Optical spectroscopy of excitons in 2D semiconductors

Currently, one of the main research topics in condensed matter physics deals with the electronic properties of atomically thin semiconductors based on transition metal dichalcogenides (TMD), such as MoS2 and WSe2. Their optical response is completely dominated by strongly bound excitons, whose strong coupling with light permits to study exciton and many body physics event at room temperature. In addition, their unique bandstructure provides the possibility to opically control the electron’s spin and momentum by
using circularly polarized light. In this talk, I will show how optical spectroscopy can provide very useful insights on the bandstructure of these 2D semiconductors.