The influence of evanescent waves on the nature of optical cooperative effects in atomic ensembles in a waveguide

TL;DR

This paper investigates how evanescent electromagnetic modes affect collective atomic behaviors in waveguides, revealing their dominant role in modifying dipole interactions and spontaneous decay processes.

Contribution

It introduces a quantum microscopic model to analyze the impact of evanescent waves on cooperative effects in atomic ensembles within waveguides, highlighting their significant influence.

Findings

Evanescent modes can dominate over radiation modes in atomic interactions.

Evanescent waves modify dipole-dipole interactions in atomic ensembles.

The influence of evanescent modes affects spontaneous decay and radiation transfer.

Abstract

Based on a consistent quantum microscopic approach, we investigate the peculiarities of collective polyatomic effects in atomic ensembles placed in a waveguide, caused by the presence of evanescent modes of electromagnetic field. We analyze the influence of these modes on the process of cooperative spontaneous decay, as well as on the nature of radiation transfer in the ensembles under consideration. We show that under certain conditions, their influence can be dominant compared to the role of radiation modes, and the mechanism for this influence is the modification of dipole-dipole interatomic interaction.