Second-order correlations in an exciton-polariton Rabi oscillator

TL;DR

This paper develops a theoretical framework to analyze second-order correlations in exciton-polariton systems, proposing experiments to explore exciton-light interactions and predicting unique correlation behaviors due to decoherence effects.

Contribution

The paper introduces a new formalism for calculating second-order correlations in dissipative exciton-polariton systems and suggests experimental methods to observe these phenomena.

Findings

Correlator between upper and lower polaritons decreases below 1 due to decoherence.

Individual polariton branches show non-monotonous bunching in coherence.

Proposes intensity-intensity correlation experiments to study exciton-light coupling.

Abstract

We develop the theoretical formalism to calculate second-order correlations in dissipative exciton-polariton system and we propose intensity-intensity correlation experiments to reveal the physics of exciton-light coupling in semiconductor microcavities in the Rabi oscillation regime. We predict a counter intuitive behaviour of the correlator between upper and lower polariton branches: due to the decoherence caused by stochastic exciton-photon conversions this correlator is expected to decrease below 1, while the individual second-order coherence of upper and lower polaritons exhibits non-monotonous bunching.