Controllable Bistability and Squeezing of Confined Polariton Dark Solitons

TL;DR

This paper theoretically explores how to generate and control squeezed light using polariton dark solitons in semiconductor microcavities, demonstrating bistability and squeezing near the turning point influenced by nonlinear interactions.

Contribution

It introduces a method to create and manipulate polariton dark solitons with controllable bistability and squeezing in microcavity systems, advancing solid-state quantum light sources.

Findings

Bistability of polariton dark solitons with different parities can be induced by tuning potential depth.

Strong intensity squeezing occurs near the bistability turning point due to nonlinear interactions.

Phase diagram of bistability and squeezing is mapped through large-scale numerical simulations.

Abstract

The generation of squeezed light in semiconductor materials opens opportunities for building on-chip devices that are operated at the quantum level. Here we study theoretically a squeezed light source of polariton dark solitons confined in a geometric potential well of semiconductor microcavities in the strong coupling regime. We show that polariton dark solitons of odd and even parities can be created by tuning the potential depth. When driving the potential depth linearly, a bistability of solitons with the two different parities can be induced. Strong intensity squeezing is obtained near the turning point of the bistability due to the large nonlinear interaction, which can be controlled by Feshbach resonance. The phase diagram of the bistability and squeezing of the dark solitons is obtained through large scale numerical calculations. Our study contributes to the current efforts in realizing topological excitations and squeezed light sources with solid-state devices.