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Correlations among angular wave component amplitudes in elastic multiple-scattering random media.

Brian G Hoover1, Louis Deslauriers, Shawn M Grannell

  • 1University of Michigan, Department of Electrical Engineering and Computer Science, Ann Arbor, Michigan 48109-2122, USA. Hoover@engin.umich.edu

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|February 28, 2002
PubMed
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Coherent wave transmission occurs in random media via a mechanism like coherent backscattering. This phenomenon offers corrections to radiative-transfer theory, especially at larger scattering angles.

Area of Science:

  • Physics
  • Optics
  • Wave Propagation

Background:

  • Understanding wave propagation through random media is crucial for various applications.
  • Multiple elastic scattering complicates wave behavior, often analyzed using radiative-transfer theory.
  • Coherent phenomena, like backscattering, can emerge even in disordered systems.

Purpose of the Study:

  • To derive an expression for the angular correlation of scattered wave amplitudes.
  • To investigate coherent wave transmission in random media with multiple scattering.
  • To compare theoretical predictions with experimental data from laser light scattering.

Main Methods:

  • Derivation of an expression for angular correlation of scattered wave amplitudes.
  • Analysis of coherent wave transmission mechanisms.

Related Experiment Videos

  • Fitting theoretical angular correlation curves to experimental data using probability densities of material parameters.

    • Main Results:

    • A mechanism for coherent wave transmission, analogous to coherent backscattering, was identified.
    • The study found consistency with radiative-transfer theory at small angles.
    • Coherent transmission provided corrections to radiative-transfer theory at larger angles.

    Conclusions:

    • Coherent wave transmission is a significant factor in wave propagation through random media.
    • The derived theoretical framework accurately models experimental observations of laser light scattering.
    • This work refines existing theories by incorporating coherent effects in multiple scattering scenarios.