Using a high-quality GaAs planar microcavity, we optically generate polariton pairs, and verify their correlations by means of time-resolved single-photon detection. We find that correlations between the different modes are consistently lower than identical mode correlations, which is attributed to the presence of uncorrelated background. We discuss a model to quantify the effects of such a background on the observed correlations. Using spectral and temporal filtering, the background can be suppressed and a change in photon statistics towards non-classical correlations is observed. These results improve our understanding of the statistics of polariton-polariton scattering and background mechanisms, and pave the way to the generation of entangled polariton pairs.
@article{arxiv.1808.01127,
title = {Quantum statistics of polariton parametric interactions},
author = {Mathias Sassermann and Zoltán Vörös and Mohsen Razavi and Wolfgang Langbein and Gregor Weihs},
journal= {arXiv preprint arXiv:1808.01127},
year = {2018}
}