# Enhancing Photon Correlations through Plasmonic Strong Coupling

## TL;DR

This paper explores how plasmonic nanocavities coupled with multiple emitters can generate nonclassical light, revealing enhanced excitonic nonlinearities and the role of plasmon-exciton-polaritons in quantum light sources.

## Contribution

It provides an analytical framework for intensity correlations in plasmonic systems and demonstrates the potential for nonclassical light generation beyond single emitters.

## Key findings

- Plasmonic cavities enhance excitonic nonlinearities with many emitters.
- Fingerprint of plasmon-exciton-polaritons in quantum statistics.
- Potential for scalable nonclassical light sources.

## Abstract

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.