{"643313":{"#nid":"643313","#data":{"type":"event","title":"Ph.D. Proposal Oral Exam - Sajjad Abdollahramezani","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ETitle:\u0026nbsp; \u003C\/strong\u003E\u003Cem\u003EDynamic Nanophotonic Structures Leveraging Chalcogenide Phase-change Materials\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u0026nbsp; \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Adibi, Advisor\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Cai, Chair\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Chang\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract: \u003C\/strong\u003EThe objective of the proposed research is the demonstration of adaptive photonic structures leveraging phase-change chalcogenides for active manipulation of optical wavefronts in the subwavelength regime. Accordingly, pure plasmonic, all-dielectric, and hybrid plasmonic-dielectric metasurfaces are realized to spectrally, spatially, and\/or temporally control the main properties of light with a high dynamic range. First, I explore and characterize the material properties of a well-established phase-change chalcogenide (i.e., germanium antimony telluride (GST)) serving as a functional material in the mainstream of dynamic phase-change nanophotonics. By investigating the underlying nature of fundamental plasmonic\/photonic modes supported by rationally engineered metasurfaces, I propose hybrid configurations enabling active tuning of the amplitude, phase, and polarization of light in a small form factor framework. I will investigate the realization of transparent micro\/nanoheaters for active tuning of emerged high bandgap phase-change metasurfaces at the pixel level. The existing challenges will be discussed, and potential solutions will be proposed by introducing new architectures or advancing the available state-of-the-art methods.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Dynamic Nanophotonic Structures Leveraging Chalcogenide Phase-change Materials"}],"uid":"28475","created_gmt":"2021-01-21 21:12:18","changed_gmt":"2021-01-21 21:12:18","author":"Daniela Staiculescu","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2021-01-29T09:00:00-05:00","event_time_end":"2021-01-29T11:00:00-05:00","event_time_end_last":"2021-01-29T11:00:00-05:00","gmt_time_start":"2021-01-29 14:00:00","gmt_time_end":"2021-01-29 16:00:00","gmt_time_end_last":"2021-01-29 16:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"434371","name":"ECE Ph.D. Proposal Oral Exams"}],"categories":[],"keywords":[{"id":"102851","name":"Phd proposal"},{"id":"1808","name":"graduate students"}],"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":""}}}