthetic photoswitches under confinement. Like retinal, synthetic photoswitches require some degree of conformational flexibility to isomerize. In nature, the conformational change associated with retinal isomerization is accommodated by the structural flexibility of the opsin host, yet it results in steric communication between the chromophore and the protein. Similarly, we strive to design systems wherein isomerization of confined photoswitches results in steric communication between a photoswitch and its confining environment. To achieve this aim, a balance must be struck between molecular crowding and conformational freedom under confinement: too much crowding prevents switching, whereas too much freedom resembles switching of isolated molecules in solution, preventing communication.\r\n\r\nIn this Account, we discuss five classes of synthetic light-switchable compounds—diarylethenes, anthracenes, azobenzenes, spiropyrans, and donor–acceptor Stenhouse adducts—comparing their behaviors under confinement and in solution. The environments employed to confine these photoswitches are diverse, ranging from planar surfaces to nanosized cavities within coordination cages, nanoporous frameworks, and nanoparticle aggregates. The trends that emerge are primarily dependent on the nature of the photoswitch and not on the material used for confinement. In general, we find that photoswitches requiring less conformational freedom for switching are, as expected, more straightforward to isomerize reversibly under confinement. Because these compounds undergo only small structural changes upon isomerization, however, switching does not propagate into communication with their environment. Conversely, photoswitches that require more conformational freedom are more challenging to switch under confinement but also can influence system-wide behavior.\r\n\r\nAlthough we are primarily interested in the effects of geometric constraints on photoswitching under confinement, additional effects inevitably emerge when a compound is removed from solution and placed within a new, more crowded environment. For instance, we have found that compounds that convert to zwitterionic isomers upon light irradiation often experience stabilization of these forms under confinement. This effect results from the mutual stabilization of zwitterions that are brought into close proximity on surfaces or within cavities. Furthermore, photoswitches can experience preorganization under confinement, influencing the selectivity and efficiency of their photoreactions. Because intermolecular interactions arising from confinement cannot be considered independently from the effects of geometric constraints, we describe all confinement effects concurrently throughout this Account." article_processing_charge: No article_type: original author: - first_name: Angela B. full_name: Grommet, Angela B. last_name: Grommet - first_name: Lucia M. full_name: Lee, Lucia M. last_name: Lee - first_name: Rafal full_name: Klajn, Rafal id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b last_name: Klajn citation: ama: Grommet AB, Lee LM, Klajn R. Molecular photoswitching in confined spaces. Accounts of Chemical Research. 2020;53(11):2600-2610. doi:10.1021/acs.accounts.0c00434 apa: Grommet, A. B., Lee, L. M., & Klajn, R. (2020). Molecular photoswitching in confined spaces. Accounts of Chemical Research. American Chemical Society. https://doi.org/10.1021/acs.accounts.0c00434 chicago: Grommet, Angela B., Lucia M. Lee, and Rafal Klajn. “Molecular Photoswitching in Confined Spaces.” Accounts of Chemical Research. American Chemical Society, 2020. https://doi.org/10.1021/acs.accounts.0c00434. ieee: A. B. Grommet, L. M. Lee, and R. Klajn, “Molecular photoswitching in confined spaces,” Accounts of Chemical Research, vol. 53, no. 11. American Chemical Society, pp. 2600–2610, 2020. ista: Grommet AB, Lee LM, Klajn R. 2020. Molecular photoswitching in confined spaces. Accounts of Chemical Research. 53(11), 2600–2610. mla: Grommet, Angela B., et al. “Molecular Photoswitching in Confined Spaces.” Accounts of Chemical Research, vol. 53, no. 11, American Chemical Society, 2020, pp. 2600–10, doi:10.1021/acs.accounts.0c00434. short: A.B. Grommet, L.M. Lee, R. Klajn, Accounts of Chemical Research 53 (2020) 2600–2610. date_created: 2023-08-01T09:35:50Z date_published: 2020-11-17T00:00:00Z date_updated: 2024-10-14T12:12:31Z day: '17' doi: 10.1021/acs.accounts.0c00434 extern: '1' external_id: pmid: - '32969638' intvolume: ' 53' issue: '11' keyword: - General Medicine - General Chemistry language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1021/acs.accounts.0c00434 month: '11' oa: 1 oa_version: Published Version page: 2600-2610 pmid: 1 publication: Accounts of Chemical Research publication_identifier: eissn: - 1520-4898 issn: - 0001-4842 publication_status: published publisher: American Chemical Society quality_controlled: '1' scopus_import: '1' status: public title: Molecular photoswitching in confined spaces type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 53 year: '2020' ... --- _id: '13362' abstract: - lang: eng text: Aggregation of organic molecules can drastically affect their physicochemical properties. For instance, the optical properties of BODIPY dyes are inherently related to the degree of aggregation and the mutual orientation of BODIPY units within these aggregates. Whereas the noncovalent aggregation of various BODIPY dyes has been studied in diverse media, the ill-defined nature of these aggregates has made it difficult to elucidate the structure–property relationships. Here, we studied the encapsulation of three structurally simple BODIPY derivatives within the hydrophobic cavity of a water-soluble, flexible PdII6L4 coordination cage. The cavity size allowed for the selective encapsulation of two dye molecules, irrespective of the substitution pattern on the BODIPY core. Working with a model, a pentamethyl-substituted derivative, we found that the mutual orientation of two BODIPY units in the cage’s cavity was remarkably similar to that in the crystalline state of the free dye, allowing us to isolate and characterize the smallest possible noncovalent H-type BODIPY aggregate, namely, an H-dimer. Interestingly, a CF3-substituted BODIPY, known for forming J-type aggregates, was also encapsulated as an H-dimer. Taking advantage of the dynamic nature of encapsulation, we developed a system in which reversible switching between H- and J-aggregates can be induced for multiple cycles simply by addition and subsequent destruction of the cage. We expect that the ability to rapidly and reversibly manipulate the optical properties of supramolecular inclusion complexes in aqueous media will open up avenues for developing detection systems that operate within biological environments. article_processing_charge: No article_type: original author: - first_name: Julius full_name: Gemen, Julius last_name: Gemen - first_name: Johannes full_name: Ahrens, Johannes last_name: Ahrens - first_name: Linda J. W. full_name: Shimon, Linda J. W. last_name: Shimon - first_name: Rafal full_name: Klajn, Rafal id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b last_name: Klajn citation: ama: Gemen J, Ahrens J, Shimon LJW, Klajn R. Modulating the optical properties of BODIPY dyes by noncovalent dimerization within a flexible coordination cage. Journal of the American Chemical Society. 2020;142(41):17721-17729. doi:10.1021/jacs.0c08589 apa: Gemen, J., Ahrens, J., Shimon, L. J. W., & Klajn, R. (2020). Modulating the optical properties of BODIPY dyes by noncovalent dimerization within a flexible coordination cage. Journal of the American Chemical Society. American Chemical Society. https://doi.org/10.1021/jacs.0c08589 chicago: Gemen, Julius, Johannes Ahrens, Linda J. W. Shimon, and Rafal Klajn. “Modulating the Optical Properties of BODIPY Dyes by Noncovalent Dimerization within a Flexible Coordination Cage.” Journal of the American Chemical Society. American Chemical Society, 2020. https://doi.org/10.1021/jacs.0c08589. ieee: J. Gemen, J. Ahrens, L. J. W. Shimon, and R. Klajn, “Modulating the optical properties of BODIPY dyes by noncovalent dimerization within a flexible coordination cage,” Journal of the American Chemical Society, vol. 142, no. 41. American Chemical Society, pp. 17721–17729, 2020. ista: Gemen J, Ahrens J, Shimon LJW, Klajn R. 2020. Modulating the optical properties of BODIPY dyes by noncovalent dimerization within a flexible coordination cage. Journal of the American Chemical Society. 142(41), 17721–17729. mla: Gemen, Julius, et al. “Modulating the Optical Properties of BODIPY Dyes by Noncovalent Dimerization within a Flexible Coordination Cage.” Journal of the American Chemical Society, vol. 142, no. 41, American Chemical Society, 2020, pp. 17721–29, doi:10.1021/jacs.0c08589. short: J. Gemen, J. Ahrens, L.J.W. Shimon, R. Klajn, Journal of the American Chemical Society 142 (2020) 17721–17729. date_created: 2023-08-01T09:36:10Z date_published: 2020-10-04T00:00:00Z date_updated: 2024-10-14T12:12:41Z day: '04' doi: 10.1021/jacs.0c08589 extern: '1' external_id: pmid: - '33006898' intvolume: ' 142' issue: '41' keyword: - Colloid and Surface Chemistry - Biochemistry - General Chemistry - Catalysis language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1021/jacs.0c08589 month: '10' oa: 1 oa_version: Published Version page: 17721-17729 pmid: 1 publication: Journal of the American Chemical Society publication_identifier: eissn: - 1520-5126 issn: - 0002-7863 publication_status: published publisher: American Chemical Society quality_controlled: '1' scopus_import: '1' status: public title: Modulating the optical properties of BODIPY dyes by noncovalent dimerization within a flexible coordination cage type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 142 year: '2020' ... --- _id: '13363' abstract: - lang: eng text: Temporal activation of biological processes by visible light and subsequent return to an inactive state in the absence of light is an essential characteristic of photoreceptor cells. Inspired by these phenomena, light-responsive materials are very attractive due to the high spatiotemporal control of light irradiation, with light being able to precisely orchestrate processes repeatedly over many cycles. Herein, it is reported that light-driven proton transfer triggered by a merocyanine-based photoacid can be used to modulate the permeability of pH-responsive polymersomes through cyclic, temporally controlled protonation and deprotonation of the polymersome membrane. The membranes can undergo repeated light-driven swelling–contraction cycles without losing functional effectiveness. When applied to enzyme loaded-nanoreactors, this membrane responsiveness is used for the reversible control of enzymatic reactions. This combination of the merocyanine-based photoacid and pH-switchable nanoreactors results in rapidly responding and versatile supramolecular systems successfully used to switch enzymatic reactions ON and OFF on demand. article_number: '2002135' article_processing_charge: No article_type: original author: - first_name: Silvia full_name: Moreno, Silvia last_name: Moreno - first_name: Priyanka full_name: Sharan, Priyanka last_name: Sharan - first_name: Johanna full_name: Engelke, Johanna last_name: Engelke - first_name: Hannes full_name: Gumz, Hannes last_name: Gumz - first_name: Susanne full_name: Boye, Susanne last_name: Boye - first_name: Ulrich full_name: Oertel, Ulrich last_name: Oertel - first_name: Peng full_name: Wang, Peng last_name: Wang - first_name: Susanta full_name: Banerjee, Susanta last_name: Banerjee - first_name: Rafal full_name: Klajn, Rafal id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b last_name: Klajn - first_name: Brigitte full_name: Voit, Brigitte last_name: Voit - first_name: Albena full_name: Lederer, Albena last_name: Lederer - first_name: Dietmar full_name: Appelhans, Dietmar last_name: Appelhans citation: ama: Moreno S, Sharan P, Engelke J, et al. Light‐driven proton transfer for cyclic and temporal switching of enzymatic nanoreactors. Small. 2020;16(37). doi:10.1002/smll.202002135 apa: Moreno, S., Sharan, P., Engelke, J., Gumz, H., Boye, S., Oertel, U., … Appelhans, D. (2020). Light‐driven proton transfer for cyclic and temporal switching of enzymatic nanoreactors. Small. Wiley. https://doi.org/10.1002/smll.202002135 chicago: Moreno, Silvia, Priyanka Sharan, Johanna Engelke, Hannes Gumz, Susanne Boye, Ulrich Oertel, Peng Wang, et al. “Light‐driven Proton Transfer for Cyclic and Temporal Switching of Enzymatic Nanoreactors.” Small. Wiley, 2020. https://doi.org/10.1002/smll.202002135. ieee: S. Moreno et al., “Light‐driven proton transfer for cyclic and temporal switching of enzymatic nanoreactors,” Small, vol. 16, no. 37. Wiley, 2020. ista: Moreno S, Sharan P, Engelke J, Gumz H, Boye S, Oertel U, Wang P, Banerjee S, Klajn R, Voit B, Lederer A, Appelhans D. 2020. Light‐driven proton transfer for cyclic and temporal switching of enzymatic nanoreactors. Small. 16(37), 2002135. mla: Moreno, Silvia, et al. “Light‐driven Proton Transfer for Cyclic and Temporal Switching of Enzymatic Nanoreactors.” Small, vol. 16, no. 37, 2002135, Wiley, 2020, doi:10.1002/smll.202002135. short: S. Moreno, P. Sharan, J. Engelke, H. Gumz, S. Boye, U. Oertel, P. Wang, S. Banerjee, R. Klajn, B. Voit, A. Lederer, D. Appelhans, Small 16 (2020). date_created: 2023-08-01T09:36:48Z date_published: 2020-08-11T00:00:00Z date_updated: 2023-08-07T10:11:41Z day: '11' doi: 10.1002/smll.202002135 extern: '1' external_id: pmid: - '32783385' intvolume: ' 16' issue: '37' keyword: - Biomaterials - Biotechnology - General Materials Science - General Chemistry language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1002/smll.202002135 month: '08' oa: 1 oa_version: Published Version pmid: 1 publication: Small publication_identifier: eissn: - 1613-6829 issn: - 1613-6810 publication_status: published publisher: Wiley quality_controlled: '1' scopus_import: '1' status: public title: Light‐driven proton transfer for cyclic and temporal switching of enzymatic nanoreactors type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 16 year: '2020' ... --- _id: '13364' abstract: - lang: eng text: Photochromic molecules undergo reversible isomerization upon irradiation with light at different wavelengths, a process that can alter their physical and chemical properties. For instance, dihydropyrene (DHP) is a deep-colored compound that isomerizes to light-brown cyclophanediene (CPD) upon irradiation with visible light. CPD can then isomerize back to DHP upon irradiation with UV light or thermally in the dark. Conversion between DHP and CPD is thought to proceed via a biradical intermediate; bimolecular events involving this unstable intermediate thus result in rapid decomposition and poor cycling performance. Here, we show that the reversible isomerization of DHP can be stabilized upon confinement within a PdII6L4 coordination cage. By protecting this reactive intermediate using the cage, each isomerization reaction proceeds to higher yield, which significantly decreases the fatigue experienced by the system upon repeated photocycling. Although molecular confinement is known to help stabilize reactive species, this effect is not typically employed to protect reactive intermediates and thus improve reaction yields. We envisage that performing reactions under confinement will not only improve the cyclic performance of photochromic molecules, but may also increase the amount of product obtainable from traditionally low-yielding organic reactions. article_processing_charge: No article_type: original author: - first_name: Martina full_name: Canton, Martina last_name: Canton - first_name: Angela B. full_name: Grommet, Angela B. last_name: Grommet - first_name: Luca full_name: Pesce, Luca last_name: Pesce - first_name: Julius full_name: Gemen, Julius last_name: Gemen - first_name: Shiming full_name: Li, Shiming last_name: Li - first_name: Yael full_name: Diskin-Posner, Yael last_name: Diskin-Posner - first_name: Alberto full_name: Credi, Alberto last_name: Credi - first_name: Giovanni M. full_name: Pavan, Giovanni M. last_name: Pavan - first_name: Joakim full_name: Andréasson, Joakim last_name: Andréasson - first_name: Rafal full_name: Klajn, Rafal id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b last_name: Klajn citation: ama: Canton M, Grommet AB, Pesce L, et al. Improving fatigue resistance of dihydropyrene by encapsulation within a coordination cage. Journal of the American Chemical Society. 2020;142(34):14557-14565. doi:10.1021/jacs.0c06146 apa: Canton, M., Grommet, A. B., Pesce, L., Gemen, J., Li, S., Diskin-Posner, Y., … Klajn, R. (2020). Improving fatigue resistance of dihydropyrene by encapsulation within a coordination cage. Journal of the American Chemical Society. American Chemical Society. https://doi.org/10.1021/jacs.0c06146 chicago: Canton, Martina, Angela B. Grommet, Luca Pesce, Julius Gemen, Shiming Li, Yael Diskin-Posner, Alberto Credi, Giovanni M. Pavan, Joakim Andréasson, and Rafal Klajn. “Improving Fatigue Resistance of Dihydropyrene by Encapsulation within a Coordination Cage.” Journal of the American Chemical Society. American Chemical Society, 2020. https://doi.org/10.1021/jacs.0c06146. ieee: M. Canton et al., “Improving fatigue resistance of dihydropyrene by encapsulation within a coordination cage,” Journal of the American Chemical Society, vol. 142, no. 34. American Chemical Society, pp. 14557–14565, 2020. ista: Canton M, Grommet AB, Pesce L, Gemen J, Li S, Diskin-Posner Y, Credi A, Pavan GM, Andréasson J, Klajn R. 2020. Improving fatigue resistance of dihydropyrene by encapsulation within a coordination cage. Journal of the American Chemical Society. 142(34), 14557–14565. mla: Canton, Martina, et al. “Improving Fatigue Resistance of Dihydropyrene by Encapsulation within a Coordination Cage.” Journal of the American Chemical Society, vol. 142, no. 34, American Chemical Society, 2020, pp. 14557–65, doi:10.1021/jacs.0c06146. short: M. Canton, A.B. Grommet, L. Pesce, J. Gemen, S. Li, Y. Diskin-Posner, A. Credi, G.M. Pavan, J. Andréasson, R. Klajn, Journal of the American Chemical Society 142 (2020) 14557–14565. date_created: 2023-08-01T09:36:59Z date_published: 2020-08-14T00:00:00Z date_updated: 2023-08-07T10:15:38Z day: '14' doi: 10.1021/jacs.0c06146 extern: '1' external_id: pmid: - '32791832' intvolume: ' 142' issue: '34' keyword: - Colloid and Surface Chemistry - Biochemistry - General Chemistry - Catalysis language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1021/jacs.0c06146 month: '08' oa: 1 oa_version: Published Version page: 14557-14565 pmid: 1 publication: Journal of the American Chemical Society publication_identifier: eissn: - 1520-5126 issn: - 0002-7863 publication_status: published publisher: American Chemical Society quality_controlled: '1' scopus_import: '1' status: public title: Improving fatigue resistance of dihydropyrene by encapsulation within a coordination cage type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 142 year: '2020' ... --- _id: '13365' abstract: - lang: eng text: Photoswitchable molecules are employed for many applications, from the development of active materials to the design of stimuli-responsive molecular systems and light-powered molecular machines. To fully exploit their potential, we must learn ways to control the mechanism and kinetics of their photoinduced isomerization. One possible strategy involves confinement of photoresponsive switches such as azobenzenes or spiropyrans within crowded molecular environments, which may allow control over their light-induced conversion. However, the molecular factors that influence and control the switching process under realistic conditions and within dynamic molecular regimes often remain difficult to ascertain. As a case study, here we have employed molecular models to probe the isomerization of azobenzene guests within a Pd(II)-based coordination cage host in water. Atomistic molecular dynamics and metadynamics simulations allow us to characterize the flexibility of the cage in the solvent, the (rare) guest encapsulation and release events, and the relative probability/kinetics of light-induced isomerization of azobenzene analogues in these host–guest systems. In this way, we can reconstruct the mechanism of azobenzene switching inside the cage cavity and explore key molecular factors that may control this event. We obtain a molecular-level insight on the effects of crowding and host–guest interactions on azobenzene isomerization. The detailed picture elucidated by this study may enable the rational design of photoswitchable systems whose reactivity can be controlled via host–guest interactions. article_processing_charge: No article_type: original author: - first_name: Luca full_name: Pesce, Luca last_name: Pesce - first_name: Claudio full_name: Perego, Claudio last_name: Perego - first_name: Angela B. full_name: Grommet, Angela B. last_name: Grommet - first_name: Rafal full_name: Klajn, Rafal id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b last_name: Klajn - first_name: Giovanni M. full_name: Pavan, Giovanni M. last_name: Pavan citation: ama: Pesce L, Perego C, Grommet AB, Klajn R, Pavan GM. Molecular factors controlling the isomerization of Azobenzenes in the cavity of a flexible coordination cage. Journal of the American Chemical Society. 2020;142(21):9792-9802. doi:10.1021/jacs.0c03444 apa: Pesce, L., Perego, C., Grommet, A. B., Klajn, R., & Pavan, G. M. (2020). Molecular factors controlling the isomerization of Azobenzenes in the cavity of a flexible coordination cage. Journal of the American Chemical Society. American Chemical Society. https://doi.org/10.1021/jacs.0c03444 chicago: Pesce, Luca, Claudio Perego, Angela B. Grommet, Rafal Klajn, and Giovanni M. Pavan. “Molecular Factors Controlling the Isomerization of Azobenzenes in the Cavity of a Flexible Coordination Cage.” Journal of the American Chemical Society. American Chemical Society, 2020. https://doi.org/10.1021/jacs.0c03444. ieee: L. Pesce, C. Perego, A. B. Grommet, R. Klajn, and G. M. Pavan, “Molecular factors controlling the isomerization of Azobenzenes in the cavity of a flexible coordination cage,” Journal of the American Chemical Society, vol. 142, no. 21. American Chemical Society, pp. 9792–9802, 2020. ista: Pesce L, Perego C, Grommet AB, Klajn R, Pavan GM. 2020. Molecular factors controlling the isomerization of Azobenzenes in the cavity of a flexible coordination cage. Journal of the American Chemical Society. 142(21), 9792–9802. mla: Pesce, Luca, et al. “Molecular Factors Controlling the Isomerization of Azobenzenes in the Cavity of a Flexible Coordination Cage.” Journal of the American Chemical Society, vol. 142, no. 21, American Chemical Society, 2020, pp. 9792–802, doi:10.1021/jacs.0c03444. short: L. Pesce, C. Perego, A.B. Grommet, R. Klajn, G.M. Pavan, Journal of the American Chemical Society 142 (2020) 9792–9802. date_created: 2023-08-01T09:37:12Z date_published: 2020-04-30T00:00:00Z date_updated: 2023-08-07T10:18:53Z day: '30' doi: 10.1021/jacs.0c03444 extern: '1' external_id: pmid: - '32353237' intvolume: ' 142' issue: '21' keyword: - Colloid and Surface Chemistry - Biochemistry - General Chemistry - Catalysis language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1021/jacs.0c03444 month: '04' oa: 1 oa_version: Published Version page: 9792-9802 pmid: 1 publication: Journal of the American Chemical Society publication_identifier: eissn: - 1520-5126 issn: - 0002-7863 publication_status: published publisher: American Chemical Society quality_controlled: '1' scopus_import: '1' status: public title: Molecular factors controlling the isomerization of Azobenzenes in the cavity of a flexible coordination cage type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 142 year: '2020' ... --- _id: '13367' abstract: - lang: eng text: Confining molecules can fundamentally change their chemical and physical properties. Confinement effects are considered instrumental at various stages of the origins of life, and life continues to rely on layers of compartmentalization to maintain an out-of-equilibrium state and efficiently synthesize complex biomolecules under mild conditions. As interest in synthetic confined systems grows, we are realizing that the principles governing reactivity under confinement are the same in abiological systems as they are in nature. In this Review, we categorize the ways in which nanoconfinement effects impact chemical reactivity in synthetic systems. Under nanoconfinement, chemical properties can be modulated to increase reaction rates, enhance selectivity and stabilize reactive species. Confinement effects also lead to changes in physical properties. The fluorescence of light emitters, the colours of dyes and electronic communication between electroactive species can all be tuned under confinement. Within each of these categories, we elucidate design principles and strategies that are widely applicable across a range of confined systems, specifically highlighting examples of different nanocompartments that influence reactivity in similar ways. article_processing_charge: No article_type: original author: - first_name: Angela B. full_name: Grommet, Angela B. last_name: Grommet - first_name: Moran full_name: Feller, Moran last_name: Feller - first_name: Rafal full_name: Klajn, Rafal id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b last_name: Klajn citation: ama: Grommet AB, Feller M, Klajn R. Chemical reactivity under nanoconfinement. Nature Nanotechnology. 2020;15:256-271. doi:10.1038/s41565-020-0652-2 apa: Grommet, A. B., Feller, M., & Klajn, R. (2020). Chemical reactivity under nanoconfinement. Nature Nanotechnology. Springer Nature. https://doi.org/10.1038/s41565-020-0652-2 chicago: Grommet, Angela B., Moran Feller, and Rafal Klajn. “Chemical Reactivity under Nanoconfinement.” Nature Nanotechnology. Springer Nature, 2020. https://doi.org/10.1038/s41565-020-0652-2. ieee: A. B. Grommet, M. Feller, and R. Klajn, “Chemical reactivity under nanoconfinement,” Nature Nanotechnology, vol. 15. Springer Nature, pp. 256–271, 2020. ista: Grommet AB, Feller M, Klajn R. 2020. Chemical reactivity under nanoconfinement. Nature Nanotechnology. 15, 256–271. mla: Grommet, Angela B., et al. “Chemical Reactivity under Nanoconfinement.” Nature Nanotechnology, vol. 15, Springer Nature, 2020, pp. 256–71, doi:10.1038/s41565-020-0652-2. short: A.B. Grommet, M. Feller, R. Klajn, Nature Nanotechnology 15 (2020) 256–271. date_created: 2023-08-01T09:37:39Z date_published: 2020-04-17T00:00:00Z date_updated: 2024-10-14T12:13:35Z day: '17' doi: 10.1038/s41565-020-0652-2 extern: '1' external_id: pmid: - '32303705' intvolume: ' 15' keyword: - Electrical and Electronic Engineering - Condensed Matter Physics - General Materials Science - Biomedical Engineering - Atomic and Molecular Physics - and Optics - Bioengineering language: - iso: eng month: '04' oa_version: None page: 256-271 pmid: 1 publication: Nature Nanotechnology publication_identifier: eissn: - 1748-3395 issn: - 1748-3387 publication_status: published publisher: Springer Nature quality_controlled: '1' scopus_import: '1' status: public title: Chemical reactivity under nanoconfinement type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 15 year: '2020' ... --- _id: '13368' abstract: - lang: eng text: Scanning nanoscale superconducting quantum interference devices (nanoSQUIDs) are of growing interest for highly sensitive quantitative imaging of magnetic, spintronic, and transport properties of low-dimensional systems. Utilizing specifically designed grooved quartz capillaries pulled into a sharp pipette, we have fabricated the smallest SQUID-on-tip (SOT) devices with effective diameters down to 39 nm. Integration of a resistive shunt in close proximity to the pipette apex combined with self-aligned deposition of In and Sn, has resulted in SOTs with a flux noise of 42 nΦ0 Hz−1/2, yielding a record low spin noise of 0.29 μB Hz−1/2. In addition, the new SOTs function at sub-Kelvin temperatures and in high magnetic fields of over 2.5 T. Integrating the SOTs into a scanning probe microscope allowed us to image the stray field of a single Fe3O4 nanocube at 300 mK. Our results show that the easy magnetization axis direction undergoes a transition from the 〈111〉 direction at room temperature to an in-plane orientation, which could be attributed to the Verwey phase transition in Fe3O4. article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Y. full_name: Anahory, Y. last_name: Anahory - first_name: H. R. full_name: Naren, H. R. last_name: Naren - first_name: E. O. full_name: Lachman, E. O. last_name: Lachman - first_name: S. full_name: Buhbut Sinai, S. last_name: Buhbut Sinai - first_name: A. full_name: Uri, A. last_name: Uri - first_name: L. full_name: Embon, L. last_name: Embon - first_name: E. full_name: Yaakobi, E. last_name: Yaakobi - first_name: Y. full_name: Myasoedov, Y. last_name: Myasoedov - first_name: M. E. full_name: Huber, M. E. last_name: Huber - first_name: Rafal full_name: Klajn, Rafal id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b last_name: Klajn - first_name: E. full_name: Zeldov, E. last_name: Zeldov citation: ama: Anahory Y, Naren HR, Lachman EO, et al. SQUID-on-tip with single-electron spin sensitivity for high-field and ultra-low temperature nanomagnetic imaging. Nanoscale. 2020;12(5):3174-3182. doi:10.1039/c9nr08578e apa: Anahory, Y., Naren, H. R., Lachman, E. O., Buhbut Sinai, S., Uri, A., Embon, L., … Zeldov, E. (2020). SQUID-on-tip with single-electron spin sensitivity for high-field and ultra-low temperature nanomagnetic imaging. Nanoscale. Royal Society of Chemistry. https://doi.org/10.1039/c9nr08578e chicago: Anahory, Y., H. R. Naren, E. O. Lachman, S. Buhbut Sinai, A. Uri, L. Embon, E. Yaakobi, et al. “SQUID-on-Tip with Single-Electron Spin Sensitivity for High-Field and Ultra-Low Temperature Nanomagnetic Imaging.” Nanoscale. Royal Society of Chemistry, 2020. https://doi.org/10.1039/c9nr08578e. ieee: Y. Anahory et al., “SQUID-on-tip with single-electron spin sensitivity for high-field and ultra-low temperature nanomagnetic imaging,” Nanoscale, vol. 12, no. 5. Royal Society of Chemistry, pp. 3174–3182, 2020. ista: Anahory Y, Naren HR, Lachman EO, Buhbut Sinai S, Uri A, Embon L, Yaakobi E, Myasoedov Y, Huber ME, Klajn R, Zeldov E. 2020. SQUID-on-tip with single-electron spin sensitivity for high-field and ultra-low temperature nanomagnetic imaging. Nanoscale. 12(5), 3174–3182. mla: Anahory, Y., et al. “SQUID-on-Tip with Single-Electron Spin Sensitivity for High-Field and Ultra-Low Temperature Nanomagnetic Imaging.” Nanoscale, vol. 12, no. 5, Royal Society of Chemistry, 2020, pp. 3174–82, doi:10.1039/c9nr08578e. short: Y. Anahory, H.R. Naren, E.O. Lachman, S. Buhbut Sinai, A. Uri, L. Embon, E. Yaakobi, Y. Myasoedov, M.E. Huber, R. Klajn, E. Zeldov, Nanoscale 12 (2020) 3174–3182. date_created: 2023-08-01T09:37:53Z date_published: 2020-01-10T00:00:00Z date_updated: 2023-08-07T10:32:15Z day: '10' doi: 10.1039/c9nr08578e extern: '1' external_id: arxiv: - '2001.03342' pmid: - '31967152' intvolume: ' 12' issue: '5' keyword: - General Materials Science language: - iso: eng main_file_link: - url: https://doi.org/10.48550/arXiv.2001.03342 month: '01' oa_version: Preprint page: 3174-3182 pmid: 1 publication: Nanoscale publication_identifier: eissn: - 2040-3372 issn: - 2040-3364 publication_status: published publisher: Royal Society of Chemistry quality_controlled: '1' scopus_import: '1' status: public title: SQUID-on-tip with single-electron spin sensitivity for high-field and ultra-low temperature nanomagnetic imaging type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 12 year: '2020' ... --- _id: '13460' abstract: - lang: eng text: Binary interaction can cause stellar envelopes to be stripped, which significantly reduces the radius of the star. The orbit of a binary composed of a stripped star and a compact object can therefore be so tight that the gravitational radiation the system produces reaches frequencies accessible to the Laser Interferometer Space Antenna (LISA). Two such stripped stars in tight orbits with white dwarfs are known so far (ZTF J2130+4420 and CD−30°11223), but many more are expected to exist. These binaries provide important constraints for binary evolution models and may be used as LISA verification sources. We develop a Monte Carlo code that uses detailed evolutionary models to simulate the Galactic population of stripped stars in tight orbits with either neutron star or white dwarf companions. We predict 0–100 stripped star + white dwarf binaries and 0–4 stripped star + neutron star binaries with a signal-to-noise ratio >5 after 10 yr of observations with LISA. More than 90% of these binaries are expected to show large radial velocity shifts of ≳200 $\,\mathrm{km}\,{{\rm{s}}}^{-1}$, which are spectroscopically detectable. Photometric variability due to tidal deformation of the stripped star is also expected and has been observed in ZTF J2130+4420 and CD−30°11223. In addition, the stripped star + neutron star binaries are expected to be X-ray bright with LX ≳ 1033–1036 $\,\mathrm{erg}\,{{\rm{s}}}^{-1}$. Our results show that stripped star binaries are promising multimessenger sources for the upcoming electromagnetic and gravitational wave facilities. article_number: '56' article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Ylva Louise Linsdotter full_name: Götberg, Ylva Louise Linsdotter id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d last_name: Götberg orcid: 0000-0002-6960-6911 - first_name: V. full_name: Korol, V. last_name: Korol - first_name: A. full_name: Lamberts, A. last_name: Lamberts - first_name: T. full_name: Kupfer, T. last_name: Kupfer - first_name: K. full_name: Breivik, K. last_name: Breivik - first_name: B. full_name: Ludwig, B. last_name: Ludwig - first_name: M. R. full_name: Drout, M. R. last_name: Drout citation: ama: 'Götberg YLL, Korol V, Lamberts A, et al. Stars stripped in binaries: The living gravitational-wave sources. The Astrophysical Journal. 2020;904(1). doi:10.3847/1538-4357/abbda5' apa: 'Götberg, Y. L. L., Korol, V., Lamberts, A., Kupfer, T., Breivik, K., Ludwig, B., & Drout, M. R. (2020). Stars stripped in binaries: The living gravitational-wave sources. The Astrophysical Journal. American Astronomical Society. https://doi.org/10.3847/1538-4357/abbda5' chicago: 'Götberg, Ylva Louise Linsdotter, V. Korol, A. Lamberts, T. Kupfer, K. Breivik, B. Ludwig, and M. R. Drout. “Stars Stripped in Binaries: The Living Gravitational-Wave Sources.” The Astrophysical Journal. American Astronomical Society, 2020. https://doi.org/10.3847/1538-4357/abbda5.' ieee: 'Y. L. L. Götberg et al., “Stars stripped in binaries: The living gravitational-wave sources,” The Astrophysical Journal, vol. 904, no. 1. American Astronomical Society, 2020.' ista: 'Götberg YLL, Korol V, Lamberts A, Kupfer T, Breivik K, Ludwig B, Drout MR. 2020. Stars stripped in binaries: The living gravitational-wave sources. The Astrophysical Journal. 904(1), 56.' mla: 'Götberg, Ylva Louise Linsdotter, et al. “Stars Stripped in Binaries: The Living Gravitational-Wave Sources.” The Astrophysical Journal, vol. 904, no. 1, 56, American Astronomical Society, 2020, doi:10.3847/1538-4357/abbda5.' short: Y.L.L. Götberg, V. Korol, A. Lamberts, T. Kupfer, K. Breivik, B. Ludwig, M.R. Drout, The Astrophysical Journal 904 (2020). date_created: 2023-08-03T10:12:07Z date_published: 2020-11-20T00:00:00Z date_updated: 2024-10-14T12:23:03Z day: '20' doi: 10.3847/1538-4357/abbda5 extern: '1' external_id: arxiv: - '2006.07382' intvolume: ' 904' issue: '1' keyword: - Space and Planetary Science - Astronomy and Astrophysics language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.48550/arXiv.2006.07382 month: '11' oa: 1 oa_version: Preprint publication: The Astrophysical Journal publication_identifier: eissn: - 1538-4357 issn: - 0004-637X publication_status: published publisher: American Astronomical Society quality_controlled: '1' scopus_import: '1' status: public title: 'Stars stripped in binaries: The living gravitational-wave sources' type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 904 year: '2020' ... --- _id: '13461' abstract: - lang: eng text: High-resolution numerical simulations including feedback and aimed at calculating the escape fraction (fesc) of hydrogen-ionizing photons often assume stellar radiation based on single-stellar population synthesis models. However, strong evidence suggests the binary fraction of massive stars is ≳70%. Moreover, simulations so far have yielded values of fesc falling only on the lower end of the ∼10%–20% range, the amount presumed necessary to reionize the universe. Analyzing a high-resolution (4 pc) cosmological radiation-hydrodynamic simulation, we study how fesc changes when we include two different products of binary stellar evolution—stars stripped of their hydrogen envelopes and massive blue stragglers. Both produce significant amounts of ionizing photons 10–200 Myr after each starburst. We find the relative importance of these photons to be amplified with respect to escaped ionizing photons, because peaks in star formation rates (SFRs) and fesc are often out of phase by this 10–200 Myr. Additionally, low-mass, bursty galaxies emit Lyman continuum radiation primarily from binary products when SFRs are low. Observations of these galaxies by the James Webb Space Telescope could provide crucial information on the evolution of binary stars as a function of redshift. Overall, including stripped stars and massive blue stragglers increases our photon-weighted mean escape fraction ($\langle {f}_{\mathrm{esc}}\rangle $) by ∼13% and ∼10%, respectively, resulting in $\langle {f}_{\mathrm{esc}}\rangle =17 \% $. Our results emphasize that using updated stellar population synthesis models with binary stellar evolution provides a more sound physical basis for stellar reionization. article_number: '72' article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Amy full_name: Secunda, Amy last_name: Secunda - first_name: Renyue full_name: Cen, Renyue last_name: Cen - first_name: Taysun full_name: Kimm, Taysun last_name: Kimm - first_name: Ylva Louise Linsdotter full_name: Götberg, Ylva Louise Linsdotter id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d last_name: Götberg orcid: 0000-0002-6960-6911 - first_name: Selma E. full_name: de Mink, Selma E. last_name: de Mink citation: ama: Secunda A, Cen R, Kimm T, Götberg YLL, de Mink SE. Delayed photons from binary evolution help reionize the universe. The Astrophysical Journal. 2020;901(1). doi:10.3847/1538-4357/abaefa apa: Secunda, A., Cen, R., Kimm, T., Götberg, Y. L. L., & de Mink, S. E. (2020). Delayed photons from binary evolution help reionize the universe. The Astrophysical Journal. American Astronomical Society. https://doi.org/10.3847/1538-4357/abaefa chicago: Secunda, Amy, Renyue Cen, Taysun Kimm, Ylva Louise Linsdotter Götberg, and Selma E. de Mink. “Delayed Photons from Binary Evolution Help Reionize the Universe.” The Astrophysical Journal. American Astronomical Society, 2020. https://doi.org/10.3847/1538-4357/abaefa. ieee: A. Secunda, R. Cen, T. Kimm, Y. L. L. Götberg, and S. E. de Mink, “Delayed photons from binary evolution help reionize the universe,” The Astrophysical Journal, vol. 901, no. 1. American Astronomical Society, 2020. ista: Secunda A, Cen R, Kimm T, Götberg YLL, de Mink SE. 2020. Delayed photons from binary evolution help reionize the universe. The Astrophysical Journal. 901(1), 72. mla: Secunda, Amy, et al. “Delayed Photons from Binary Evolution Help Reionize the Universe.” The Astrophysical Journal, vol. 901, no. 1, 72, American Astronomical Society, 2020, doi:10.3847/1538-4357/abaefa. short: A. Secunda, R. Cen, T. Kimm, Y.L.L. Götberg, S.E. de Mink, The Astrophysical Journal 901 (2020). date_created: 2023-08-03T10:12:16Z date_published: 2020-09-23T00:00:00Z date_updated: 2023-08-09T13:01:45Z day: '23' doi: 10.3847/1538-4357/abaefa extern: '1' external_id: arxiv: - '2007.15012' intvolume: ' 901' issue: '1' keyword: - Space and Planetary Science - Astronomy and Astrophysics language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.3847/1538-4357/abaefa month: '09' oa: 1 oa_version: Published Version publication: The Astrophysical Journal publication_identifier: eissn: - 1538-4357 issn: - 0004-637X publication_status: published publisher: American Astronomical Society quality_controlled: '1' scopus_import: '1' status: public title: Delayed photons from binary evolution help reionize the universe type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 901 year: '2020' ... --- _id: '13463' abstract: - lang: eng text: 'Present and upcoming time-domain astronomy efforts, in part driven by gravitational-wave follow-up campaigns, will unveil a variety of rare explosive transients in the sky. Here, we focus on pulsational pair-instability evolution, which can result in signatures that are observable with electromagnetic and gravitational waves. We simulated grids of bare helium stars to characterize the resulting black hole (BH) masses together with the ejecta composition, velocity, and thermal state. We find that the stars do not react “elastically” to the thermonuclear ignition in the core: there is not a one-to-one correspondence between pair-instability driven ignition and mass ejections, which causes ambiguity as to what is an observable pulse. In agreement with previous studies, we find that for initial helium core masses of 37.5 M⊙ ≲ MHe, init ≲ 41 M⊙, corresponding to carbon-oxygen core masses 27.5 M⊙ ≲ MCO ≲ 30.1 M⊙, the explosions are not strong enough to affect the surface. With increasing initial helium core mass, they become progressively stronger causing first large radial expansion (41 M⊙ ≲ MHe, init ≲ 42 M⊙, corresponding to 30.1 M⊙ ≲ MCO ≲ 30.8 M⊙) and, finally, also mass ejection episodes (for MHe, init ≳ 42 M⊙, or MCO ≳ 30.8 M⊙). The lowest mass helium core to be fully disrupted in a pair-instability supernova is MHe, init ≃ 80 M⊙, corresponding to MCO ≃ 55 M⊙. Models with MHe, init ≳ 200 M⊙ (MCO ≳ 114 M⊙) reach the photodisintegration regime, resulting in BHs with masses of MBH ≳ 125 M⊙. Although this is currently considered unlikely, if BHs from these models form via (weak) explosions, the previously-ejected material might be hit by the blast wave and convert kinetic energy into observable electromagnetic radiation. We characterize the hydrogen-free circumstellar material from the pulsational pair-instability of helium cores by simply assuming that the ejecta maintain a constant velocity after ejection. We find that our models produce helium-rich ejecta with mass of 10−3 M⊙ ≲ MCSM ≲ 40 M⊙, the larger values corresponding to the more massive progenitor stars. These ejecta are typically launched at a few thousand km s−1 and reach distances of ∼1012 − 1015 cm before the core-collapse of the star. The delays between mass ejection events and the final collapse span a wide and mass-dependent range (from subhour to 104 years), and the shells ejected can also collide with each other, powering supernova impostor events before the final core-collapse. The range of properties we find suggests a possible connection with (some) type Ibn supernovae.' article_number: A56 article_processing_charge: No article_type: original arxiv: 1 author: - first_name: M. full_name: Renzo, M. last_name: Renzo - first_name: R. full_name: Farmer, R. last_name: Farmer - first_name: S. full_name: Justham, S. last_name: Justham - first_name: Ylva Louise Linsdotter full_name: Götberg, Ylva Louise Linsdotter id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d last_name: Götberg orcid: 0000-0002-6960-6911 - first_name: S. E. full_name: de Mink, S. E. last_name: de Mink - first_name: E. full_name: Zapartas, E. last_name: Zapartas - first_name: P. full_name: Marchant, P. last_name: Marchant - first_name: N. full_name: Smith, N. last_name: Smith citation: ama: Renzo M, Farmer R, Justham S, et al. Predictions for the hydrogen-free ejecta of pulsational pair-instability supernovae. Astronomy & Astrophysics. 2020;640. doi:10.1051/0004-6361/202037710 apa: Renzo, M., Farmer, R., Justham, S., Götberg, Y. L. L., de Mink, S. E., Zapartas, E., … Smith, N. (2020). Predictions for the hydrogen-free ejecta of pulsational pair-instability supernovae. Astronomy & Astrophysics. EDP Sciences. https://doi.org/10.1051/0004-6361/202037710 chicago: Renzo, M., R. Farmer, S. Justham, Ylva Louise Linsdotter Götberg, S. E. de Mink, E. Zapartas, P. Marchant, and N. Smith. “Predictions for the Hydrogen-Free Ejecta of Pulsational Pair-Instability Supernovae.” Astronomy & Astrophysics. EDP Sciences, 2020. https://doi.org/10.1051/0004-6361/202037710. ieee: M. Renzo et al., “Predictions for the hydrogen-free ejecta of pulsational pair-instability supernovae,” Astronomy & Astrophysics, vol. 640. EDP Sciences, 2020. ista: Renzo M, Farmer R, Justham S, Götberg YLL, de Mink SE, Zapartas E, Marchant P, Smith N. 2020. Predictions for the hydrogen-free ejecta of pulsational pair-instability supernovae. Astronomy & Astrophysics. 640, A56. mla: Renzo, M., et al. “Predictions for the Hydrogen-Free Ejecta of Pulsational Pair-Instability Supernovae.” Astronomy & Astrophysics, vol. 640, A56, EDP Sciences, 2020, doi:10.1051/0004-6361/202037710. short: M. Renzo, R. Farmer, S. Justham, Y.L.L. Götberg, S.E. de Mink, E. Zapartas, P. Marchant, N. Smith, Astronomy & Astrophysics 640 (2020). date_created: 2023-08-03T10:12:58Z date_published: 2020-08-12T00:00:00Z date_updated: 2023-08-09T12:58:41Z day: '12' doi: 10.1051/0004-6361/202037710 extern: '1' external_id: arxiv: - '2002.05077' intvolume: ' 640' keyword: - Space and Planetary Science - Astronomy and Astrophysics language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1051/0004-6361/202037710 month: '08' oa: 1 oa_version: Published Version publication: Astronomy & Astrophysics publication_identifier: eissn: - 1432-0746 issn: - 0004-6361 publication_status: published publisher: EDP Sciences quality_controlled: '1' scopus_import: '1' status: public title: Predictions for the hydrogen-free ejecta of pulsational pair-instability supernovae type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 640 year: '2020' ... --- _id: '13464' abstract: - lang: eng text: Massive binaries that merge as compact objects are the progenitors of gravitational-wave sources. Most of these binaries experience one or more phases of mass transfer, during which one of the stars loses all or part of its outer envelope and becomes a stripped-envelope star. The evolution of the size of these stripped stars is crucial in determining whether they experience further interactions and understanding their ultimate fate. We present new calculations of stripped-envelope stars based on binary evolution models computed with MESA. We use these to investigate their radius evolution as a function of mass and metallicity. We further discuss their pre-supernova observable characteristics and potential consequences of their evolution on the properties of supernovae from stripped stars. At high metallicity, we find that practically all of the hydrogen-rich envelope is removed, which is in agreement with earlier findings. Only progenitors with initial masses below 10 M⊙ expand to large radii (up to 100 R⊙), while more massive progenitors remain compact. At low metallicity, a substantial amount of hydrogen remains and the progenitors can, in principle, expand to giant sizes (> 400 R⊙) for all masses we consider. This implies that they can fill their Roche lobe anew. We show that the prescriptions commonly used in population synthesis models underestimate the stellar radii by up to two orders of magnitude. We expect that this has consequences for the predictions for gravitational-wave sources from double neutron star mergers, particularly with regard to their metallicity dependence. article_number: A6 article_processing_charge: No article_type: original arxiv: 1 author: - first_name: E. full_name: Laplace, E. last_name: Laplace - first_name: Ylva Louise Linsdotter full_name: Götberg, Ylva Louise Linsdotter id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d last_name: Götberg orcid: 0000-0002-6960-6911 - first_name: S. E. full_name: de Mink, S. E. last_name: de Mink - first_name: S. full_name: Justham, S. last_name: Justham - first_name: R. full_name: Farmer, R. last_name: Farmer citation: ama: 'Laplace E, Götberg YLL, de Mink SE, Justham S, Farmer R. The expansion of stripped-envelope stars: Consequences for supernovae and gravitational-wave progenitors. Astronomy & Astrophysics. 2020;637. doi:10.1051/0004-6361/201937300' apa: 'Laplace, E., Götberg, Y. L. L., de Mink, S. E., Justham, S., & Farmer, R. (2020). The expansion of stripped-envelope stars: Consequences for supernovae and gravitational-wave progenitors. Astronomy & Astrophysics. EDP Sciences. https://doi.org/10.1051/0004-6361/201937300' chicago: 'Laplace, E., Ylva Louise Linsdotter Götberg, S. E. de Mink, S. Justham, and R. Farmer. “The Expansion of Stripped-Envelope Stars: Consequences for Supernovae and Gravitational-Wave Progenitors.” Astronomy & Astrophysics. EDP Sciences, 2020. https://doi.org/10.1051/0004-6361/201937300.' ieee: 'E. Laplace, Y. L. L. Götberg, S. E. de Mink, S. Justham, and R. Farmer, “The expansion of stripped-envelope stars: Consequences for supernovae and gravitational-wave progenitors,” Astronomy & Astrophysics, vol. 637. EDP Sciences, 2020.' ista: 'Laplace E, Götberg YLL, de Mink SE, Justham S, Farmer R. 2020. The expansion of stripped-envelope stars: Consequences for supernovae and gravitational-wave progenitors. Astronomy & Astrophysics. 637, A6.' mla: 'Laplace, E., et al. “The Expansion of Stripped-Envelope Stars: Consequences for Supernovae and Gravitational-Wave Progenitors.” Astronomy & Astrophysics, vol. 637, A6, EDP Sciences, 2020, doi:10.1051/0004-6361/201937300.' short: E. Laplace, Y.L.L. Götberg, S.E. de Mink, S. Justham, R. Farmer, Astronomy & Astrophysics 637 (2020). date_created: 2023-08-03T10:13:10Z date_published: 2020-05-01T00:00:00Z date_updated: 2023-08-09T12:56:32Z day: '01' doi: 10.1051/0004-6361/201937300 extern: '1' external_id: arxiv: - '2003.01120' intvolume: ' 637' keyword: - Space and Planetary Science - Astronomy and Astrophysics language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1051/0004-6361/201937300 month: '05' oa: 1 oa_version: Published Version publication: Astronomy & Astrophysics publication_identifier: eissn: - 1432-0746 issn: - 0004-6361 publication_status: published publisher: EDP Sciences quality_controlled: '1' scopus_import: '1' status: public title: 'The expansion of stripped-envelope stars: Consequences for supernovae and gravitational-wave progenitors' type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 637 year: '2020' ... --- _id: '13465' abstract: - lang: eng text: "Gravitational-wave detections are now probing the black hole (BH) mass distribution, including the predicted pair-instability mass gap. These data require robust quantitative predictions, which are challenging to obtain. The most massive BH progenitors experience episodic mass ejections on time-scales shorter than the convective turnover time-scale. This invalidates the steady-state assumption on which the classic mixing length theory relies. We compare the final BH masses computed with two different versions of the stellar evolutionary code MESA\r\n⁠: (i) using the default implementation of Paxton et al. (2018) and (ii) solving an additional equation accounting for the time-scale for convective deceleration. In the second grid, where stronger convection develops during the pulses and carries part of the energy, we find weaker pulses. This leads to lower amounts of mass being ejected and thus higher final BH masses of up to ∼5M⊙\r\n⁠. The differences are much smaller for the progenitors that determine the maximum mass of BHs below the gap. This prediction is robust at MBH,max≃48M⊙\r\n⁠, at least within the idealized context of this study. This is an encouraging indication that current models are robust enough for comparison with the present-day gravitational-wave detections. However, the large differences between individual models emphasize the importance of improving the treatment of convection in stellar models, especially in the light of the data anticipated from the third generation of gravitational-wave detectors." article_processing_charge: No article_type: original arxiv: 1 author: - first_name: M full_name: Renzo, M last_name: Renzo - first_name: R J full_name: Farmer, R J last_name: Farmer - first_name: S full_name: Justham, S last_name: Justham - first_name: S E full_name: de Mink, S E last_name: de Mink - first_name: Ylva Louise Linsdotter full_name: Götberg, Ylva Louise Linsdotter id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d last_name: Götberg orcid: 0000-0002-6960-6911 - first_name: P full_name: Marchant, P last_name: Marchant citation: ama: Renzo M, Farmer RJ, Justham S, de Mink SE, Götberg YLL, Marchant P. Sensitivity of the lower edge of the pair-instability black hole mass gap to the treatment of time-dependent convection. Monthly Notices of the Royal Astronomical Society. 2020;493(3):4333-4341. doi:10.1093/mnras/staa549 apa: Renzo, M., Farmer, R. J., Justham, S., de Mink, S. E., Götberg, Y. L. L., & Marchant, P. (2020). Sensitivity of the lower edge of the pair-instability black hole mass gap to the treatment of time-dependent convection. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/staa549 chicago: Renzo, M, R J Farmer, S Justham, S E de Mink, Ylva Louise Linsdotter Götberg, and P Marchant. “Sensitivity of the Lower Edge of the Pair-Instability Black Hole Mass Gap to the Treatment of Time-Dependent Convection.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2020. https://doi.org/10.1093/mnras/staa549. ieee: M. Renzo, R. J. Farmer, S. Justham, S. E. de Mink, Y. L. L. Götberg, and P. Marchant, “Sensitivity of the lower edge of the pair-instability black hole mass gap to the treatment of time-dependent convection,” Monthly Notices of the Royal Astronomical Society, vol. 493, no. 3. Oxford University Press, pp. 4333–4341, 2020. ista: Renzo M, Farmer RJ, Justham S, de Mink SE, Götberg YLL, Marchant P. 2020. Sensitivity of the lower edge of the pair-instability black hole mass gap to the treatment of time-dependent convection. Monthly Notices of the Royal Astronomical Society. 493(3), 4333–4341. mla: Renzo, M., et al. “Sensitivity of the Lower Edge of the Pair-Instability Black Hole Mass Gap to the Treatment of Time-Dependent Convection.” Monthly Notices of the Royal Astronomical Society, vol. 493, no. 3, Oxford University Press, 2020, pp. 4333–41, doi:10.1093/mnras/staa549. short: M. Renzo, R.J. Farmer, S. Justham, S.E. de Mink, Y.L.L. Götberg, P. Marchant, Monthly Notices of the Royal Astronomical Society 493 (2020) 4333–4341. date_created: 2023-08-03T10:13:20Z date_published: 2020-04-04T00:00:00Z date_updated: 2023-08-09T12:53:37Z day: '04' doi: 10.1093/mnras/staa549 extern: '1' external_id: arxiv: - '2002.08200' intvolume: ' 493' issue: '3' keyword: - Space and Planetary Science - Astronomy and Astrophysics language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1093/mnras/staa549 month: '04' oa: 1 oa_version: Published Version page: 4333-4341 publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' scopus_import: '1' status: public title: Sensitivity of the lower edge of the pair-instability black hole mass gap to the treatment of time-dependent convection type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 493 year: '2020' ... --- _id: '13466' abstract: - lang: eng text: "Context. A majority of massive stars are part of binary systems, a large fraction of which will inevitably interact during their lives. Binary-interaction products (BiPs), that is, stars affected by such interaction, are expected to be commonly present in stellar populations. BiPs are thus a crucial ingredient in the understanding of stellar evolution.\r\nAims. We aim to identify and characterize a statistically significant sample of BiPs by studying clusters of 10 − 40 Myr, an age at which binary population models predict the abundance of BiPs to be highest. One example of such a cluster is NGC 330 in the Small Magellanic Cloud.\r\nMethods. Using MUSE WFM-AO observations of NGC 330, we resolved the dense cluster core for the first time and were able to extract spectra of its entire massive star population. We developed an automated spectral classification scheme based on the equivalent widths of spectral lines in the red part of the spectrum.\r\nResults. We characterize the massive star content of the core of NGC 330, which contains more than 200 B stars, 2 O stars, 6 A-type supergiants, and 11 red supergiants. We find a lower limit on the Be star fraction of 32 ± 3% in the whole sample. It increases to at least 46 ± 10% when we only consider stars brighter than V = 17 mag. We estimate an age of the cluster core between 35 and 40 Myr and a total cluster mass of 88−18+17 × 103 M⊙.\r\nConclusions. We find that the population in the cluster core is different than the population in the outskirts: while the stellar content in the core appears to be older than the stars in the outskirts, the Be star fraction and the observed binary fraction are significantly higher. Furthermore, we detect several BiP candidates that will be subject of future studies." article_number: A51 article_processing_charge: No article_type: original arxiv: 1 author: - first_name: J. full_name: Bodensteiner, J. last_name: Bodensteiner - first_name: H. full_name: Sana, H. last_name: Sana - first_name: L. full_name: Mahy, L. last_name: Mahy - first_name: L. R. full_name: Patrick, L. R. last_name: Patrick - first_name: A. full_name: de Koter, A. last_name: de Koter - first_name: S. E. full_name: de Mink, S. E. last_name: de Mink - first_name: C. J. full_name: Evans, C. J. last_name: Evans - first_name: Ylva Louise Linsdotter full_name: Götberg, Ylva Louise Linsdotter id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d last_name: Götberg orcid: 0000-0002-6960-6911 - first_name: N. full_name: Langer, N. last_name: Langer - first_name: D. J. full_name: Lennon, D. J. last_name: Lennon - first_name: F. R. N. full_name: Schneider, F. R. N. last_name: Schneider - first_name: F. full_name: Tramper, F. last_name: Tramper citation: ama: Bodensteiner J, Sana H, Mahy L, et al. The young massive SMC cluster NGC 330 seen by MUSE. Astronomy & Astrophysics. 2020;634. doi:10.1051/0004-6361/201936743 apa: Bodensteiner, J., Sana, H., Mahy, L., Patrick, L. R., de Koter, A., de Mink, S. E., … Tramper, F. (2020). The young massive SMC cluster NGC 330 seen by MUSE. Astronomy & Astrophysics. EDP Sciences. https://doi.org/10.1051/0004-6361/201936743 chicago: Bodensteiner, J., H. Sana, L. Mahy, L. R. Patrick, A. de Koter, S. E. de Mink, C. J. Evans, et al. “The Young Massive SMC Cluster NGC 330 Seen by MUSE.” Astronomy & Astrophysics. EDP Sciences, 2020. https://doi.org/10.1051/0004-6361/201936743. ieee: J. Bodensteiner et al., “The young massive SMC cluster NGC 330 seen by MUSE,” Astronomy & Astrophysics, vol. 634. EDP Sciences, 2020. ista: Bodensteiner J, Sana H, Mahy L, Patrick LR, de Koter A, de Mink SE, Evans CJ, Götberg YLL, Langer N, Lennon DJ, Schneider FRN, Tramper F. 2020. The young massive SMC cluster NGC 330 seen by MUSE. Astronomy & Astrophysics. 634, A51. mla: Bodensteiner, J., et al. “The Young Massive SMC Cluster NGC 330 Seen by MUSE.” Astronomy & Astrophysics, vol. 634, A51, EDP Sciences, 2020, doi:10.1051/0004-6361/201936743. short: J. Bodensteiner, H. Sana, L. Mahy, L.R. Patrick, A. de Koter, S.E. de Mink, C.J. Evans, Y.L.L. Götberg, N. Langer, D.J. Lennon, F.R.N. Schneider, F. Tramper, Astronomy & Astrophysics 634 (2020). date_created: 2023-08-03T10:13:29Z date_published: 2020-02-05T00:00:00Z date_updated: 2023-08-09T12:50:01Z day: '05' doi: 10.1051/0004-6361/201936743 extern: '1' external_id: arxiv: - '1911.03477' intvolume: ' 634' keyword: - 'stars: massive / stars: emission-line / Be / binaries: spectroscopic / blue stragglers / Magellanic Clouds' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1051/0004-6361/201936743 month: '02' oa: 1 oa_version: Published Version publication: Astronomy & Astrophysics publication_identifier: eissn: - 1432-0746 issn: - 0004-6361 publication_status: published publisher: EDP Sciences quality_controlled: '1' scopus_import: '1' status: public title: The young massive SMC cluster NGC 330 seen by MUSE type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 634 year: '2020' ... --- _id: '13467' abstract: - lang: eng text: Massive stars are often found in binary systems, and it has been argued that binary products boost the ionizing radiation of stellar populations. Accurate predictions for binary products are needed to understand and quantify their contribution to cosmic reionization. We investigate the contribution of stars stripped in binaries because (1) they are, arguably, the best-understood products of binary evolution, (2) we recently produced the first radiative transfer calculations for the atmospheres of these stripped stars that predict their ionizing spectra, and (3) they are very promising sources because they boost the ionizing emission of stellar populations at late times. This allows stellar feedback to clear the surroundings such that a higher fraction of their photons can escape and ionize the intergalactic medium. Combining our detailed predictions for the ionizing spectra with a simple cosmic reionization model, we estimate that stripped stars contributed tens of percent of the photons that caused cosmic reionization of hydrogen, depending on the assumed escape fractions. More importantly, stripped stars harden the ionizing emission. We estimate that the spectral index for the ionizing part of the spectrum can increase to −1 compared to ≲ − 2 for single stars. At high redshift, stripped stars and massive single stars combined dominate the He II-ionizing emission, but we expect that active galactic nuclei drive cosmic helium reionization. Further observational consequences we expect are (1) high ionization states for the intergalactic gas surrounding stellar systems, such as C IV and Si IV, and (2) additional heating of the intergalactic medium of up to a few thousand Kelvin. Quantifying these warrants the inclusion of accurate models for stripped stars and other binary products in full cosmological simulations. article_number: A134 article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Ylva Louise Linsdotter full_name: Götberg, Ylva Louise Linsdotter id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d last_name: Götberg orcid: 0000-0002-6960-6911 - first_name: S. E. full_name: de Mink, S. E. last_name: de Mink - first_name: M. full_name: McQuinn, M. last_name: McQuinn - first_name: E. full_name: Zapartas, E. last_name: Zapartas - first_name: J. H. full_name: Groh, J. H. last_name: Groh - first_name: C. full_name: Norman, C. last_name: Norman citation: ama: Götberg YLL, de Mink SE, McQuinn M, Zapartas E, Groh JH, Norman C. Contribution from stars stripped in binaries to cosmic reionization of hydrogen and helium. Astronomy & Astrophysics. 2020;634. doi:10.1051/0004-6361/201936669 apa: Götberg, Y. L. L., de Mink, S. E., McQuinn, M., Zapartas, E., Groh, J. H., & Norman, C. (2020). Contribution from stars stripped in binaries to cosmic reionization of hydrogen and helium. Astronomy & Astrophysics. EDP Sciences. https://doi.org/10.1051/0004-6361/201936669 chicago: Götberg, Ylva Louise Linsdotter, S. E. de Mink, M. McQuinn, E. Zapartas, J. H. Groh, and C. Norman. “Contribution from Stars Stripped in Binaries to Cosmic Reionization of Hydrogen and Helium.” Astronomy & Astrophysics. EDP Sciences, 2020. https://doi.org/10.1051/0004-6361/201936669. ieee: Y. L. L. Götberg, S. E. de Mink, M. McQuinn, E. Zapartas, J. H. Groh, and C. Norman, “Contribution from stars stripped in binaries to cosmic reionization of hydrogen and helium,” Astronomy & Astrophysics, vol. 634. EDP Sciences, 2020. ista: Götberg YLL, de Mink SE, McQuinn M, Zapartas E, Groh JH, Norman C. 2020. Contribution from stars stripped in binaries to cosmic reionization of hydrogen and helium. Astronomy & Astrophysics. 634, A134. mla: Götberg, Ylva Louise Linsdotter, et al. “Contribution from Stars Stripped in Binaries to Cosmic Reionization of Hydrogen and Helium.” Astronomy & Astrophysics, vol. 634, A134, EDP Sciences, 2020, doi:10.1051/0004-6361/201936669. short: Y.L.L. Götberg, S.E. de Mink, M. McQuinn, E. Zapartas, J.H. Groh, C. Norman, Astronomy & Astrophysics 634 (2020). date_created: 2023-08-03T10:13:43Z date_published: 2020-02-25T00:00:00Z date_updated: 2024-10-14T12:22:53Z day: '25' doi: 10.1051/0004-6361/201936669 extern: '1' external_id: arxiv: - '1911.00543' intvolume: ' 634' keyword: - Space and Planetary Science - Astronomy and Astrophysics language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1051/0004-6361/201936669 month: '02' oa: 1 oa_version: Published Version publication: Astronomy & Astrophysics publication_identifier: eissn: - 1432-0746 issn: - 0004-6361 publication_status: published publisher: EDP Sciences quality_controlled: '1' scopus_import: '1' status: public title: Contribution from stars stripped in binaries to cosmic reionization of hydrogen and helium type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 634 year: '2020' ... --- _id: '13998' abstract: - lang: eng text: The interaction of strong near-infrared (NIR) laser pulses with wide-bandgap dielectrics produces high harmonics in the extreme ultraviolet (XUV) wavelength range. These observations have opened up the possibility of attosecond metrology in solids, which would benefit from a precise measurement of the emission times of individual harmonics with respect to the NIR laser field. Here we show that, when high-harmonics are detected from the input surface of a magnesium oxide crystal, a bichromatic probing of the XUV emission shows a clear synchronization largely consistent with a semiclassical model of electron–hole recollisions in bulk solids. On the other hand, the bichromatic spectrogram of harmonics originating from the exit surface of the 200 μm-thick crystal is strongly modified, indicating the influence of laser field distortions during propagation. Our tracking of sub-cycle electron and hole re-collisions at XUV energies is relevant to the development of solid-state sources of attosecond pulses. article_number: '144003' article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Giulio full_name: Vampa, Giulio last_name: Vampa - first_name: Jian full_name: Lu, Jian last_name: Lu - first_name: Yong Sing full_name: You, Yong Sing last_name: You - first_name: Denitsa Rangelova full_name: Baykusheva, Denitsa Rangelova id: 71b4d059-2a03-11ee-914d-dfa3beed6530 last_name: Baykusheva - first_name: Mengxi full_name: Wu, Mengxi last_name: Wu - first_name: Hanzhe full_name: Liu, Hanzhe last_name: Liu - first_name: Kenneth J full_name: Schafer, Kenneth J last_name: Schafer - first_name: Mette B full_name: Gaarde, Mette B last_name: Gaarde - first_name: David A full_name: Reis, David A last_name: Reis - first_name: Shambhu full_name: Ghimire, Shambhu last_name: Ghimire citation: ama: 'Vampa G, Lu J, You YS, et al. Attosecond synchronization of extreme ultraviolet high harmonics from crystals. Journal of Physics B: Atomic, Molecular and Optical Physics. 2020;53(14). doi:10.1088/1361-6455/ab8e56' apa: 'Vampa, G., Lu, J., You, Y. S., Baykusheva, D. R., Wu, M., Liu, H., … Ghimire, S. (2020). Attosecond synchronization of extreme ultraviolet high harmonics from crystals. Journal of Physics B: Atomic, Molecular and Optical Physics. IOP Publishing. https://doi.org/10.1088/1361-6455/ab8e56' chicago: 'Vampa, Giulio, Jian Lu, Yong Sing You, Denitsa Rangelova Baykusheva, Mengxi Wu, Hanzhe Liu, Kenneth J Schafer, Mette B Gaarde, David A Reis, and Shambhu Ghimire. “Attosecond Synchronization of Extreme Ultraviolet High Harmonics from Crystals.” Journal of Physics B: Atomic, Molecular and Optical Physics. IOP Publishing, 2020. https://doi.org/10.1088/1361-6455/ab8e56.' ieee: 'G. Vampa et al., “Attosecond synchronization of extreme ultraviolet high harmonics from crystals,” Journal of Physics B: Atomic, Molecular and Optical Physics, vol. 53, no. 14. IOP Publishing, 2020.' ista: 'Vampa G, Lu J, You YS, Baykusheva DR, Wu M, Liu H, Schafer KJ, Gaarde MB, Reis DA, Ghimire S. 2020. Attosecond synchronization of extreme ultraviolet high harmonics from crystals. Journal of Physics B: Atomic, Molecular and Optical Physics. 53(14), 144003.' mla: 'Vampa, Giulio, et al. “Attosecond Synchronization of Extreme Ultraviolet High Harmonics from Crystals.” Journal of Physics B: Atomic, Molecular and Optical Physics, vol. 53, no. 14, 144003, IOP Publishing, 2020, doi:10.1088/1361-6455/ab8e56.' short: 'G. Vampa, J. Lu, Y.S. You, D.R. Baykusheva, M. Wu, H. Liu, K.J. Schafer, M.B. Gaarde, D.A. Reis, S. Ghimire, Journal of Physics B: Atomic, Molecular and Optical Physics 53 (2020).' date_created: 2023-08-09T13:09:51Z date_published: 2020-06-17T00:00:00Z date_updated: 2023-08-22T07:36:36Z day: '17' doi: 10.1088/1361-6455/ab8e56 extern: '1' external_id: arxiv: - '2001.09951' intvolume: ' 53' issue: '14' keyword: - Condensed Matter Physics - Atomic and Molecular Physics - and Optics language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2001.09951 month: '06' oa: 1 oa_version: Preprint publication: 'Journal of Physics B: Atomic, Molecular and Optical Physics' publication_identifier: eissn: - 1361-6455 issn: - 0953-4075 publication_status: published publisher: IOP Publishing quality_controlled: '1' scopus_import: '1' status: public title: Attosecond synchronization of extreme ultraviolet high harmonics from crystals type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 53 year: '2020' ... --- _id: '13999' abstract: - lang: eng text: Attosecond chronoscopy has revealed small but measurable delays in photoionization, characterized by the ejection of an electron on absorption of a single photon. Ionization-delay measurements in atomic targets provide a wealth of information about the timing of the photoelectric effect, resonances, electron correlations and transport. However, extending this approach to molecules presents challenges, such as identifying the correct ionization channels and the effect of the anisotropic molecular landscape on the measured delays. Here, we measure ionization delays from ethyl iodide around a giant dipole resonance. By using the theoretical value for the iodine atom as a reference, we disentangle the contribution from the functional ethyl group, which is responsible for the characteristic chemical reactivity of a molecule. We find a substantial additional delay caused by the presence of a functional group, which encodes the effect of the molecular potential on the departing electron. Such information is inaccessible to the conventional approach of measuring photoionization cross-sections. The results establish ionization-delay measurements as a valuable tool in investigating the electronic properties of molecules. article_processing_charge: No article_type: original author: - first_name: Shubhadeep full_name: Biswas, Shubhadeep last_name: Biswas - first_name: Benjamin full_name: Förg, Benjamin last_name: Förg - first_name: Lisa full_name: Ortmann, Lisa last_name: Ortmann - first_name: Johannes full_name: Schötz, Johannes last_name: Schötz - first_name: Wolfgang full_name: Schweinberger, Wolfgang last_name: Schweinberger - first_name: Tomáš full_name: Zimmermann, Tomáš last_name: Zimmermann - first_name: Liangwen full_name: Pi, Liangwen last_name: Pi - first_name: Denitsa Rangelova full_name: Baykusheva, Denitsa Rangelova id: 71b4d059-2a03-11ee-914d-dfa3beed6530 last_name: Baykusheva - first_name: Hafiz A. full_name: Masood, Hafiz A. last_name: Masood - first_name: Ioannis full_name: Liontos, Ioannis last_name: Liontos - first_name: Amgad M. full_name: Kamal, Amgad M. last_name: Kamal - first_name: Nora G. full_name: Kling, Nora G. last_name: Kling - first_name: Abdullah F. full_name: Alharbi, Abdullah F. last_name: Alharbi - first_name: Meshaal full_name: Alharbi, Meshaal last_name: Alharbi - first_name: Abdallah M. full_name: Azzeer, Abdallah M. last_name: Azzeer - first_name: Gregor full_name: Hartmann, Gregor last_name: Hartmann - first_name: Hans J. full_name: Wörner, Hans J. last_name: Wörner - first_name: Alexandra S. full_name: Landsman, Alexandra S. last_name: Landsman - first_name: Matthias F. full_name: Kling, Matthias F. last_name: Kling citation: ama: Biswas S, Förg B, Ortmann L, et al. Probing molecular environment through photoemission delays. Nature Physics. 2020;16(7):778-783. doi:10.1038/s41567-020-0887-8 apa: Biswas, S., Förg, B., Ortmann, L., Schötz, J., Schweinberger, W., Zimmermann, T., … Kling, M. F. (2020). Probing molecular environment through photoemission delays. Nature Physics. Springer Nature. https://doi.org/10.1038/s41567-020-0887-8 chicago: Biswas, Shubhadeep, Benjamin Förg, Lisa Ortmann, Johannes Schötz, Wolfgang Schweinberger, Tomáš Zimmermann, Liangwen Pi, et al. “Probing Molecular Environment through Photoemission Delays.” Nature Physics. Springer Nature, 2020. https://doi.org/10.1038/s41567-020-0887-8. ieee: S. Biswas et al., “Probing molecular environment through photoemission delays,” Nature Physics, vol. 16, no. 7. Springer Nature, pp. 778–783, 2020. ista: Biswas S, Förg B, Ortmann L, Schötz J, Schweinberger W, Zimmermann T, Pi L, Baykusheva DR, Masood HA, Liontos I, Kamal AM, Kling NG, Alharbi AF, Alharbi M, Azzeer AM, Hartmann G, Wörner HJ, Landsman AS, Kling MF. 2020. Probing molecular environment through photoemission delays. Nature Physics. 16(7), 778–783. mla: Biswas, Shubhadeep, et al. “Probing Molecular Environment through Photoemission Delays.” Nature Physics, vol. 16, no. 7, Springer Nature, 2020, pp. 778–83, doi:10.1038/s41567-020-0887-8. short: S. Biswas, B. Förg, L. Ortmann, J. Schötz, W. Schweinberger, T. Zimmermann, L. Pi, D.R. Baykusheva, H.A. Masood, I. Liontos, A.M. Kamal, N.G. Kling, A.F. Alharbi, M. Alharbi, A.M. Azzeer, G. Hartmann, H.J. Wörner, A.S. Landsman, M.F. Kling, Nature Physics 16 (2020) 778–783. date_created: 2023-08-09T13:10:07Z date_published: 2020-07-01T00:00:00Z date_updated: 2023-08-22T07:38:04Z day: '01' doi: 10.1038/s41567-020-0887-8 extern: '1' intvolume: ' 16' issue: '7' keyword: - General Physics and Astronomy language: - iso: eng month: '07' oa_version: None page: 778-783 publication: Nature Physics publication_identifier: eissn: - 1745-2481 issn: - 1745-2473 publication_status: published publisher: Springer Nature quality_controlled: '1' scopus_import: '1' status: public title: Probing molecular environment through photoemission delays type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 16 year: '2020' ... --- _id: '14000' abstract: - lang: eng text: This chapter presents an overview of the state of the art in attosecond time-resolved spectroscopy. The theoretical foundations of strong-field light–matter interaction and attosecond pulse generation are described. The enabling laser technologies are reviewed from chirped-pulse amplification and carrier-envelope-phase stabilization to the generation and characterization of attosecond pulses. The applications of attosecond pulses and pulse trains in electron- or ion-imaging experiments are presented, followed by attosecond electron spectroscopy in larger molecules. After this, high-harmonic spectroscopy and its applications to probing charge migration on attosecond time scales is reviewed. The rapidly evolving field of molecular photoionization delays is discussed. Finally, the applications of attosecond transient absorption to probing molecular dynamics are presented. article_processing_charge: No author: - first_name: Denitsa Rangelova full_name: Baykusheva, Denitsa Rangelova id: 71b4d059-2a03-11ee-914d-dfa3beed6530 last_name: Baykusheva - first_name: Hans Jakob full_name: Wörner, Hans Jakob last_name: Wörner citation: ama: 'Baykusheva DR, Wörner HJ. Attosecond Molecular Dynamics and Spectroscopy. In: Marquardt R, Quack M, eds. Molecular Spectroscopy and Quantum Dynamics. 1st ed. Elsevier; 2020:113-161. doi:10.1016/b978-0-12-817234-6.00009-x' apa: Baykusheva, D. R., & Wörner, H. J. (2020). Attosecond Molecular Dynamics and Spectroscopy. In R. Marquardt & M. Quack (Eds.), Molecular Spectroscopy and Quantum Dynamics (1st ed., pp. 113–161). Elsevier. https://doi.org/10.1016/b978-0-12-817234-6.00009-x chicago: Baykusheva, Denitsa Rangelova, and Hans Jakob Wörner. “Attosecond Molecular Dynamics and Spectroscopy.” In Molecular Spectroscopy and Quantum Dynamics, edited by Roberto Marquardt and Martin Quack, 1st ed., 113–61. Elsevier, 2020. https://doi.org/10.1016/b978-0-12-817234-6.00009-x. ieee: D. R. Baykusheva and H. J. Wörner, “Attosecond Molecular Dynamics and Spectroscopy,” in Molecular Spectroscopy and Quantum Dynamics, 1st ed., R. Marquardt and M. Quack, Eds. Elsevier, 2020, pp. 113–161. ista: 'Baykusheva DR, Wörner HJ. 2020.Attosecond Molecular Dynamics and Spectroscopy. In: Molecular Spectroscopy and Quantum Dynamics. , 113–161.' mla: Baykusheva, Denitsa Rangelova, and Hans Jakob Wörner. “Attosecond Molecular Dynamics and Spectroscopy.” Molecular Spectroscopy and Quantum Dynamics, edited by Roberto Marquardt and Martin Quack, 1st ed., Elsevier, 2020, pp. 113–61, doi:10.1016/b978-0-12-817234-6.00009-x. short: D.R. Baykusheva, H.J. Wörner, in:, R. Marquardt, M. Quack (Eds.), Molecular Spectroscopy and Quantum Dynamics, 1st ed., Elsevier, 2020, pp. 113–161. date_created: 2023-08-09T13:10:23Z date_published: 2020-09-25T00:00:00Z date_updated: 2024-10-14T12:26:39Z day: '25' doi: 10.1016/b978-0-12-817234-6.00009-x edition: '1' editor: - first_name: Roberto full_name: Marquardt, Roberto last_name: Marquardt - first_name: Martin full_name: Quack, Martin last_name: Quack extern: '1' language: - iso: eng month: '09' oa_version: None page: 113-161 publication: Molecular Spectroscopy and Quantum Dynamics publication_identifier: eisbn: - '0128172355' isbn: - '9780128172353' publication_status: published publisher: Elsevier quality_controlled: '1' scopus_import: '1' status: public title: Attosecond Molecular Dynamics and Spectroscopy type: book_chapter user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2020' ... --- _id: '14028' abstract: - lang: eng text: 'The present review addresses the technical advances and the theoretical developments to realize and rationalize attosecond-science experiments that reveal a new dynamical time scale (10−15-10−18 s), with a particular emphasis on molecular systems and the implications of attosecond processes for chemical dynamics. After a brief outline of the theoretical framework for treating non-perturbative phenomena in Section 2, we introduce the physical mechanisms underlying high-harmonic generation and attosecond technology. The relevant technological developments and experimental schemes are covered in Section 3. Throughout the remainder of the chapter, we report on selected applications in molecular attosecond physics, thereby addressing specific phenomena mediated by purely electronic dynamics: charge localization in molecular hydrogen, charge migration in biorelevant molecules, high-harmonic spectroscopy, and delays in molecular photoionization.' article_processing_charge: No arxiv: 1 author: - first_name: Denitsa Rangelova full_name: Baykusheva, Denitsa Rangelova id: 71b4d059-2a03-11ee-914d-dfa3beed6530 last_name: Baykusheva - first_name: Hans Jakob full_name: Wörner, Hans Jakob last_name: Wörner citation: ama: Baykusheva DR, Wörner HJ. Attosecond molecular spectroscopy and dynamics. doi:10.48550/arXiv.2002.02111 apa: Baykusheva, D. R., & Wörner, H. J. (n.d.). Attosecond molecular spectroscopy and dynamics. https://doi.org/10.48550/arXiv.2002.02111 chicago: Baykusheva, Denitsa Rangelova, and Hans Jakob Wörner. “Attosecond Molecular Spectroscopy and Dynamics,” n.d. https://doi.org/10.48550/arXiv.2002.02111. ieee: D. R. Baykusheva and H. J. Wörner, “Attosecond molecular spectroscopy and dynamics.” . ista: Baykusheva DR, Wörner HJ. Attosecond molecular spectroscopy and dynamics. 10.48550/arXiv.2002.02111. mla: Baykusheva, Denitsa Rangelova, and Hans Jakob Wörner. Attosecond Molecular Spectroscopy and Dynamics. doi:10.48550/arXiv.2002.02111. short: D.R. Baykusheva, H.J. Wörner, (n.d.). date_created: 2023-08-10T06:47:45Z date_published: 2020-02-01T00:00:00Z date_updated: 2023-08-22T09:17:34Z day: '01' doi: 10.48550/arXiv.2002.02111 extern: '1' external_id: arxiv: - '2002.02111' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.48550/arXiv.2002.02111 month: '02' oa: 1 oa_version: Preprint page: '2002.02111' publication_status: submitted status: public title: Attosecond molecular spectroscopy and dynamics type: preprint user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2020' ...