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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 41, Iss. 27 — Sep. 20, 2002
  • pp: 5728–5743

Finite-Difference Time-Domain Solution of Light Scattering and Absorption by Particles in an Absorbing Medium

Wenbo Sun, Norman G. Loeb, and Qiang Fu  »View Author Affiliations


Applied Optics, Vol. 41, Issue 27, pp. 5728-5743 (2002)
http://dx.doi.org/10.1364/AO.41.005728


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Abstract

The three-dimensional (3-D) finite-difference time-domain (FDTD) technique has been extended to simulate light scattering and absorption by nonspherical particles embedded in an absorbing dielectric medium. A uniaxial perfectly matched layer (UPML) absorbing boundary condition is used to truncate the computational domain. When computing the single-scattering properties of a particle in an absorbing dielectric medium, we derive the single-scattering properties including scattering phase functions, extinction, and absorption efficiencies using a volume integration of the internal field. A Mie solution for light scattering and absorption by spherical particles in an absorbing medium is used to examine the accuracy of the 3-D UPML FDTD code. It is found that the errors in the extinction and absorption efficiencies from the 3-D UPML FDTD are less than ~2%. The errors in the scattering phase functions are typically less than ~5%. The errors in the asymmetry factors are less than ~0.1%. For light scattering by particles in free space, the accuracy of the 3-D UPML FDTD scheme is similar to a previous model [Appl. Opt. 38, 3141 (1999)].

© 2002 Optical Society of America

OCIS Codes
(000.4430) General : Numerical approximation and analysis
(010.4450) Atmospheric and oceanic optics : Oceanic optics
(010.7340) Atmospheric and oceanic optics : Water
(280.1310) Remote sensing and sensors : Atmospheric scattering
(290.5850) Scattering : Scattering, particles
(350.4990) Other areas of optics : Particles

Citation
Wenbo Sun, Norman G. Loeb, and Qiang Fu, "Finite-Difference Time-Domain Solution of Light Scattering and Absorption by Particles in an Absorbing Medium," Appl. Opt. 41, 5728-5743 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-27-5728

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