Non-equilibrium states of a plasmonic Dicke model with coherent and dissipative surface plasmon-quantum emitter interactions

TL;DR

This paper investigates the complex non-equilibrium behaviors of a plasmonic Dicke model with both coherent and dissipative interactions, revealing new lasing phases and spectral signatures in hybrid nanostructures.

Contribution

It introduces a generalized plasmonic Dicke model to analyze the interplay of coherent and dissipative couplings, uncovering novel lasing phases and phase boundaries.

Findings

Extension of superradiant and lasing states into dissipative regimes

Discovery of a lasing phase without population inversion

Photon spectra exhibit distinct signatures of different phases

Abstract

Hybrid photonic-plasmonic nanostructures allow one to engineer coupling of quantum emitters and cavity modes accounting for the direct coherent and environment mediated dissipative pathways. Using generalized plasmonic Dicke model, we explore the non-equilibrium phase diagram with respect to these interactions. The analysis shows that their interplay results in the extension of the superradiant and regular lasing states to the dissipative coupling regime and an emergent lasing phase without population inversion having boundary with the superradiant and normal states. Calculated photon emission spectra are demonstrated to carry distinct signatures of these phases.