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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 13 — May. 1, 2009
  • pp: 2421–2426

Electromagnetic scattering by densely packed particulate ice at radar wavelengths: exact theoretical results and remote-sensing implications

Michael I. Mishchenko and Li Liu  »View Author Affiliations


Applied Optics, Vol. 48, Issue 13, pp. 2421-2426 (2009)
http://dx.doi.org/10.1364/AO.48.002421


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Abstract

We use the numerically exact superposition T-matrix method to compute electromagnetic scattering characteristics of a macroscopic volume of a discrete random medium filled with wavelength-sized spherical particles with a refractive index typical of water ice at centimeter wavelengths. Our analysis demonstrates relative strengths of various optical observables in terms of their potential remote-sensing content. In particular, it illustrates the importance of accounting for the forward-scattering interference effect in the interpretation of occultation measurements of planetary rings. We show that among the most robust indicators of the amount of multiple scattering inside a particulate medium are the cross- polarized scattered intensity, the same-helicity scattered intensity, and the circular polarization ratio. We also demonstrate that many predictions of the low-packing-density theories of radiative transfer and coherent backscattering are applicable, both qualitatively and semi-quantitatively, to densely packed media.

OCIS Codes
(030.1670) Coherence and statistical optics : Coherent optical effects
(030.5620) Coherence and statistical optics : Radiative transfer
(290.4210) Scattering : Multiple scattering
(290.5850) Scattering : Scattering, particles

ToC Category:
Coherence and Statistical Optics

History
Original Manuscript: February 12, 2009
Manuscript Accepted: March 23, 2009
Published: April 22, 2009

Citation
Michael I. Mishchenko and Li Liu, "Electromagnetic scattering by densely packed particulate ice at radar wavelengths: exact theoretical results and remote-sensing implications," Appl. Opt. 48, 2421-2426 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-13-2421

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