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Anisotropic enhanced backscattering induced by anisotropic diffusion.

B P J Bret1, A Lagendijk

  • 1Universiteit Twente, Postbus 217, 7500AE Enschede, The Netherlands. b.p.j.bret@utwente.nl

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|November 5, 2004
PubMed
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This study reports enhanced backscattering from anisotropic diffusion in gallium phosphide. Wave interference is preserved in helicity-preserving channels, with interface reflectivity influencing the backscatter cone width.

Area of Science:

  • Condensed matter physics
  • Wave phenomena in disordered media

Background:

  • Anisotropic diffusion in materials leads to complex wave scattering phenomena.
  • Understanding light propagation in disordered semiconductors is crucial for optical applications.

Purpose of the Study:

  • To investigate enhanced backscattering from a semiconductor with anisotropic diffusion.
  • To analyze the role of polarization and interface reflectivity on the backscatter cone.

Main Methods:

  • Experimental measurement of enhanced backscattering cone.
  • Characterization of polarization-dependent wave interference.
  • Angular-resolved transmission measurements to determine interface reflectivity.

Main Results:

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  • Observed strong anisotropy in the enhanced backscattering cone.
  • Demonstrated preservation of constructive interference in helicity-preserving polarization channels.
  • Quantified the isotropic influence of interface reflectivity on the backscatter cone width.

    • Conclusions:

    • The anisotropic diffusion in gallium phosphide significantly affects the backscattering pattern.
    • Interface reflectivity, though isotropic, plays a key role in shaping the backscatter cone.
    • The findings simplify the analysis of wave transport in anisotropic disordered media.