There is an increasing scientific and technological interest on the design and implementation of nanoscale sources of quantum light. Here, we investigate the quantum statistics of the light scattered from a plasmonic nanocavity coupled to a mesoscopic ensemble of emitters under low coherent pumping. We present an analytical description of the intensity correlations taking place in these systems, and unveil the fingerprint of plasmon-exciton-polaritons in them. Our findings reveal that plasmonic cavities are able to retain and enhance excitonic nonlinearities even when the number of emitters is large. This makes plasmonic strong coupling a promising route for generating nonclassical light beyond the single emitter level.
@article{arxiv.1701.08964,
title = {Enhancing Photon Correlations through Plasmonic Strong Coupling},
author = {R. Sáez-Blázquez and J. Feist and A. I. Fernández-Domínguez and F. J. García-Vidal},
journal= {arXiv preprint arXiv:1701.08964},
year = {2019}
}