Bi-functional nonlinearities in monodisperse ZnO nano-grains - Self-consistent transport and random lasing

TL;DR

This paper introduces a quantum field theoretical model for light transport and random lasing in disordered media, incorporating off-shell scattering and non-elastic effects, with results on mean free path and correlation length.

Contribution

It presents the first theoretical framework combining off-shell scattering and lasing in random media using a self-consistent quantum field approach.

Findings

Self-consistent scattering mean free path varies across the sample

Density-dependent correlation length analyzed in semiconductor Mie scatterers

First to include off-shell scattering in lasing theory

Abstract

We report a quantum field theoretical description of light transport and random lasing. The Bethe-Salpeter equation is solved including maximally crossed diagrams and non-elastic scattering. This is the first theoretical framework that combines so called off-shell scattering and lasing in random media. We present results for the self-consistent scattering mean free path that varies over the width of the sample. Further we discuss the density dependent correlation length of self-consistent transport in disordered media composed of semi-conductor Mie scatterers.