Bichromatic four-wave mixing and quadrature-squeezing from biexcitons in atomically thin semiconductor microcavities

TL;DR

This paper theoretically investigates how bichromatic pumping in atomically thin semiconductor microcavities can generate quadrature-squeezed light through four-wave mixing involving biexcitons, offering potential for low-power nonlinear optical devices.

Contribution

It introduces a theoretical analysis of bichromatic-pump configurations for four-wave mixing and quadrature-squeezing in atomically thin semiconductor microcavities, highlighting new mechanisms for generating squeezed light.

Findings

Configurations support degenerate and non-degenerate scattering.

Generation of strongly single- and two-mode quadrature-squeezed light.

Potential for low-power nonlinear optical applications.

Abstract

Nonlinear optical effects such as four-wave mixing and generation of squeezed light are ubiquitous in optical devices and light sources. For new devices operating at low optical power, the resonant nonlinearity arising from the two-photon sensitive bound biexciton in a semiconductor microcavity is an interesting prospective platform. Due to the particularly strong Coulomb interaction in atomically thin semiconductors, these materials have strongly bound biexcitons and operate in the visible frequency range of the electromagnetic spectrum. To remove the strong pump laser from the generated light in optical devices or to simultaneously excite non-degenerate polaritons, a bichromatic-pump configuration with two spectrally separated pump lasers is desirable. In this paper, we theoretically investigate spontanous four-wave mixing and quadrature-squeezing in a bichromatically pumped atomically thin semiconductor microcavity. We explore two different configurations that support degenerate and non-degenerate scattering from polaritons into bound biexcitons, respectively. We find that these configurations lead to the generation strongly single- and two-mode quadrature-squeezed light.