Optical Physics of 2D Material Heterostructures

Date: 
Monday, October 29, 2018 -
4:00pm to 5:00pm
Speaker: 
John Schaibley
Speaker's Institution: 
University of Arizona

Since the discovery of graphene, there has tremendous interest in atomically-thin layered “2D” materials. My research group is interested in the fundamental optical and electronic physics of 2D materials and applications of this physics to new devices. I will review the optical physics of monolayer transition metal dichalcogenides (TMDs) such as MoS2 and WSe2. Monolayer TMDs are direct bandgap semiconductors with strongly bound excitons dominating their optical properties. I will explain how TMDs can be integrated into bilayer van der Waals heterostructures enabling spatially indirect excitons with tunable spin-valley physics. I will also discuss how TMDs can be integrated with metallic waveguide structures to investigate nonlinear plasmonics with atomically thin geometries.