[{"month":"06","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/2001.09951"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","doi":"10.1088/1361-6455/ab8e56","extern":"1","abstract":[{"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.","lang":"eng"}],"publication_status":"published","date_published":"2020-06-17T00:00:00Z","status":"public","day":"17","date_updated":"2023-08-22T07:36:36Z","oa_version":"Preprint","issue":"14","arxiv":1,"oa":1,"language":[{"iso":"eng"}],"article_processing_charge":"No","date_created":"2023-08-09T13:09:51Z","publication_identifier":{"issn":["0953-4075"],"eissn":["1361-6455"]},"volume":53,"title":"Attosecond synchronization of extreme ultraviolet high harmonics from crystals","article_type":"original","external_id":{"arxiv":["2001.09951"]},"publication":"Journal of Physics B: Atomic, Molecular and Optical Physics","year":"2020","intvolume":"        53","publisher":"IOP Publishing","type":"journal_article","quality_controlled":"1","scopus_import":"1","article_number":"144003","keyword":["Condensed Matter Physics","Atomic and Molecular Physics","and Optics"],"citation":{"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.” <i>Journal of Physics B: Atomic, Molecular and Optical Physics</i>. IOP Publishing, 2020. <a href=\"https://doi.org/10.1088/1361-6455/ab8e56\">https://doi.org/10.1088/1361-6455/ab8e56</a>.","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. <i>Journal of Physics B: Atomic, Molecular and Optical Physics</i>. IOP Publishing. <a href=\"https://doi.org/10.1088/1361-6455/ab8e56\">https://doi.org/10.1088/1361-6455/ab8e56</a>","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).","ama":"Vampa G, Lu J, You YS, et al. Attosecond synchronization of extreme ultraviolet high harmonics from crystals. <i>Journal of Physics B: Atomic, Molecular and Optical Physics</i>. 2020;53(14). doi:<a href=\"https://doi.org/10.1088/1361-6455/ab8e56\">10.1088/1361-6455/ab8e56</a>","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.","ieee":"G. Vampa <i>et al.</i>, “Attosecond synchronization of extreme ultraviolet high harmonics from crystals,” <i>Journal of Physics B: Atomic, Molecular and Optical Physics</i>, vol. 53, no. 14. IOP Publishing, 2020.","mla":"Vampa, Giulio, et al. “Attosecond Synchronization of Extreme Ultraviolet High Harmonics from Crystals.” <i>Journal of Physics B: Atomic, Molecular and Optical Physics</i>, vol. 53, no. 14, 144003, IOP Publishing, 2020, doi:<a href=\"https://doi.org/10.1088/1361-6455/ab8e56\">10.1088/1361-6455/ab8e56</a>."},"_id":"13998","author":[{"first_name":"Giulio","last_name":"Vampa","full_name":"Vampa, Giulio"},{"first_name":"Jian","last_name":"Lu","full_name":"Lu, Jian"},{"last_name":"You","first_name":"Yong Sing","full_name":"You, Yong Sing"},{"first_name":"Denitsa Rangelova","last_name":"Baykusheva","id":"71b4d059-2a03-11ee-914d-dfa3beed6530","full_name":"Baykusheva, Denitsa Rangelova"},{"last_name":"Wu","first_name":"Mengxi","full_name":"Wu, Mengxi"},{"last_name":"Liu","first_name":"Hanzhe","full_name":"Liu, Hanzhe"},{"full_name":"Schafer, Kenneth J","last_name":"Schafer","first_name":"Kenneth J"},{"full_name":"Gaarde, Mette B","last_name":"Gaarde","first_name":"Mette B"},{"last_name":"Reis","first_name":"David A","full_name":"Reis, David A"},{"first_name":"Shambhu","last_name":"Ghimire","full_name":"Ghimire, Shambhu"}]},{"day":"15","oa":1,"language":[{"iso":"eng"}],"arxiv":1,"date_updated":"2023-08-22T08:32:43Z","oa_version":"Preprint","issue":"7","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","doi":"10.1088/1361-6455/aa62b5","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/1611.09352"}],"month":"03","status":"public","date_published":"2017-03-15T00:00:00Z","extern":"1","publication_status":"published","abstract":[{"text":"In a recent article by Hockett et al (2016 J. Phys. B: At. Mol. Opt. Phys. 49 095602), time delays arising in the context of molecular single-photon ionization are investigated from a theoretical point of view. We argue that one of the central equations given in this article is incorrect and present a reformulation that is consistent with the established treatment of angle-dependent scattering delays (Eisenbud 1948 PhD Thesis Princeton University; Wigner 1955 Phys. Rev. 98 145–7; Smith 1960 Phys. Rev. 118 349–6; Nussenzveig 1972 Phys. Rev. D 6 1534–42).","lang":"eng"}],"type":"journal_article","publisher":"IOP Publishing","intvolume":"        50","_id":"14007","author":[{"first_name":"Denitsa Rangelova","last_name":"Baykusheva","id":"71b4d059-2a03-11ee-914d-dfa3beed6530","full_name":"Baykusheva, Denitsa Rangelova"},{"first_name":"Hans Jakob","last_name":"Wörner","full_name":"Wörner, Hans Jakob"}],"keyword":["Condensed Matter Physics","Atomic and Molecular Physics","and Optics"],"citation":{"short":"D.R. Baykusheva, H.J. Wörner, Journal of Physics B: Atomic, Molecular and Optical Physics 50 (2017).","apa":"Baykusheva, D. R., &#38; Wörner, H. J. (2017). Comment on ‘Time delays in molecular photoionization.’ <i>Journal of Physics B: Atomic, Molecular and Optical Physics</i>. IOP Publishing. <a href=\"https://doi.org/10.1088/1361-6455/aa62b5\">https://doi.org/10.1088/1361-6455/aa62b5</a>","chicago":"Baykusheva, Denitsa Rangelova, and Hans Jakob Wörner. “Comment on ‘Time Delays in Molecular Photoionization.’” <i>Journal of Physics B: Atomic, Molecular and Optical Physics</i>. IOP Publishing, 2017. <a href=\"https://doi.org/10.1088/1361-6455/aa62b5\">https://doi.org/10.1088/1361-6455/aa62b5</a>.","mla":"Baykusheva, Denitsa Rangelova, and Hans Jakob Wörner. “Comment on ‘Time Delays in Molecular Photoionization.’” <i>Journal of Physics B: Atomic, Molecular and Optical Physics</i>, vol. 50, no. 7, 078002, IOP Publishing, 2017, doi:<a href=\"https://doi.org/10.1088/1361-6455/aa62b5\">10.1088/1361-6455/aa62b5</a>.","ieee":"D. R. Baykusheva and H. J. Wörner, “Comment on ‘Time delays in molecular photoionization,’” <i>Journal of Physics B: Atomic, Molecular and Optical Physics</i>, vol. 50, no. 7. IOP Publishing, 2017.","ista":"Baykusheva DR, Wörner HJ. 2017. Comment on ‘Time delays in molecular photoionization’. Journal of Physics B: Atomic, Molecular and Optical Physics. 50(7), 078002.","ama":"Baykusheva DR, Wörner HJ. Comment on ‘Time delays in molecular photoionization.’ <i>Journal of Physics B: Atomic, Molecular and Optical Physics</i>. 2017;50(7). doi:<a href=\"https://doi.org/10.1088/1361-6455/aa62b5\">10.1088/1361-6455/aa62b5</a>"},"quality_controlled":"1","article_number":"078002","scopus_import":"1","publication_identifier":{"eissn":["1361-6455"],"issn":["0953-4075"]},"article_processing_charge":"No","date_created":"2023-08-10T06:36:29Z","publication":"Journal of Physics B: Atomic, Molecular and Optical Physics","year":"2017","volume":50,"article_type":"letter_note","title":"Comment on ‘Time delays in molecular photoionization’","external_id":{"arxiv":["1611.09352"]}},{"oa":1,"language":[{"iso":"eng"}],"issue":"12","oa_version":"Preprint","date_updated":"2023-08-22T09:04:30Z","arxiv":1,"day":"10","date_published":"2014-06-10T00:00:00Z","status":"public","abstract":[{"text":"We present the detailed analysis of a new two-pulse orientation scheme that achieves macroscopic field-free orientation at the high particle densities required for attosecond and high-harmonic spectroscopies (Kraus et al 2013 arXiv:1311.3923). Carbon monoxide molecules are oriented by combining one-colour and delayed two-colour non-resonant femtosecond laser pulses. High-harmonic generation is used to probe the oriented wave-packet dynamics and reveals that a very high degree of orientation (Nup/Ntotal = 0.73–0.82) is achieved. We further extend this approach to orienting carbonyl sulphide molecules. We show that the present two-pulse scheme selectively enhances orientation created by the hyperpolarizability interaction whereas the ionization-depletion mechanism plays no role. We further control and optimize orientation through the delay between the one- and two-colour pump pulses. Finally, we demonstrate a complementary encoding of electronic-structure features, such as shape resonances, in the even- and odd-harmonic spectrum. The achieved progress makes two-pulse field-free orientation an attractive tool for a broad class of time-resolved measurements.","lang":"eng"}],"publication_status":"published","extern":"1","doi":"10.1088/0953-4075/47/12/124030","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","month":"06","main_file_link":[{"url":"https://arxiv.org/abs/1311.3923","open_access":"1"}],"author":[{"last_name":"Kraus","first_name":"P M","full_name":"Kraus, P M"},{"first_name":"Denitsa Rangelova","last_name":"Baykusheva","id":"71b4d059-2a03-11ee-914d-dfa3beed6530","full_name":"Baykusheva, Denitsa Rangelova"},{"full_name":"Wörner, H J","first_name":"H J","last_name":"Wörner"}],"_id":"14021","scopus_import":"1","article_number":"124030","quality_controlled":"1","citation":{"apa":"Kraus, P. M., Baykusheva, D. R., &#38; Wörner, H. J. (2014). Two-pulse orientation dynamics and high-harmonic spectroscopy of strongly-oriented molecules. <i>Journal of Physics B: Atomic, Molecular and Optical Physics</i>. IOP Publishing. <a href=\"https://doi.org/10.1088/0953-4075/47/12/124030\">https://doi.org/10.1088/0953-4075/47/12/124030</a>","short":"P.M. Kraus, D.R. Baykusheva, H.J. Wörner, Journal of Physics B: Atomic, Molecular and Optical Physics 47 (2014).","chicago":"Kraus, P M, Denitsa Rangelova Baykusheva, and H J Wörner. “Two-Pulse Orientation Dynamics and High-Harmonic Spectroscopy of Strongly-Oriented Molecules.” <i>Journal of Physics B: Atomic, Molecular and Optical Physics</i>. IOP Publishing, 2014. <a href=\"https://doi.org/10.1088/0953-4075/47/12/124030\">https://doi.org/10.1088/0953-4075/47/12/124030</a>.","ieee":"P. M. Kraus, D. R. Baykusheva, and H. J. Wörner, “Two-pulse orientation dynamics and high-harmonic spectroscopy of strongly-oriented molecules,” <i>Journal of Physics B: Atomic, Molecular and Optical Physics</i>, vol. 47, no. 12. IOP Publishing, 2014.","mla":"Kraus, P. M., et al. “Two-Pulse Orientation Dynamics and High-Harmonic Spectroscopy of Strongly-Oriented Molecules.” <i>Journal of Physics B: Atomic, Molecular and Optical Physics</i>, vol. 47, no. 12, 124030, IOP Publishing, 2014, doi:<a href=\"https://doi.org/10.1088/0953-4075/47/12/124030\">10.1088/0953-4075/47/12/124030</a>.","ista":"Kraus PM, Baykusheva DR, Wörner HJ. 2014. Two-pulse orientation dynamics and high-harmonic spectroscopy of strongly-oriented molecules. Journal of Physics B: Atomic, Molecular and Optical Physics. 47(12), 124030.","ama":"Kraus PM, Baykusheva DR, Wörner HJ. Two-pulse orientation dynamics and high-harmonic spectroscopy of strongly-oriented molecules. <i>Journal of Physics B: Atomic, Molecular and Optical Physics</i>. 2014;47(12). doi:<a href=\"https://doi.org/10.1088/0953-4075/47/12/124030\">10.1088/0953-4075/47/12/124030</a>"},"keyword":["Condensed Matter Physics","Atomic and Molecular Physics","and Optics"],"type":"journal_article","intvolume":"        47","publisher":"IOP Publishing","title":"Two-pulse orientation dynamics and high-harmonic spectroscopy of strongly-oriented molecules","article_type":"original","external_id":{"arxiv":["1311.3923"]},"volume":47,"year":"2014","publication":"Journal of Physics B: Atomic, Molecular and Optical Physics","date_created":"2023-08-10T06:38:48Z","article_processing_charge":"No","publication_identifier":{"eissn":["1361-6455"],"issn":["0953-4075"]}}]