{"689307":{"#nid":"689307","#data":{"type":"event","title":"PhD Defense by Martin Gomez Dominguez","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EMartin Gomez Dominguez\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EAdvisor: Prof. Juan-Pablo Correa-Baena\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cem\u003Ewill defend a doctoral thesis entitled\u003C\/em\u003E,\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EThe Role of Lattice Distortions in the Excitonic Fine Structure and Strong Light-Matter Coupling of Two-Dimensional Perovskites\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u003Cbr\u003E\u003Cem\u003EOn\u003C\/em\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EMonday, April 13th\u0026nbsp;\u0026nbsp;at 10 a.m.\u003C\/p\u003E\u003Cp\u003EPettit Microelectronics Room 102A\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EAnd virtually via Zoom\u003C\/p\u003E\u003Cp\u003E\u003Ca href=\u0022https:\/\/gatech.zoom.us\/j\/92878908653?pwd=Rc8Mo0DtomJ2O1bYrKaABivRrm6hBh.1\u0022\u003Ehttps:\/\/gatech.zoom.us\/j\/92878908653?pwd=Rc8Mo0DtomJ2O1bYrKaABivRrm6hBh.1\u003C\/a\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003ECommittee\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Prof. Juan-Pablo Correa-Baena \u2013 School of MSE, Georgia Institute of Technology (advisor)\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Prof. Natalie Stingelin \u2013 Schools of MSE \u0026amp; ChBE, Georgia Institute of Technology\u003C\/p\u003E\u003Cp\u003E\u2002\u2002\u2002\u2002\u2002\u2002Prof. Emma Hu \u2013 School of MSE,\u0026nbsp;Georgia Institute of Technology\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Prof. Vinod Menon \u2013 School of Physics, City University of New York\u003C\/p\u003E\u003Cp\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; Prof. Carlos Silva-Acu\u00f1a \u2013 School of Physics, Universit\u00e9 de Montr\u00e9al\u003C\/p\u003E\u003Cp\u003E\u2002\u2002\u2002\u2002\u2002\u2002Prof. Ajay Ram Srimath Kandada\u0026nbsp;\u2013 School of Physics, Wake Forest University\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003ETwo-dimensional (2D) hybrid organic-inorganic halide perovskites are semiconductors that host strongly confined excitons and exhibit optical properties well suited for studying light-matter interactions. Their large exciton binding energies, strong oscillator strengths, tunable optical response, and relatively low non-radiative recombination rates make them promising candidates for light-emitting devices such as lasers and LEDs. At the same time, they possess a soft, deformable lattice whose behavior depends strongly on chemical composition and crystallographic structure. However, the connection between structural distortions, chemical composition, and excited-state behavior in these materials remains incompletely understood. This thesis studies how changes in crystal structure, spacer-cation chemistry, and lattice dynamics can be used to tailor the optical properties of two-dimensional halide perovskites.\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EChapters 1 and 2 introduce lower-dimensional perovskites and strong light-matter coupling. Chapter 3 shows that the fine structure of the exciton reservoir can limit radiative pumping efficiency in PEA2PbI4\u0026nbsp;microcavities. Chapter 4 demonstrates that a spacer-cation substitution can modify the structural dynamics of the inorganic framework, inducing changes in exciton-phonon coupling and polaritonic response. Finally, chapter 5 explores the ultrafast structural response of two-dimensional perovskites after photoexcitation using time-resolved wide-angle X-ray scattering, revealing a transient out-of-plane lattice modulation. This thesis highlights the role of the crystallographic structure in determining the optical response of 2D perovskites.\u003C\/p\u003E","summary":"","format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EThe Role of Lattice Distortions in the Excitonic Fine Structure and Strong Light-Matter Coupling of Two-Dimensional Perovskites\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"The Role of Lattice Distortions in the Excitonic Fine Structure and Strong Light-Matter Coupling of Two-Dimensional Perovskites"}],"uid":"27707","created_gmt":"2026-04-01 13:48:47","changed_gmt":"2026-04-01 13:49:34","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"1969-12-31T19:00:00-05:00","event_time_end":"1969-12-31T19:00:00-05:00","event_time_end_last":"1969-12-31T19:00:00-05:00","gmt_time_start":"1970-01-01 00:00:00","gmt_time_end":"1970-01-01 00:00:00","gmt_time_end_last":"1970-01-01 00:00:00","rrule":null,"timezone":"America\/New_York"},"location":"Pettit Microelectronics Room 102A","extras":[],"groups":[{"id":"221981","name":"Graduate Studies"}],"categories":[],"keywords":[{"id":"100811","name":"Phd Defense"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78771","name":"Public"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}