Optomechanical lasing and domain walls driven by exciton-phonon interactions

TL;DR

This paper theoretically investigates how exciton-phonon interactions in semiconductor nanostructures lead to optomechanical lasing with chaotic spectra and the formation of propagating domain walls, expanding understanding of nonlinear sound propagation.

Contribution

It introduces the concept of optomechanical domain walls driven by exciton-phonon interactions and analyzes their stability in semiconductor nanostructures.

Findings

Broadband chaotic-like lasing spectra in nonlinear regime

Prediction of propagating optomechanical domain walls

Analytical stability conditions confirmed by simulations

Abstract

We study theoretically interaction of optically-pumped excitons with acoustic waves in planar semiconductor nanostructures in the strongly nonlinear regime. We start with the multimode optomechanical lasing regime for optical pump frequency {above} the exciton resonance and demonstrate broadband chaotic-like lasing spectra. We also predict formation of propagating optomechanical domain walls driven by optomechanical nonlinearity for the optical pump {below} the exciton resonance. Stability conditions for the domain walls are examined analytically and are in agreement with direct numerical simulations. Our results apply to nonlinear sound propagation in the arrays of quantum wells or in the plane of Bragg semiconductor microcavities hosting excitonic polaritons.