Experimental determination of effective light transport properties in fully anisotropic media

Abstract

Structurally anisotropic materials are ubiquitous in several application fields, yet their accurate optical characterization remains challenging due to the lack of general models linking their scattering coefficients to the macroscopic transport observables, and the need to combine multiple measurements to retrieve their direction-dependent values. Here, we present an improved method for the experimental determination of light transport tensor coefficients from the diffusive rates measured along all three directions, based on transient transmittance measurements and a generalized Monte Carlo model. We apply our method to the characterization of light transport properties in two common anisotropic materials - polytetrafluoroethylene (PTFE) tape and paper - highlighting the magnitude of systematic deviations that are typically incurred when neglecting anisotropy.

References in corpus (10)

• Translation correlations in anisotropically scattering media
• Biomimetic Polymer Film with Brilliant Brightness Using a One-Step Water Vapor-Induced Phase Separation Method
• Non-classical transport with angular-dependent path-length distributions. 2: Application to pebble bed reactor cores
• Spatio-temporal visualization of light transport in complex photonic structures
• Anisotropic diffusive transport: connecting microscopic scattering and macroscopic transport properties
• Spatio-Temporal Imaging of Light Transport in Highly Scattering Media under White Light Illumination
• Exploiting breakdown of the similarity relation for diffuse light transport: simultaneous retrieval of scattering anisotropy and diffusion constant
• Deducing effective light transport parameters in optically thin systems
• Diffusion of light in structurally anisotropic media with uniaxial symmetry
• Biomineral Amorphous Lasers through Light-Scattering Surfaces Assembled by Electrospun Fiber Templates