Showing 1–1 of 1 results for author: Ahn, K J

Theory of optically induced Förster Coupling in van der Waals coupled Heterostuctures

Authors: Malte Selig, Ermin Malic, Kwang Jun Ahn, Norbert Koch, Andreas Knorr

Abstract: 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… ▽ More 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 MoSe$_2$-graphene stack at room temperature. This timescale is in good agreement with the recently measured exciton lifetime in this heterostructure. △ Less

Submitted 1 March, 2019; originally announced March 2019.

Journal ref: Phys. Rev. B 99, 035420 (2019)