Polarization Asymmetry In Waves Backscattering From Highly Absorbant Random Media

    Authors

    A. Dogariu; M. Dogariu; K. Richardson; S. D. Jacobs;G. D. Boreman

    Comments

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    Abbreviated Journal Title

    Appl. Optics

    Keywords

    LIGHT-SCATTERING; Optics

    Abstract

    Within the range in which light penetration depth is approximately the same as or less than the diameter of the particles in the medium, particulate media with considerable absorption behave as two-dimensional, rough-surface structures. As penetration depth increases, a complicated transition between volume and surface effects is seen. For these media, low-order scattering sequences have small spatial extent, making observation of polarization characteristics difficult. We present an experimental technique to access the low-order scattered photons by artificially reinjecting them through total internal reflections. Using a dielectric layer in contact with the high-absorption medium, we are able to observe fourfold polarization asymmetry in backscattering from highly absorbant media. We discuss the origin of the polarization patterns in a ray-optics approximation and suggest possibilities for solving practical problems encountered in characterizing composites with appreciable absorption. (C) 1997 Optical Society of America.

    Journal Title

    Applied Optics

    Volume

    36

    Issue/Number

    31

    Publication Date

    1-1-1997

    Document Type

    Article

    Language

    English

    First Page

    8159

    Last Page

    8164

    WOS Identifier

    WOS:A1997YD65900012

    ISSN

    0003-6935

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