專題演講

2020/10/29(Thu)     11:00 -12:00    五樓第一會議室5th Floor(1st meeting room)

Title

Exploring Two-dimensional Materials through Optical Spectroscopy

Speaker

Dr. Jason Shih An Horng

Physics Department, University of Michigan

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.