时间：2022年1月18日（周二） 09:00-10:30

Time: 09:00-10:30, Tuesday, January 18th, 2022

主持人: 西湖大学理学院讲席教授 Alexey Kavokin 博士

Host: Prof. Alexey Kavokin, Chair Professor of School of Science, Westlake University

地点：西湖大学云栖校区4号楼311会议室

Venue: Room 311, Building 4, Yunqi Campus

线上：Zoom会议 ID：811 4539 9638 密码：202201

Online：Zoom Meeting ID: 811 4539 9638 Password: 202201

主讲嘉宾/Speaker：

Prof. Hui Deng

Professor of Physics, 

University of Michigan, Ann Arbor

主讲人简介/Biography:

Professor Deng obtained her PhD degree from Stanford University in 2006. After a postdoc at the California Institute of Technology, she joined the University of Michigan, Ann Arbor in 2008 and is currently a professor in physics. Her research interest lies in the creation, control, and application of single-, few-, and many-body quantum states in matter-light coupled systems. Her current efforts focus on GaAs polaritons and 2D semiconductors. She is a recipient of the NSF CAREER, AFOSR YIP and Humboldt Foundation’s Frederich William Bessel Award. She is a fellow of APS and OSA. 

讲座摘要/Abstract:

Van der Waals semiconductors provide a platform for creating two-dimensional crystals layer-by-layer and engineering excitonic states therein with exceptional properties. As moiré lattice form in a heterobilayer, carriers can tunnel between closely-aligned bands in the two neighboring monolayers, leading to hybrid states that combine a large oscillator strength similar to intra-layer excitons and tunability of inter-layer ones. Such hybrid states are manifestations of the formation of moiré lattices. When coupled to cavities, the quantum confined nature of excitons in each moiré cell manifests as strong polariton nonlinearity, providing a potentially highly tunable system for ultra-low-power optoelectronics and quantum polaritonics.

[1] L. Zhang, Z. Zhang, F. Wu, D. Wang, R. Gogna, S. Hou, K. Watanabe, T. Taniguchi, K. Kulkarni, T. Kuo, S. R. Forrest, and H. Deng, Nature Communications 11, 1 (2020).

[2] L. Zhang, F. Wu, S. Hou, Z. Zhang, Y.-H. Chou, K. Watanabe, T. Taniguchi, S. R. Forrest, and H. Deng, Nature 591, 7848 (2021).

讲座联系人/Contact:

理学院 陈老师 chenkeyu@westlake.edu.cn