Phys.org September 17, 2024
Although structurally anisotropic materials are ubiquitous in several application fields, 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. An international team of researchers (Italy, Slovenia, Germany) developed 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. They applied their method to the characterization of light-transport properties in two common anisotropic materials—polytetrafluoroethylene tape and paper—highlighting the magnitude of systematic deviations that are typically incurred when neglecting anisotropy… read more. Open Access TECHNICAL ARTICLE
Sketch of the experimental setup… Credit: Advanced Photonics Nexus, Vol. 3, Issue 5, 056017 (September 2024).