Numerical study of light correlations in a random medium close to Anderson localization threshold

TL;DR

This paper uses FDTD simulations to investigate how light correlations behave near the Anderson localization threshold in random media, revealing deviations from diffusion theory predictions.

Contribution

It provides the first detailed numerical analysis of field and intensity correlations near Anderson localization, highlighting deviations from existing diffusion models.

Findings

Correlations deviate from diffusion theory near localization threshold

Shape and magnitude of correlation functions change close to localization

Physical implications of deviations are discussed

Abstract

We applied finite difference time domain (FDTD) algorithm to the study of field and intensity correlations in random media. Close to the onset of Anderson localization, we observe deviations of the correlation functions, in both shape and magnitude, from those predicted by the diffusion theory. Physical implications of the observed phenomena are discussed.