{"id":8723,"date":"2024-04-30T16:34:16","date_gmt":"2024-04-30T13:34:16","guid":{"rendered":"https:\/\/unam.bilkent.edu.tr\/en\/?post_type=tribe_events&#038;p=8723"},"modified":"2024-04-30T16:34:37","modified_gmt":"2024-04-30T13:34:37","slug":"coherent-perfect-absorption-and-transmission-of-light","status":"publish","type":"tribe_events","link":"https:\/\/unam.bilkent.edu.tr\/en\/event\/coherent-perfect-absorption-and-transmission-of-light\/","title":{"rendered":"Coherent perfect absorption and transmission of light"},"content":{"rendered":"<h5>Stefan Rotter<\/h5>\n<p>TU Wien &#8211; Vienna University of Technology<\/p>\n<hr \/>\n<p><strong>Coherent perfect absorption and transmission of light<\/strong><\/p>\n<p>In my talk I will present two recent works focused on the perfect absorption and transmission of waves through interferometric cancellation of backscattering. In the first case [1], we demonstrate that even a weakly absorbing film can be turned into a \u201ccoherent perfect absorber\u201d by building a degenerate cavity around it. This special cavity perfectly couples incoming light fields with arbitrary wavefronts into the absorber \u2013 even for the case that light is a dynamically varying speckle pattern. In the second case [2], we demonstrate how to construct an anti-reflection structure for a complex scattering system like a disordered medium. Similar to an anti-reflection coating for conventional eye-glasses, this structure leads to perfect transmission across the scattering system by suppressing back-scattering for any incoming wavefront. If time permits, I will also say a few words about the topological origin of the above effects and how this aspect can be used to engineer thermal radiation [3].<\/p>\n<p>[1] Y. Slobodkin, G. Weinberg, H. H\u00f6rner, K. Pichler, S. Rotter, and O. Katz, Science 377, 995 (2022)<br \/>\n[2] M. Horodynski, M. K\u00fchmayer, C. Ferise, S. Rotter, and M. Davy, Nature 607, 281 (2022)<br \/>\n[3] M. S. Ergoktas, A. Kecebas, K. Despotelis, S. Soleymani, G. Bakan, A. Kocabas, A. Principi, S. Rotter, S. K. \u00d6zdemir, and C. Kocabas, arXiv:2401.08316<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-9281\" src=\"https:\/\/unam.bilkent.edu.tr\/tr\/wp-content\/uploads\/2024\/04\/abs-1.png\" alt=\"\" width=\"1541\" height=\"1158\" \/><\/p>\n<p>&nbsp;<\/p>\n<h3><strong>About speaker<\/strong><\/h3>\n<p>Stefan Rotter is professor at TU Wien\u2019s Institute for Theoretical Physics. After studies in Vienna and Lausanne, he obtained his Ph.D. in 2004, followed by a postdoctoral position at Yale University. His group was established in 2011 and focuses on non-Hermitian physics, theoretical quantum optics and on the propagation of classical or quantum waves through complex media. In all of these fields the Rotter group aims at identifying interesting new research directions and at exploring them in close collaboration with the experiment.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-9283\" src=\"https:\/\/unam.bilkent.edu.tr\/tr\/wp-content\/uploads\/2024\/04\/Stefan-Rotter.jpg\" alt=\"\" width=\"1754\" height=\"2480\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Stefan Rotter TU Wien &#8211; Vienna University of Technology Coherent perfect absorption and transmission of light In my talk I will present two recent works focused on the perfect absorption [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8724,"comment_status":"open","ping_status":"closed","template":"","meta":{"inline_featured_image":false,"_tribe_events_status":"","_tribe_events_status_reason":"","footnotes":""},"tags":[],"tribe_events_cat":[59],"class_list":["post-8723","tribe_events","type-tribe_events","status-publish","has-post-thumbnail","hentry","tribe_events_cat-nanocolloquium-series","cat_nanocolloquium-series"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.13 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Coherent perfect absorption and transmission of light - UNAM Nanoteknoloji Ara\u015ft\u0131rma Merkezi<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/unam.bilkent.edu.tr\/en\/event\/coherent-perfect-absorption-and-transmission-of-light\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Coherent perfect absorption and transmission of light - UNAM Nanoteknoloji Ara\u015ft\u0131rma Merkezi\" \/>\n<meta property=\"og:description\" content=\"Stefan Rotter TU Wien &#8211; 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