EIT-like phenomenon with two atomic ensembles in a cavity

TL;DR

This paper investigates EIT-like phenomena in two atomic ensembles coupled via a cavity, revealing how their spectral responses depend on their spatial arrangement and showing potential for controlling light-matter interactions.

Contribution

It demonstrates the emergence of EIT-like effects in coupled atomic ensembles with different spatial configurations within a cavity.

Findings

EIT-like transparency occurs in node-antinode arrangements.

Two transparent windows appear in antinode-antinode configurations.

Fluctuation spectra also exhibit EIT-like features.

Abstract

We study the spectra of collective low excitations of two atomic ensembles coupled indirectly through a single-mode cavity field. When the left ensemble is driven with an external optical field, its corresponding response spectrum to the incident optical light shows an electromagnetically induced transparency- (EIT-) like phenomenon when the layers are arranged in the sequence of node-antinode but not in the sequence of antinode-node. In the case of antinode-antinode sequence, the response spectrum shows an EIT-like phenomenon with two transparent windows. We also investigate the fluctuation spectra of the atomic collective excitation modes, which show similar EIT-like phenomena.