# Theory of optically induced F\"orster Coupling in van der Waals coupled Heterostuctures

## TL;DR

This paper models optically induced F"orster coupling in van der Waals heterostructures, predicting rapid energy transfer rates that align with experimental exciton lifetimes, advancing understanding of exciton dynamics in 2D materials.

## Contribution

It provides a theoretical framework for F"orster coupling in heterostructures, predicting dephasing and energy transfer rates consistent with experimental data.

## Key findings

- Dephasing rates and energy transfer times are in the picosecond range.
- Predicted transition rate of thermalized excitons is about 4 ps$^{-1}$ at room temperature.
- Theoretical results agree with recent experimental measurements.

## Abstract

We investigate the impact of optically induced F\"orster 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.