title: Path-length-resolved dynamic light scattering: modeling the transition from single to diffusive scattering.
abstract: Dynamic light-scattering spectroscopy is used to study Brownian motion within highly scattering samples. The fluctuations of the light field that is backscattered by a suspension of polystyrene microspheres are measured as power spectra by use of low-coherence interferometry to obtain path-length resolution. The data are modeled as the sum of contributions to the detected light weighted by a Poisson probability for the number of events that each component has experienced. By analyzing the broadening of the power spectra as a function of the path length for various sizes of particles, we determine the contribution of multiple scattering to the detected signal as a function of scattering anisotropy.
authors: A
authors: A
authors: Wax
authors: C
authors: C
authors: Yang
authors: R R
authors: RR
authors: Dasari
authors: M S
authors: MS
authors: Feld