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DTSTART;TZID=America/New_York:20240926T103000
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CREATED:20240902T210919Z
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SUMMARY:MSE Seminar: "Opportunities in Whispering-Gallery Microresonators: Fundamentals and Applications"
DESCRIPTION:Light-matter interactions form the fundamental basis for numerous phenomena and processes in optical devices. This talk will cover ultra-high-quality (Q) whispering-gallery-mode (WGM) optical microresonators which have an unprecedented capability to trap light in a highly confined volume smaller than a strand of human hair. Light-matter interactions are significantly enhanced in high-quality WGM resonators\, creating the potential for a wealth of new scientific discoveries and technological breakthroughs. High-Q microresonators and microlasers provide excellent platforms for both fundamental science and engineering applications; the choices of materials for the photonic resonators enable various opportunities for different applications. This talk will start with the introduction of diverse sensing mechanisms and strategies developed around high-Q microresonators. It will include discussions on ultra-sensitive self-referencing detection and sizing of nanoparticles\, including single virions. Various strategies\, such as mechanical solitons through optomechanical effects in a microtoroid resonator\, a barcode technology based on collective behaviors of multiple resonances\, and AI-enhanced target classification\, will be introduced for sensing applications with resonators. Furthermore\, our recent exploration of fundamental physics\, such as non-Hermitian physics in high-Q WGM resonators\, have unraveled innovative strategies to achieve a new generation of optical systems enabling unconventional control of light flow. Examples including nonreciprocity in a parity-time (PT)-symmetry resonator system\, loss engineering in a lasing system\, directional lasing emission at an exceptional point (EP)\, and EP-enhanced sensing will be presented. To conclude\, the applications of resonators in photonic integrated circuits (PIC) will be discussed. Our research discoveries just represent a glimpse of the potential of photonic resonators; there are still many exciting opportunities by leveraging the enhanced light-matter interactions through resonant effects in the future.
URL:https://seasevents.nmsdev7.com/event/mse-seminar-opportunities-in-whispering-gallery-microresonators-fundamentals-and-applications/
LOCATION:Wu and Chen Auditorium (Room 101)\, Levine Hall\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar
ORGANIZER;CN="Materials Science and Engineering":MAILTO:johnruss@seas.upenn.edu
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