Zero Dimensional Polariton Laser in a Sub-Wavelength Grating Based Vertical Microcavity

TL;DR

This paper demonstrates a novel hybrid microcavity with a sub-wavelength grating mirror that achieves full confinement of polaritons, enabling scalable polariton lasing and potential quantum photonic applications.

Contribution

It introduces a hybrid cavity design with a sub-wavelength grating mirror for non-destructive polariton confinement in a vertical microcavity.

Findings

Single-mode polariton lasing observed at specific polarization

Full confinement of polaritons achieved using hybrid cavity

Potential for scalable polariton-based quantum devices

Abstract

Semiconductor exciton-polaritons in planar microcavities form coherent two-dimensional condensates in non-equilibrium. However, coupling of multiple lower-dimensional polariton quantum systems, critically needed for polaritonic quantum device applications and novel cavity-lattice physics, has been limited due to the conventional cavity structures. Here we demonstrate full confinement of the polaritons non-destructively using a hybrid cavity made of a single-layer sub-wavelength grating mirror and a distributed Bragg reflector. Single-mode polariton lasing was observed at a chosen polarization. Incorporation of a designable slab mirror into the conventional vertical cavity, when operating in the strong-coupling regime, enables confinement, control and coupling of polariton gasses in a scalable fashion. It may open a door to experimental implementation of polariton-based quantum photonic devices and coupled cavity quantum electrodynamics systems.