Collective effects in emission of quantum dots strongly coupled to a microcavity photon

TL;DR

This paper develops a theoretical model for the nonlinear emission behavior of quantum dot ensembles in microcavities, highlighting the impact of exciton interactions and collective superradiance on emission spectra.

Contribution

It introduces a combined numerical and analytical framework to analyze nonlinear emission in quantum dot-microcavity systems, emphasizing the stability of superradiant modes.

Findings

Nonlinear interactions significantly alter emission spectra.

Superradiant exciton modes remain stable under nonlinear effects.

Analytical and numerical results show good agreement.

Abstract

A theory of non-linear emission of quantum dot ensembles coupled to the optical mode of the microcavity is presented. Numerical results are compared with analytical approaches. The effects of exciton-exciton interaction within the quantum dots and with the reservoir formed by nonresonant pumping are considered. It is demonstrated, that the nonlinearity due to the interaction strongly affects the shape of the emission spectra. The collective superradiant mode of the excitons is shown to be stable against the non-linear effects.