Influence of exciton-exciton correlations on the polarization characteristics of the polariton amplification in semiconductor microcavities

TL;DR

This paper uses a microscopic many-particle theory to analyze how excitonic correlations affect the polarization and amplification of polaritons in semiconductor microcavities, revealing polarization rotation effects.

Contribution

It provides a quantitative, parameter-free analysis of how excitonic correlations influence polariton amplification and polarization states in microcavities.

Findings

Excitonic correlations reduce parametric scattering in co-linear configurations.

Excitonic correlations enhance scattering in cross-linear configurations.

The theory predicts polarization rotation of the amplified probe signal.

Abstract

Based on a microscopic many-particle theory we investigate the influence of excitonic correlations on the vectorial polarization state characteristics of the parametric amplification of polaritons in semiconductor microcavities. We study a microcavity with perfect in-plane isotropy. A linear stability analysis of the cavity polariton dynamics shows that in the co-linear (TE-TE or TM-TM) pump-probe polarization state configuration, excitonic correlations diminish the parametric scattering process whereas it is enhanced by excitonic correlations in the cross-linear (TE-TM or TM-TE) configuration. Without any free parameters, our microscopic theory gives a quantitative understanding how many-particle effects can lead to a rotation or change of the outgoing (amplified) probe signal's vectorial polarization state relative to the incoming one's.