Talk given by

Prof. Alexander Högele

Nanophotonics Group

Ludwig-Maximilians-Universität München

München

Abstract:

Atomically thin semiconductors in the form of transition metal dichalcogenides have emerged 
recently as novel truly two-dimensional materials with remarkable opto-electronic properties. 
In response to an optical excitation, they host strongly bound electron-hole pairs, so-called 
excitons, with unique spin and valley degrees of freedom. 

In my presentation, I will give an introduction to the basic opto-valleytronic signatures of 
bright excitons in two-dimensional imaging and polarimetry, and highlight the role of dark 
excitons for optical responses of monolayer, bilayer and hetero-bilayer systems.