Light localization signatures in backscattering from periodic disordered media

TL;DR

This paper analytically predicts the backscattering line shape in thick, periodically disordered media, revealing a distinctive triangular peak caused by the coexistence of localization and extended states.

Contribution

It introduces an analytical model for backscattering in periodic disordered media, highlighting the emergence of a triangular peak due to unique localization phenomena.

Findings

Triangular peak appears in backscattering line shape.

Coexistence of quasi-1D localization and 2D extended states.

Analytical prediction of backscattering signatures.

Abstract

The backscattering line shape is analytically predicted for thick disordered medium films where, remarkably, the medium configuration is periodic along the direction perpendicular to the incident light. A blunt triangular peak is found to emerge on the sharp top. The phenomenon roots in the coexistence of quasi-1D localization and 2D extended states.