应物理科学与技术学和萃英学院邀请，北京大学肖云峰教授来我院交流，并做学术报告，届时欢迎广大师生参加！

主讲人：肖云峰 教授

题目：Ultra-high-Q asymmetric microcavity optics and photonics

时间：2020年11月12日上午08:30

地点：格致楼4022

联系人：黄亮

摘要：Confinement and manipulation of photons using microcavities have triggered intense research interest in both fundamental and applied photonics for more than two decades. Prominent examples are ultrahigh-Q whispering gallery microcavities which confine photons by means of continuous total internal reflection along a curved and smooth surface. The long photon lifetime, strong field confinement, and in-plane emission characteristics make them promising candidates for enhancing light-matter interactions on a chip. In the first part of this talk, I will introduce some representative photonics applications of ultrahigh-Q microcavities. In the second part, I will focus on a new type of on-chip whispering gallery microcavity which supports both highly asymmetric far-field patterns and ultra-high-Q factors exceeding 100 million. These microcavities not only offer highly directional emission and ultra-broadband coupling desired for various important applications, but also hold great potential to test classical and quantum chaos because they behave like open billiard systems.

简介：Dr. Yun-Feng Xiao received the B.S. and Ph.D. degrees in physics from University of Science and Technology of China in 2002 and 2007, respectively. After a postdoctoral research at Washington University in St. Louis, he joined the faculty of Peking University in 2009, and was promoted a tenured professor in 2014 and a full professor in 2019. His research interests lie in the fields of whispering-gallery microcavity optics and photonics. He has authored or co-authored more than 150 refereed journal papers in Science, Nature Photonics, PNAS, PRL, Advanced Materials et al. He has delivered over 100 plenary/keynote/invited talks/seminars in international/national conferences/universities. He is an OSA Fellow, and has served as the committee for more than 30 international conferences.