Driven Dipolariton Transistors in Y-shaped Channels

TL;DR

This paper explores the use of exciton-dipolaritons in TMD heterostructures as a basis for room-temperature optical transistors, demonstrating signal control in Y-shaped channels through applied voltages.

Contribution

It introduces a novel dipolariton transistor design utilizing TMD heterostructures and demonstrates control of dipolariton signals at room temperature.

Findings

Dipolaritons can be guided in Y-shaped channels.

Applying voltage controls signal redistribution.

Room-temperature operation is feasible.

Abstract

Exciton-dipolaritons are investigated as a platform for realizing working elements of a polaritronic transistor. Exciton-dipolaritons are three-way superposition of cavity photons, direct and indirect excitons in a bilayer semiconducting system embedded in an optical microcavity. Using the forced diffusion equation for dipolaritons, we study the room-temperature dynamics of dipolaritons in a transition metal dichalcogenide (TMD) heterogeneous bilayer. Specifically, we considered a MoSe$_2$-WS$_2$ heterostructure, where a Y-shaped channel guiding the dipolariton propagation is produced. We demonstrate that polaritronic signals can be redistributed in the channels by applying a driving voltage in an optimal direction. Our findings open a route towards the design of an efficient room-temperature dipolariton-based optical transistor.