Dipolariton propagation in a van der Waals TMDC with Ψ-shaped channel guides and buffered channel branches

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 [Formula: see text]-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 [Formula: see text]-shaped channel. We also consider the propagation of dipolaritons in the presence of a buffer in the [Formula: see text]-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 [Formula: see text] eV/mm and electric field angles of [Formula: see text] optimize the dipolariton redistribution efficiencies in our channel guide.