Determination of the diffusion constant using phase-sensitive measurements

TL;DR

This paper demonstrates a method using phase-sensitive measurements to accurately determine the diffusion constant of light in disordered materials, validating the diffusion model and phase statistics theory.

Contribution

It introduces a pulsed-light interferometer technique that simultaneously measures intensity and phase, providing a comprehensive approach to analyze light diffusion in scattering media.

Findings

Multiple measurement techniques yield consistent diffusion constants.

Experimental validation supports the diffusion model for light propagation.

Phase statistics theory is corroborated by the measurements.

Abstract

We apply a pulsed-light interferometer to measure both the intensity and the phase of light that is transmitted through a strongly scattering disordered material. From a single set of measurements we obtain the time-resolved intensity, frequency correlations and statistical phase information simultaneously. We compare several independent techniques of measuring the diffusion constant for diffuse propagation of light. By comparing these independent measurements, we obtain experimental proof of the consistency of the diffusion model and corroborate phase statistics theory.