Polariton Squeezing in Semiconductor Microcavities

TL;DR

This paper demonstrates the generation of squeezed polaritons in semiconductor microcavities through four-wave mixing, achieving 9% squeezing near the bistability threshold, highlighting nonlinear and spatial effects.

Contribution

It reports the first observation of polariton squeezing in semiconductor microcavities using parametric four-wave mixing in the strong coupling regime.

Findings

Achieved 9% squeezing of polariton field.

Identified the role of spatial effects and filtering in optimizing squeezing.

Demonstrated bistability threshold effects in the nonlinear regime.

Abstract

We report squeezed polariton generation using parametric polariton four-wave mixing in semiconductor microcavities in the strong coupling regime. The geometry of the experiment corresponds to degenerate four-wave mixing, which gives rise to a bistability threshold. Spatial effects in the nonlinear regime are evidenced, and spatial filtering is required in order to optimize the measured squeezing. By measuring the noise of the outgoing light, we infer a 9 percent squeezing on the polariton field close to the bistability turning point.