專題演講

Title

Exploring Two-dimensional Materials through Optical Spectroscopy

Speaker

Dr. Jason Shih An Horng

Physics Department, University of Michigan

Hosted by

溫昱傑 助研究員 (Assistant Research Fellow Wen,Yu-Chieh)

Abstract

Since the discovery of graphene, layered van der Waals materials have drawn significant attention in condensed matter physics as well as electro-optical applications due to their strong light-matter interactions in the two-dimensional limit. Monolayer transition metal dichalcogenides (TMDs) exhibits tightly bound excitons with low scattering loss, providing an ideal platform to study manybody physics. In this talk, I will present our studies on collective excitonic phenomena in TMDs through various optical spectroscopy, including controlling exciton dynamics through photonic engineering and the observation of bi-excitonic transitions through the optical Stark effect. At last, I will demonstrate a versatile optical imaging technique for bio-electricity detection using the high sensitivity from graphene.