title: Time-resolved pulse propagation in a strongly scattering material.
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.
authors.affiliation: Van der Waals-Zeeman Instituut, Universiteit van Amsterdam, 1018 XE Amsterdam, The Netherlands. P.M.Johnson@phys.uu.nl
authors.forename: Patrick M
authors.initials: PM
authors.lastname: Johnson
authors.forename: Arnout
authors.initials: A
authors.lastname: Imhof
authors.forename: Boris P J
authors.initials: BP
authors.lastname: Bret
authors.forename: Jaime Gómez
authors.initials: JG
authors.lastname: Rivas
authors.forename: Ad
authors.initials: A
authors.lastname: Lagendijk