Features of Diffusing Wave Spectroscopy

Abstract

Photon correlation spectroscopy is extended to strongly multiply scattering systems by assuming that the transport of light is diffusive. A simple model is developed which accounts for different sample geometries, scattering configurations, absorption, and sample polydispersity. Experimental data are found to be in excellent agreement with the predictions. The dependence on geometry provides an important experimental control over the length and time scales probed.