报告题目:Interlayer excitons in van der Waals heterostructures: fundamentals and applications

报告人：肖三水 副教授 (丹麦科技大学)

报告时间：2023年12月25日 (周一上午) 10: 00-11: 30

报告地点：理A110

摘要：The appearance of the moiré period resulting from stacking atomic thin layers with rotational misalignment and/or lattice mismatch creates moiré superlattices, which have emerged as a unique platform for exploring novel physics, e.g., superconductor in the magic-angle superlattice, correlated insulator, and exciton localization. The formation of periodic energy potential traps in such a system strongly modulates existing excitonic states and their transport properties even at room temperature. I will first give a brief overview of recent activities/highlights in our group, e.g., graphene based silicon ring-resonator modulators, graphene plasmonic waveguide modulators, and graphene plasmonic waveguide photodetector. Then, I will mainly discuss two recent projects: (1) localization and interaction of interlayer excitons in MoSe2/WSe2 heterobilayers: addressing different trap mechanisms.  (2) observation of room-temperature moiré exciton in the MoS2/WSe2 system, the impact of moiré potential on excitonic light emission, and potential application for lasing at optical fiber communication O-band.

报告人简介：肖三水，2004年获得浙江大学博士，同年加入瑞典皇家工学院做博士后研究，2006年加入丹麦科技大学，现在是丹麦科技大学副教授（tenure）。他目前主要的研究方向是研究微纳尺寸下光跟物质的相互作用以及基于二维材料的新型光电子器件。他于2008年获得欧洲光学学会奖，担任美国光学协会应用光学的责任主编。

邀请人： 沈林放