Coherence loss in light backscattering by random media with nanoscale nonuniformities

An experimental technique for measuring time-resolved coherence loss and destruction of backscattered wave packets in random media is described. The results of such measurements, performed with a modified Michelson interferometer, contain rich information about the characteristics of media nonunifor...

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Bibliographic Details
Published in:	Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics Vol. 75; no. 4 Pt 2; p. 046605
Main Authors:	Brodsky, Anatol M, Mitchell, Gordon T, Ziegler, Summer L, Burgess, Lloyd W
Format:	Journal Article
Language:	English
Published:	United States 01-04-2007
Subjects:	BACKSCATTERING imaging and optical processing INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY MICHELSON INTERFEROMETER NANOSTRUCTURES spectroscopy SUSPENSIONS TIME RESOLUTION VISIBLE RADIATION wave optics
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Summary:	An experimental technique for measuring time-resolved coherence loss and destruction of backscattered wave packets in random media is described. The results of such measurements, performed with a modified Michelson interferometer, contain rich information about the characteristics of media nonuniformities. Experimental data for model nanosuspensions are compared with theoretical expressions developed in the paper which include the effects of Mie-type resonant scattering. We attribute one such observed effect to enhanced ineleastic optical transitions near the surface of nonmetallic nanoparticles. The inverse problem of characterization of multiscattering random media by backscattering is also considered.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 PNNL-SA-53294 USDOE AC05-76RL01830
ISSN:	1539-3755 1063-651X 1550-2376 1095-3787
DOI:	10.1103/PhysRevE.75.046605