Theory of optically induced Förster coupling in van der Waals coupled heterostructures

Artikel i vetenskaplig tidskrift, 2019

We investigate the impact of optically induced Förster coupling in van der Waals heterostructures consisting of graphene and a monolayer transition-metal dichalcogenide (TMD). In particular, we predict the corresponding dephasing rates and a fast energy transfer between the TMD layer and graphene being in the picosecond range. Exemplary we find a transition rate of thermalized excitons of about 4 ps-1 in a MoSe2-graphene stack at room temperature. This time scale is in good agreement with the recently measured exciton lifetime in this heterostructure.