Dressed states of a quantum emitter strongly coupled to a metal nanoparticle

TL;DR

This paper explores the strong coupling between a quantum emitter and a metal nanoparticle, providing a detailed theoretical framework that parallels cavity QED, and discusses implications for nanoscale optical sources.

Contribution

It introduces a clear theoretical description of hybridization in quantum emitter-metal nanoparticle systems, enhancing understanding of energy exchange and optical properties.

Findings

Hybridization described in analogy with cavity QED

Analysis of near and far field emission properties

Insights into energy exchange mechanisms in plasmonic systems

Abstract

Hybrid molecular-plasmonic nanostructures have demonstrated their potential for surface enhanced spectroscopies, sensing or quantum control at the nanoscale. In this work, we investigate the strong coupling regime and explicitly describe the hybridization between the localized plasmons of a metal nanoparticle and the excited state of a quantum emitter, offering a simple and precise understanding of the energy exchange in full analogy with cavity quantum electrodynamics treatment and dressed atom picture. Both near field emission and far field radiation are discussed, revealing the richness of such optical nanosources.