{"605396":{"#nid":"605396","#data":{"type":"event","title":"Ph.D. Dissertation Defense - Razi Dehghannasiri","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ETitle\u003C\/strong\u003E\u003Cem\u003E:\u0026nbsp; \u003C\/em\u003E\u003Cem\u003EHypersonic Phononic Crystal Structures for Integrated Nano-electromechanical\/Optomechanical Devices\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Ali Adibi, ECE, Chair , Advisor\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Stephen Ralph, ECE\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Levent Degertekin, ECE\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Gee-Kung Chang, ECE\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Massimo Ruzzene, AE\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract: \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIntegrated phononic devices fabricated on silicon chips are of great interest for diverse scientific and industrial applications including on-chip RF-photonics applications when co-integrated with optical devices as well as integrated nano\/micro-electromechanical systems for on-chip sensing and RF signal processing. This dissertation presents the realization of such integrated phononic devices in new CMOS-compatible platforms in the form of phononic crystal (PnC) structures (i.e., periodic structures supporting phononic bandgaps) and double-layer structures. These phononic structures have a higher efficiency and lower phononic\/photonic losses. In particular, I will present the experimental study of the developed hypersonic pillar-based PnC platform with wideband phononic bandgaps for enabling novel surface acoustic wave devices on CMOS-compatible AlN-on-Si substrates. In addition, I will present novel membrane PnC structures in silicon nitride for efficient stimulated Brillouin scattering in structures compatible with integrated optics platforms for RF-photonics applications. I will also present optomechanical resonators fabricated in the double-layer crystalline Si platforms for enabling on-chip RF oscillators (with no external electric feedback) as well as wide-band high-speed integrated optical switches.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Hypersonic Phononic Crystal Structures for Integrated Nano-electromechanical\/Optomechanical Devices "}],"uid":"28475","created_gmt":"2018-04-20 20:47:46","changed_gmt":"2018-04-23 16:45:01","author":"Daniela Staiculescu","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2018-05-03T11:00:00-04:00","event_time_end":"2018-05-03T13:00:00-04:00","event_time_end_last":"2018-05-03T13:00:00-04:00","gmt_time_start":"2018-05-03 15:00:00","gmt_time_end":"2018-05-03 17:00:00","gmt_time_end_last":"2018-05-03 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"434381","name":"ECE Ph.D. Dissertation Defenses"}],"categories":[],"keywords":[{"id":"100811","name":"Phd Defense"},{"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":""}}}