Frenkel-like plasmonic excitons in plasmonic lattices: Energy spectrum, radiative relaxation, and Bose-Einstein condensation

TL;DR

This paper introduces a quantum theory for Frenkel-like plasmonic excitons in lattices, exploring their energy spectrum, radiative relaxation, and potential for room-temperature Bose-Einstein condensation.

Contribution

It develops a consistent quantum model for plasmonic excitons in 1D and 2D lattices, including radiative relaxation effects, and discusses the possibility of room-temperature Bose-Einstein condensation.

Findings

Quantum theory of plasmonic excitons is established.

Radiative relaxation effects are incorporated into the model.

Room-temperature Bose-Einstein condensation is theoretically possible.

Abstract

The concept of quantum plasmonic excitations in plasmonic lattices, which similarly to Frenkel excitons in molecular crystals propagate by hopping from one nanoparticle to another, is introduced. A consistent quantum theory of such plasmonic excitons, beginning with the quantization of localized surface plasmons in a metal nanoparticle and including the radiative relaxation in both 1D and 2D lattices near a reflective substrate surface, is developed. A possible room-temperature Bose-Einstein condensation in the quantum gas of plasmonic excitons is also discussed.