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Applied Optics

Applied Optics


  • Vol. 40, Iss. 24 — Aug. 20, 2001
  • pp: 4215–4221

Dynamic light scattering in subdiffusive regimes

Gabriel Popescu and Aristide Dogariu  »View Author Affiliations

Applied Optics, Vol. 40, Issue 24, pp. 4215-4221 (2001)

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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 path-length 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.

© 2001 Optical Society of America

OCIS Codes
(030.1640) Coherence and statistical optics : Coherence
(030.6600) Coherence and statistical optics : Statistical optics
(290.1350) Scattering : Backscattering
(290.4210) Scattering : Multiple scattering

Original Manuscript: November 20, 2000
Revised Manuscript: April 17, 2001
Published: August 20, 2001

Gabriel Popescu and Aristide Dogariu, "Dynamic light scattering in subdiffusive regimes," Appl. Opt. 40, 4215-4221 (2001)

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