Time-resolved pulse propagation in a strongly scattering material

Patrick M. Johnson, Arnout Imhof, Boris P.J. Bret, Jaime Gómez Rivas, Ad Lagendijk

Research output: Contribution to journalArticleAcademicpeer-review

66 Citations (Scopus)
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Abstract

Light transport in macroporous gallium phosphide, perhaps the strongest nonabsorbing scatterer of visible light, is studied using phase-sensitive femtosecond pulse interferometry. Phase statistics are measured at optical wavelengths in both reflection and transmission and compared with theory. The diffusion constant of light is measured in both reflection and transmission as a function of thickness and compared with theories for diffusive transport and localization. An unusually high energy velocity due to the bicontinuous structure of the porous network is reported. For such strongly scattering samples, we show that surface properties and the effective index of refraction need to be treated carefully.
Original languageEnglish
Article number016604
Number of pages9
JournalPhysical review E: Statistical physics, plasmas, fluids, and related interdisciplinary topics
Volume68
Issue number1
DOIs
Publication statusPublished - 2003

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