# Electrically tuneable exciton energy exchange between spatially separated 2-dimensional semiconductors in a microcavity

## TL;DR

This paper demonstrates electrical control of exciton energy exchange between spatially separated 2D semiconductors within a microcavity at room temperature, enabling tunable polaritonic devices with potential technological applications.

## Contribution

It introduces a novel electrically tunable microcavity system with spatially separated 2D materials for controlling exciton-polaritons at room temperature.

## Key findings

- Electrical tuning modulates Rabi splitting significantly.
- Strong exciton-photon coupling achieved at room temperature.
- Spatial separation of monolayers allows independent control.

## Abstract

Electrical control over the energy exchange between exciton states mediated by cavity-polaritons at room temperature is demonstrated. Spatially separated field effect transistors based on monolayers of WS$_2$ and MoS$_2$ are placed in a tuneable Fabry-P\'erot microcavity. This device is specially designed for the formation of exciton-polaritons that combine the two exciton species and a tuneable cavity mode. It is further shown that the tuning of the free carrier density in the WS$_2$ film leads to a strong modulation of the Rabi splitting that modifies the excitonic and photonic nature of exciton-polaritons. Electrical control of polaritonic devices may lead to technological applications using switchable quantum states.