Resonance effects in multiple scattering and absorption of laser light in granular random media: partial bleaching and expressed speckle formation

E. A. Isaeva; D. A. Zimnyakov

doi:10.1117/12.919154

22 November 2011 Resonance effects in multiple scattering and absorption of laser light in granular random media: partial bleaching and expressed speckle formation

E. A. Isaeva, D. A. Zimnyakov

Author Affiliations +

Proceedings Volume 8338, Tenth International Conference on Correlation Optics; 83380X (2011) https://doi.org/10.1117/12.919154
Event: Correlation Optics 2011, 2011, Chernivsti, Ukraine

Abstract

In this paper we present the results of examination of laser light scattering by suspensions of dielectric microspheres in host media with near-resonant absorption. It was found that when the mean transport free path of probing light in the suspensions becomes comparable with their geometrical thickness, the increase in resonance absorption of the host medium causes the expressed speckle modulation of transmitted light and the decrease in the extinction coefficient of the probed substances. These effects can be explained in terms of reduction of the scattering efficiency and increase of the scattering anisotropy parameter of scattering centers (dielectric microspheres) due to partial matching of the real parts of the refractive indices of the centers and the host medium. The statistical modeling of light transport through the examined dispersive systems was applied for analysis of this effect.

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E. A. Isaeva and D. A. Zimnyakov "Resonance effects in multiple scattering and absorption of laser light in granular random media: partial bleaching and expressed speckle formation", Proc. SPIE 8338, Tenth International Conference on Correlation Optics, 83380X (22 November 2011); https://doi.org/10.1117/12.919154

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