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Proceedings Paper

Diffusing wave spectroscopy in dynamically heterogeneous random media
Author(s): Serguei E. Skipetrov; Roger Maynard
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Paper Abstract

We present a theoretical analysis of temporal autocorrelation functions of multiply scattered light in turbid dynamically heterogenous random media. Particular geometries of planar slab and cylindrical capillary inserted in an otherwise macroscopically homogeneous medium are considered. Analytical expressions for time autocorrelation functions of depolarized scattered electric field measured at the sample surface are derived assuming that scatterers dynamics inside dynamically heterogeneous region differs from that in surrounding medium. We show that space resolved measurements of the temporal autocorrelation function of multiply scattered light at the sample surface provide information on spatially heterogeneous particle dynamics inside the sample and allows one to image hidden dynamic inclusion under conditions of no static scattering contrast. Spatial contrast in this case is purely dynamic and can be provided by different particle sizes as well as by different types of particle dynamics inside the inclusion and in background medium. The limitations of presented theoretical approach are outlined. Finally, we estimate the performance of the imaging technique based on the considered theory.

Paper Details

Date Published: 14 July 1998
PDF: 5 pages
Proc. SPIE 3423, Second GR-I International Conference on New Laser Technologies and Applications, (14 July 1998); doi: 10.1117/12.316593
Show Author Affiliations
Serguei E. Skipetrov, Moscow State Univ. (Russia)
Roger Maynard, Univ. Joseph Fourier (France)

Published in SPIE Proceedings Vol. 3423:
Second GR-I International Conference on New Laser Technologies and Applications
Alexis Carabelas; Paolo Di Lazzaro; Amalia Torre; Giuseppe Baldacchini, Editor(s)

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