博士论文答辩：非线性谐振腔中的非厄米和拓扑效应
日期：2023/05/18 - 2023/05/18
博士论文答辩：非线性谐振腔中的非厄米和拓扑效应
主讲人：Yao Chen, Ph.D. candidate at UM-SJTU Joint Institute
时间：2023年5月18日（周四）上午8:30
地点：密西根学院龙宾楼414A会议室
讲座摘要
Exceptional points (EPs), universally present in non-Hermitian systems, often reveal some critical behaviors like topological encircling chirality and ultrahigh enhanced sensing. However, most of the experimental realizations of EPs have been limited to the linear regime. Here we experimentally observe two distinct EPs with opposite hermiticities and demonstrate a parity-time (PT) phase transition with exotic memory effects near the EPs in a nonlinear and non-Hermitian system in an optical microcavity. This scheme completes the studies of non-Hermitian physics in a more general scenario by including nonlinearity and paves the way towards optical memory for all-optical signal processing and quantum information.
主讲人简介
Yao Chen received a B.E. degree in optoelectronic information science and engineering from Huazhong University of Science and Technology, Wuhan, China, in 2018. Since 2018, he has been working toward a Ph.D degree in Nonlinear Nano Photonics Laboratory, Shanghai Jiaotong University, China. His research interests include nonlinear microcavity and optical sensing.