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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 40, Iss. 24 — Aug. 20, 2001
  • pp: 4222–4227

Path-length-resolved dynamic light scattering: modeling the transition from single to diffusive scattering

Adam Wax, Changhuei Yang, Ramachandra R. Dasari, and Michael S. Feld  »View Author Affiliations


Applied Optics, Vol. 40, Issue 24, pp. 4222-4227 (2001)
http://dx.doi.org/10.1364/AO.40.004222


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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.

© 2001 Optical Society of America

OCIS Codes
(030.5290) Coherence and statistical optics : Photon statistics
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(290.4210) Scattering : Multiple scattering
(290.7050) Scattering : Turbid media

History
Original Manuscript: August 29, 2000
Revised Manuscript: March 19, 2001
Published: August 20, 2001

Citation
Adam Wax, Changhuei Yang, Ramachandra R. Dasari, and Michael S. Feld, "Path-length-resolved dynamic light scattering: modeling the transition from single to diffusive scattering," Appl. Opt. 40, 4222-4227 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-24-4222

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