Abstract

The transport properties of dense random media such as rutile powder layers and polyball suspensions are analyzed in visible and near infrared on the basis of experimental data on coherent backscattering, diffuse transmittance, and low-coherence interferometry. The developed technique of retrieval of the transport parameters of examined scattering media allows the evaluation of the transport mean free path l* and the effective refractive index nef of the medium without a priori knowledge of the optical properties of the scattering particles. It is found that with decreasing wavelength λ0 the value of localization parameter 2πnefl*λ0 of the studied rutile samples abruptly drops and approaches 2.6 at 473nm. This peculiarity is caused by the very large scattering efficiency of scatterers in the vicinity of the first Mie resonance.

© 2007 Optical Society of America

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