Collective strong coupling in a plasmonic nanocavity

Quantum plasmonics extends cavity quantum electrodynamics (cQED) concepts to the nanoscale, benefiting from the strongly subwavelength confinement of the plasmon modes supported by metal nanostructures. In this work, we describe in detail collective strong coupling to a plasmonic nanocavity. Similarities and differences to cQED are emphasized. We notably observe that the Rabi splitting can strongly deviate from the standard NeDelta Omega 1 law, where N-e is the number of emitters and Delta Omega (1) is the Rabi splitting for a single emitter. In addition, we discuss the collective Lamb shift and the role of quantum corrections to the emission spectra.

Automated summary

Quantum plasmonics extends the concepts of cavity quantum electrodynamics (cQED) to the nanoscale, benefiting from the strong subwavelength confinement of plasmon modes supported by metal nanostructures. This work describes in detail the collective strong coupling to a plasmonic nanocavity, emphasizing both similarities and differences with cQED, and discusses deviations in Rabi splitting and the influence of quantum corrections on emission spectra.