Dipole-dipole shift of quantum emitters coupled to surface plasmons of a nano-wire

TL;DR

This paper develops a method to calculate dipole-dipole shifts of quantum emitters near nano-wires, revealing how surface plasmons influence emitter interactions and decay rates over large distances.

Contribution

The paper introduces a general calculation method for level shifts of emitters coupled to surface plasmons, applied specifically to atom pairs near nano-wires.

Findings

Surface plasmons modify collective decay rates.

Dipole-dipole shifts depend on emitter-wire distance.

Method enables analysis of emitter interactions via surface plasmons.

Abstract

Placing quantum emitters close to a metallic nano-wire, an effective interaction can be achieved over distances large compared to the resonance wavelength due to the strong coupling between emitters and the surface plasmon modes of the wire. This leads to modified collective decay rates, as well as to Lamb and dipole-dipole shifts. In this paper we present a general method for calculating these level shifts which we subsequently apply to the case of a pair of atoms coupled to the guided modes of a nano-wire.