Intensity and field correlations in multiple scattered light

Abstract

We discuss the influence of interference in multiple scattering of light in strongly scattering media on field (amplitude) and intensity correlations. Results of experimental measurements on the dependence of the recently found long-range intensity fluctuations on the spatial profile of the incoming beam are presented. Our results are consistent with the recently introduced concept of an energy velocity, which is substantially lower than the phase velocity. We demonstrate that an important relation exists between the redshifts introduced by Wolf and weak localization of light. © 1991.