Dipolariton propagation in a van der Waals TMDC with {\Psi}-shaped channel guides and buffered channel branches

TL;DR

This paper uses computational simulations to study how dipolaritons propagate in a TMDC-based microcavity with complex channel guides, demonstrating potential for room-temperature optical routing and control.

Contribution

It introduces a computational model for dipolariton dynamics in TMDC heterostructures with { extbackslash Psi}-shaped channels, exploring electric and structural control of their propagation.

Findings

Dipolaritons can be effectively guided in { extbackslash Psi}-shaped channels.

Buffer regions influence propagation efficiency.

Optimal system parameters include a driving force of ~2.0 eV/mm and a 60-degree electric field angle.

Abstract

Using a computational approach based on the driven diffusion equation for dipolariton wave packets, we simulate the diffusive dynamics of dipolaritons in an optical microcavity embedded with a transition-metal dichalcogenide (TMDC) heterogeneous bilayer encompassing a {\Psi}-shaped channel. By considering exciton-dipolaritons, which are a three way superposition of direct excitons, indirect excitons and cavity photons, we are able to drive the dipolaritons in our system by the use of an electric voltage and investigate their diffusive properties. More precisely, we study the propagation of dipolaritons present in a MoSe2-WS2 heterostructure, where the dipolariton propagation is guided by a {\Psi}-shaped channel. We also consider the propagation of dipolaritons in the presence of a buffer in the {\Psi}-shaped channel and study resulting changes in efficiency. We introduce designs for optical routers at room temperature as well as show that system parameters including driving forces of ~2.0eV/mm and electric field angles of sixty degrees optimize the dipolariton redistribution efficiencies in our channel guide.