Abstract

New phenomena are reviewed on the multiple scattering of laser light waves propagating through random media. Coherent wave interference occurring inside or outside the scattering media leads to weak localization of photons and the enhancement of scattered intensity in the backward direction. When the strength of scattering increases, photon trajectories in a medium tend to be correlated with each other. This effect results in long-range intensity correlations in near and far field speckle patterns and non-Rayleigh statistics of the intensity distributions. Diffusing-wave spectroscopy and some possible applications of the multiple scattering phenomena are also discussed.

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