报告题目：Ultrahigh-Q microcavity optics and photonics
报告时间：2026年3月5日 16:00
报告地点：物理楼W101
内容摘要：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 microcavity sensing mechanisms and their practical applications in single nanoparticle detection and identification.
报告人简介：Professor Yun-Feng Xiao is a New Cornerstone Investigator and Dean of the School of Physics at Peking University, where he also holds the title of Boya Distinguished Professor. He received his B.S. and Ph.D. degrees in Physics from the University of Science and Technology of China in 2002 and 2007, respectively. After completing postdoctoral research at Washington University in St. Louis, he joined the faculty of Peking University in 2009. Dr. Xiao has made seminal contributions to the physics and applications of optical microcavities. He has authored or co-authored over 200 peer-reviewed journal articles, including publications in Science, Nature Photonics, and Light: Science & Applications. He is a Fellow of Optica, SPIE, and COS. In addition, he serves as Co-Editor-in-Chief of Light: Science & Applications and is a standing council member of the Chinese Physical Society.
