{"661623":{"#nid":"661623","#data":{"type":"event","title":"Resonances for Spatially Distributed Emitters","body":[{"value":"\u003Ch6\u003EGeorgia Electronic Design Center Distinguished Lecture Series\u003C\/h6\u003E\r\n\r\n\u003Ch4\u003EResonances for Spatially Distributed Emitters\u003C\/h4\u003E\r\n\r\n\u003Cdiv\u003ELocation: Coda, The Atrium - 9th floor\u003C\/div\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EFeaturing Steven Johnson, Professor of Applied Mathematics and Physics, MIT\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E It\u0026rsquo;s well known that a resonant cavity can dramatically enhance light emission by a fluorescent particle, via the Purcell effect. A closely related enhancement occurs for ensembles of coherent or incoherent emitters, which arises in many circumstances: lasing, thermal emission, fluorescent media, Raman scattering in fluids, scattering by surface roughness, and even darkmatter axion haloscopes. However, such \u0026ldquo;distributed\u0026rdquo; emission problems favor quite different resonant geometries, in part because the role of corner singularities is upended by spatial averaging. Moreover, even though distributed-emission problems tend to be naturally translation invariant, the process of seeking an optimal emission-enhancing geometry leads to spontaneous symmetry breaking. Theoretically, new tools are becoming available to reveal the possible behaviors and upper bounds of light\u0026ndash;matter interactions in complex nanostructured geometries. Computationally, the modeling of such systems naively involves an ensemble average of a large number of expensive electromagnetic simulations, but new trace-optimization algorithms now make it possible to perform large-scale \u0026ldquo;inverse design\u0026rdquo; of distributed emission over thousands of degrees of freedom.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EBiography: Steven G. Johnson is a Professor of Applied Mathematics and Physics at MIT. He works in the field of nanophotonics\u0026mdash;electromagnetism in media structured on the\u0026nbsp; wavelength scale, especially in the infrared and optical regimes\u0026mdash;where he works on many\u0026nbsp; aspects of the theory, design, and computational modeling of nanophotonic devices, both\u0026nbsp; classical and quantum. He is coauthor of over 200 papers and over 25 patents, including the\u0026nbsp; second edition of the textbook Photonic Crystals: Molding the Flow of Light. In addition to\u0026nbsp; traditional publications, he distributes several widely used free-software packages for\u0026nbsp; scientific computation, including the MPB and Meep electromagnetic simulation tools and\u0026nbsp; the FFTW fast Fourier transform library (for which he received the 1999 J. H. Wilkinson Prize\u0026nbsp; for Numerical Software).\u003C\/p\u003E\r\n\r\n\u003Ch6\u003EPizza and soda will be available post seminar.\u003C\/h6\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EFeaturing Steven Johnson, Professor of Applied Mathematics and Physics, MIT\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"Featuring Steven Johnson, Professor of Applied Mathematics and Physics, MIT"}],"uid":"34528","created_gmt":"2022-09-28 15:32:04","changed_gmt":"2022-09-28 15:36:54","author":"jhunt7","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2022-10-11T12:15:00-04:00","event_time_end":"2022-10-11T13:15:00-04:00","event_time_end_last":"2022-10-11T13:15:00-04:00","gmt_time_start":"2022-10-11 16:15:00","gmt_time_end":"2022-10-11 17:15:00","gmt_time_end_last":"2022-10-11 17:15:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"hg_media":{"661625":{"id":"661625","type":"image","title":"Resonances for Spatially Distributed Emitters","body":null,"created":"1664379400","gmt_created":"2022-09-28 15:36:40","changed":"1664379400","gmt_changed":"2022-09-28 15:36:40","alt":"","file":{"fid":"250608","name":"10.11.2022-GEDC-Dist-Lecture-Digital-Signage.jpg","image_path":"\/sites\/default\/files\/images\/10.11.2022-GEDC-Dist-Lecture-Digital-Signage.jpg","image_full_path":"http:\/\/www.tlwarc.hg.gatech.edu\/\/sites\/default\/files\/images\/10.11.2022-GEDC-Dist-Lecture-Digital-Signage.jpg","mime":"image\/jpeg","size":417623,"path_740":"http:\/\/www.tlwarc.hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/10.11.2022-GEDC-Dist-Lecture-Digital-Signage.jpg?itok=TSfT0pmH"}}},"media_ids":["661625"],"groups":[{"id":"1278","name":"College of Sciences"},{"id":"1279","name":"School of Mathematics"},{"id":"126011","name":"School of Physics"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"177814","name":"Postdoc"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003EHosted by \u003Ca href=\u0022https:\/\/research.gatech.edu\/stephen-ralph\u0022\u003EStephen E. Ralph\u003C\/a\u003E and \u003Ca href=\u0022https:\/\/www.ece.gatech.edu\/faculty-staff-directory\/nima-ghalichechian\u0022\u003ENima Ghalichechian\u003C\/a\u003E\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}