Experimental determination of effective light transport properties in fully anisotropic media

Pini, Ernesto (author), Naglič, Peter (author), Bürmen, Miran (author), Gatto, Alexander (author), Schäferd, Henrik (author), Wiersma, Diederik S. (author), Pattelli, Lorenzo (author)

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 tape and paper—highlighting the magnitude of systematic deviations that are typically incurred when neglecting anisotropy.

• Language: English
• Keywords: scattering, anisotropy, material properties, simulations, light scattering, transmittance, diffusion, picosecond phenomena, signal intensity, refractive index
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FE - Faculty of Electrical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2024
• Number of pages: Str. 056017-1-056017-8
• Numbering: Vol. 4, no. 5, art. 056017
• PID: 20.500.12556/RUL-168024
• UDC: 535.36
• ISSN on article: 2791-1519
• DOI: 10.1117/1.APN.3.5.056017
• COBISS.SI-ID: 229763587
• Publication date in RUL: 25.03.2025

Record is a part of a journal

• Title: Advanced photonics nexus
• Shortened title: Adv. photonics nexus
• Publisher: SPIE, Chinese Laser Press
• ISSN: 2791-1519
• COBISS.SI-ID: 229760515

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: sipanje, anizotropija, lastnosti materialov, simulacije, sipanje svetlobe, transmitanca, difuzija, pikosekundni pojavi, lomni količnik