Title

Dynamic light scattering in subdiffusive regimes

Authors

Authors

G. Popescu;A. Dogariu

Abbreviated Journal Title

Appl. Optics

Keywords

DIFFUSING-WAVE-SPECTROSCOPY; RANDOM-MEDIA; PHOTON TRANSPORT; REFLECTION; LIMIT; Optics

Abstract

For describing the fluctuating signal scattered from a multiple-scattering system, diffusive-wave spectroscopy makes use of a diffusion model that provides the path-length distribution of scattered waves for a specific geometry. Using the recently introduced optical path-length spectroscopy, we show that the diffusion model fails to describe wave propagation in the low-order multiple-scattering regime. We propose a new methodology with which to obtain information about the dynamic properties of nondiffusive scattering systems. We use optical path-length spectroscopy to obtain experimentally the pathlength distribution of optical waves scattered from dynamic colloids, which are multiply scattering but not in the diffusion limit. The experimental results show that, with this new technique, the accuracy of dynamic measurements is significantly improved in subdiffusive scattering regimes. (C) 2001 Optical Society of America.

Journal Title

Applied Optics

Volume

40

Issue/Number

24

Publication Date

1-1-2001

Document Type

Article

Language

English

First Page

4215

Last Page

4221

WOS Identifier

WOS:000170543300029

ISSN

1559-128X

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