Enhancement of coherent light amplification using Anderson localization

TL;DR

This paper investigates how Anderson localization affects coherent light amplification in disordered media, analyzing reflection statistics and proposing alternative models for amplification and absorption effects.

Contribution

It provides new insights into modeling coherent amplification in disordered media and explores the interplay between Anderson localization and laser-like behavior without mirrors.

Findings

Reflection coefficient statistics depend on disorder and amplification parameters

Alternative modeling approaches for coherent absorption are proposed

Physical aspects of amplifying/absorbing disordered media are discussed

Abstract

Several aspects of interplay between Anderson localization and coherent amplification/absorption, and aspect of mirrorless laser for a laser-active (amplifying) disordered dielectric medium have been addressed. We have calculated the statistics of the reflection coefficient and the associated phase for a light wave reflected from a coherently amplifying/absorbing one-dimensional disordered dielectric medium for different lengths, different disorder strengths and different "amplification"/"absorption" parameters of the disordered sample. Problems with modeling coherent amplification/absorption by complex potential have been discussed. We have shown an alternative way to model the coherent absorption. Several conceptual and physical aspect for coherently amplifying/absorbing media with disorder also have been discussed.