Polariton based optical switching devices in TMDC's: A comparative analysis between Ψ-shaped and Y-shaped channel guides for switching device optimization.

Using the Langevin equation, we numerically model the stochastic diffusive dynamics of a dipolariton gas in an optical microcavity with a MoSe₂-WS₂ TMDC bilayer. The dipolariton particles, which are a three way mixture of direct exciton, indirect exciton and photon, are considered to be confined in a Ψ-shaped channel guide (with and without a buffer branch) as well as a Y-shaped channel guide. By variance of channel parameters such as electric field angle and electric driving force, we are able to study the resulting dipolariton branch redistributions. We are able to attain performances of >90% in both channel geometries for particular channel parameters, whilst making comparative analyses between the two varying channel geometries. Our results open the route towards the development of room temperature based optical switching devices for various channel guide geometries.