MSE Seminar Series Presents - Prof. Lan Yang

Tuesday, March 29, 2022 at 2:00pm to 3:00pm

Building 6, 6-104, Chipman Room
182 MEMORIAL DR (REAR), Cambridge, MA 02139

Title: Opportunities in optical microresonators: fundamentals and applications

Abstract: Light-matter interactions are the fundamental basis for many phenomena and processes in optical devices. This talk will cover ultra-high-quality whispering-gallery-mode (WGM) optical microresonators which provide an unprecedented capability to trap light in a highly confined volume smaller than a strand of human hair. Light beams can travel around the boundary of a WGM resonator over 10^6 times, significantly enhancing light-matter interactions, creating the potential for a wealth of new scientific discoveries and technological breakthroughs. 

High-Q microresonators and microlasers have great potential for both fundamental science and engineering applications; the choices of materials for the photonic resonators enable various opportunities for different applications. Examples range from low-threshold lasers to parity-time-symmetric resonators and their application for sensing and nonreciprocal light transmission. Our recent exploration of fundamental physics, such as light-matter interactions around exceptional points (EPs) in high-quality WGM resonators, unravels innovative strategies to achieve a new generation of optical systems enabling unconventional control of light flow. Examples including loss engineering in a lasing system, directional lasing emission, and EPs enhanced sensing will be presented. I will also reveal an interesting finding of mechanical solitons through optomechanical effects in a microtoroid resonator. The conclusion of this talk will discuss a barcode technology based on collective behaviors of multiple resonances for sensing applications.

Our research discoveries just represent a glimpse of the potentials of photonic resonators; there are still many exciting opportunities by leveraging the enhanced light-matter interactions through resonant effects in the future. 

Event Type

Conferences/Seminars/Lectures

Events By Interest

Academic, General

Events By Audience

MIT Community, Students, Alumni, Faculty, Staff

Events By School

School of Engineering (SoE)

Tags

engineering, Seminar, materials science

Group
Materials Science and Engineering Seminar Series
Department
Department of Materials Science and Engineering (DMSE)
Hashtag

#mseseminar

Contact Email

rkendall@mit.edu

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