Electrically controlled mutual interactions of flying waveguide dipolaritons

TL;DR

This paper demonstrates electrically tunable waveguided dipolaritons in quantum wells, enabling control over their properties and interactions, which paves the way for advanced polaritonic circuits and studies of correlated polariton gases.

Contribution

It introduces a system of electrically-gated wide quantum wells inside a dielectric waveguide to control and observe dipolaritons and their interactions.

Findings

Energy of dipolaritons can be tuned with local electrical gates.

Dipolariton excitation and extraction are achievable with simple metal gratings.

Electric fields can control interactions between polaritons and excitons.

Abstract

We show that with a system of electrically-gated wide quantum wells embedded inside a simple dielectric waveguide structure, it is possible to excite, control, and observe waveguided exciton polaritons that carry an electric dipole moment. We demonstrate that the energy of the propagating dipolariton can be easily tuned using local electrical gates, that their excitation and extraction can be easily done using simple evaporated metal gratings, and that the dipolar interactions between polaritons and between polaritons and excitons can also be controlled by the applied electric fields. This system of gated flying dipolaritons thus exhibit the ability to locally control both the single polariton properties as well as the interactions between polaritons, which should open up opportunities for constructing complex polaritonic circuits and for studying strongly-interacting, correlated polariton gases.