{"abstract":[{"text":"Recent discoveries have shown that, when two layers of van der Waals (vdW) materials are superimposed with a relative twist angle between them, the electronic properties of the coupled system can be dramatically altered. Here, we demonstrate that a similar concept can be extended to the optics realm, particularly to propagating phonon polaritons–hybrid light-matter interactions. To do this, we fabricate stacks composed of two twisted slabs of a vdW crystal (α-MoO3) supporting anisotropic phonon polaritons (PhPs), and image the propagation of the latter when launched by localized sources. Our images reveal that, under a critical angle, the PhPs isofrequency curve undergoes a topological transition, in which the propagation of PhPs is strongly guided (canalization regime) along predetermined directions without geometric spreading. These results demonstrate a new degree of freedom (twist angle) for controlling the propagation of polaritons at the nanoscale with potential for nanoimaging, (bio)-sensing, or heat management.","lang":"eng"}],"volume":20,"date_created":"2022-03-18T11:37:38Z","publication_status":"published","language":[{"iso":"eng"}],"publication":"Nano Letters","_id":"10866","scopus_import":"1","oa":1,"pmid":1,"day":"01","publisher":"American Chemical Society","department":[{"_id":"NanoFab"}],"isi":1,"user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","article_processing_charge":"No","oa_version":"Preprint","date_updated":"2023-09-05T12:05:58Z","status":"public","external_id":{"arxiv":["2004.14599"],"isi":["000548893200082"],"pmid":["32530634"]},"author":[{"full_name":"Duan, Jiahua","first_name":"Jiahua","last_name":"Duan"},{"full_name":"Capote-Robayna, Nathaniel","last_name":"Capote-Robayna","first_name":"Nathaniel"},{"full_name":"Taboada-Gutiérrez, Javier","first_name":"Javier","last_name":"Taboada-Gutiérrez"},{"full_name":"Álvarez-Pérez, Gonzalo","first_name":"Gonzalo","last_name":"Álvarez-Pérez"},{"full_name":"Prieto Gonzalez, Ivan","id":"2A307FE2-F248-11E8-B48F-1D18A9856A87","first_name":"Ivan","orcid":"0000-0002-7370-5357","last_name":"Prieto Gonzalez"},{"full_name":"Martín-Sánchez, Javier","last_name":"Martín-Sánchez","first_name":"Javier"},{"last_name":"Nikitin","first_name":"Alexey Y.","full_name":"Nikitin, Alexey Y."},{"last_name":"Alonso-González","first_name":"Pablo","full_name":"Alonso-González, Pablo"}],"issue":"7","acknowledgement":"J.T.-G. and G.Á.-P. acknowledge support through the Severo Ochoa Program from the\r\nGovernment of the Principality of Asturias (nos. PA-18-PF-BP17-126 and PA20-PF-BP19-053,\r\nrespectively). J. M-S acknowledges financial support through the Ramón y Cajal Program from\r\nthe Government of Spain (RYC2018-026196-I). A.Y.N. acknowledges the Spanish Ministry of\r\nScience, Innovation and Universities (national project no. MAT201788358-C3-3-R). P.A.-G.\r\nacknowledges support from the European Research Council under starting grant no. 715496,\r\n2DNANOPTICA.","doi":"10.1021/acs.nanolett.0c01673","article_type":"original","page":"5323-5329","type":"journal_article","intvolume":"        20","citation":{"ieee":"J. Duan <i>et al.</i>, “Twisted nano-optics: Manipulating light at the nanoscale with twisted phonon polaritonic slabs,” <i>Nano Letters</i>, vol. 20, no. 7. American Chemical Society, pp. 5323–5329, 2020.","ama":"Duan J, Capote-Robayna N, Taboada-Gutiérrez J, et al. Twisted nano-optics: Manipulating light at the nanoscale with twisted phonon polaritonic slabs. <i>Nano Letters</i>. 2020;20(7):5323-5329. doi:<a href=\"https://doi.org/10.1021/acs.nanolett.0c01673\">10.1021/acs.nanolett.0c01673</a>","short":"J. Duan, N. Capote-Robayna, J. Taboada-Gutiérrez, G. Álvarez-Pérez, I. Prieto Gonzalez, J. Martín-Sánchez, A.Y. Nikitin, P. Alonso-González, Nano Letters 20 (2020) 5323–5329.","mla":"Duan, Jiahua, et al. “Twisted Nano-Optics: Manipulating Light at the Nanoscale with Twisted Phonon Polaritonic Slabs.” <i>Nano Letters</i>, vol. 20, no. 7, American Chemical Society, 2020, pp. 5323–29, doi:<a href=\"https://doi.org/10.1021/acs.nanolett.0c01673\">10.1021/acs.nanolett.0c01673</a>.","apa":"Duan, J., Capote-Robayna, N., Taboada-Gutiérrez, J., Álvarez-Pérez, G., Prieto Gonzalez, I., Martín-Sánchez, J., … Alonso-González, P. (2020). Twisted nano-optics: Manipulating light at the nanoscale with twisted phonon polaritonic slabs. <i>Nano Letters</i>. American Chemical Society. <a href=\"https://doi.org/10.1021/acs.nanolett.0c01673\">https://doi.org/10.1021/acs.nanolett.0c01673</a>","ista":"Duan J, Capote-Robayna N, Taboada-Gutiérrez J, Álvarez-Pérez G, Prieto Gonzalez I, Martín-Sánchez J, Nikitin AY, Alonso-González P. 2020. Twisted nano-optics: Manipulating light at the nanoscale with twisted phonon polaritonic slabs. Nano Letters. 20(7), 5323–5329.","chicago":"Duan, Jiahua, Nathaniel Capote-Robayna, Javier Taboada-Gutiérrez, Gonzalo Álvarez-Pérez, Ivan Prieto Gonzalez, Javier Martín-Sánchez, Alexey Y. Nikitin, and Pablo Alonso-González. “Twisted Nano-Optics: Manipulating Light at the Nanoscale with Twisted Phonon Polaritonic Slabs.” <i>Nano Letters</i>. American Chemical Society, 2020. <a href=\"https://doi.org/10.1021/acs.nanolett.0c01673\">https://doi.org/10.1021/acs.nanolett.0c01673</a>."},"date_published":"2020-07-01T00:00:00Z","keyword":["Mechanical Engineering","Condensed Matter Physics","General Materials Science","General Chemistry","Bioengineering"],"quality_controlled":"1","title":"Twisted nano-optics: Manipulating light at the nanoscale with twisted phonon polaritonic slabs","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/2004.14599"}],"publication_identifier":{"eissn":["1530-6992"],"issn":["1530-6984"]},"month":"07","year":"2020"}