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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 40, Iss. 9 — Mar. 20, 2001
  • pp: 1532–1547

Asymptotic solutions for optical properties of large particles with strong absorption

Ping Yang, Bo-Cai Gao, Bryan A. Baum, Yong X. Hu, Warren J. Wiscombe, Michael I. Mishchenko, Dave M. Winker, and Shaima L. Nasiri  »View Author Affiliations


Applied Optics, Vol. 40, Issue 9, pp. 1532-1547 (2001)
http://dx.doi.org/10.1364/AO.40.001532


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Abstract

The transverse wave condition is not applicable to the refracted electromagnetic wave within the context of geometrical optics when absorption is involved. Either the TM or the TE wave condition can be assumed for the wave to locally satisfy the electromagnetic boundary condition in a ray-tracing calculation. The assumed wave mode affects both the reflection and the refraction coefficients. As a result, nonunique solutions for these coefficients are inevitable. In this study the appropriate solutions for the Fresnel reflection–refraction coefficients are identified in light-scattering calculations based on the ray-tracing technique. In particular, a 3 × 2 refraction or transmission matrix is derived to account for the inhomogeneity of the refracted wave in an absorbing medium. An asymptotic solution that completely includes the effect of medium absorption on Fresnel coefficients is obtained for the scattering properties of a general polyhedral particle. Numerical results are presented for hexagonal plates and columns with both preferred and random orientations.

© 2001 Optical Society of America

OCIS Codes
(010.1290) Atmospheric and oceanic optics : Atmospheric optics
(010.1310) Atmospheric and oceanic optics : Atmospheric scattering
(010.3920) Atmospheric and oceanic optics : Meteorology
(280.1310) Remote sensing and sensors : Atmospheric scattering
(290.1090) Scattering : Aerosol and cloud effects
(290.5850) Scattering : Scattering, particles

History
Original Manuscript: July 11, 2000
Revised Manuscript: November 29, 2000
Published: March 20, 2001

Citation
Ping Yang, Bo-Cai Gao, Bryan A. Baum, Yong X. Hu, Warren J. Wiscombe, Michael I. Mishchenko, Dave M. Winker, and Shaima L. Nasiri, "Asymptotic solutions for optical properties of large particles with strong absorption," Appl. Opt. 40, 1532-1547 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-9-1532

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