Coherent Polariton Radiation and Light Localization

TL;DR

This paper investigates how resonance atoms in a polariton medium can exhibit suppressed or enhanced light emission depending on their interactions, revealing conditions for coherent polariton radiation and light localization.

Contribution

It introduces the concept of coherent polariton radiation in media with a polariton gap and analyzes the conditions for light localization versus collective emission.

Findings

Atomic emission can be suppressed inside the polariton gap.

Strong coherent interactions enable ensemble radiation despite the gap.

Conditions for coherent polariton emission are identified.

Abstract

A system of resonance atoms is placed in a medium with developed polariton effect. In the spectrum of polariton states there can exist a band gap. If an atom with a resonance frequency inside the polariton gap is incorporated into the medium, the atomic spontaneous emission can be strongly suppressed. This is what is called the localization of light. Nevertheless, an ensemble of resonance atoms inside the polariton gap can radiate if their coherent interaction is sufficiently strong. Conditions when coherent polariton radiation can appear and the properties of this coherent polariton emission are studied.