Lecture 1 by Prof. Yun-Feng Xiao “Ultra-high-Q microcavity optics and photonics”
2019/4/25 9:30 am
State Key Laboratory of Transient Optics and Photonics meeting room
Yun-Feng Xiao
School of Physics, Peking University, P. R. China
Phone: +86-10-62765512, Fax: +86-10-62766567
e-mail: yfxiao@pku.edu.cn ; URL: www.phy.pku.edu.cn/~yfxiao/
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 (1) chaos-assisted momentum transformation in an asymmetrical microcavity, (2) spontaneous symmetry breaking of optical fields in a single ultrahigh-Q microcavity, and (3) second-order nonlinear optics induced by symmetry breaking at the surface of a silica microcavity under a sub-milliwatt continuous-wave pump.
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 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.
Lecture 2 by Prof. Chun-Hua Dong “Progress of microcavity optical frequency comb”
Chun-Hua Dong
CAS Key Lab of Quantum Information, University of Science and Technology of China, Hefei 230026, China
e-mail: chunhua@ustc.edu.cn ;
URL: http://dsxt.ustc.edu.cn/zj_js.asp?zzid=3907
This talk will present the frequency comb in the high-Q whispering gallery modes microresonator. The coherent temporal soliton in optical microresonators has attracted great attention recently. Here, we demonstrate the dissipative Kerr soliton generation in a microresonator, by utilizing an auxiliary-laser assisted thermal response control. By external tuning, the repetition rate of the soliton has been controlled over a large range of 30MHz. Our platform promises precise tuning and locking of the repetition frequency of coherent mode-locked comb in the microresonator, and holds great potential for applications in spectroscopy, quantum key distribution and precision measurements.
