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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 40, Iss. 18 — Jun. 20, 2001
  • pp: 3110–3123

Application of the Extended Boundary Condition Method to Homogeneous Particles with Point-Group Symmetries

F. Michael Kahnert, Jakob J. Stamnes, and Knut Stamnes  »View Author Affiliations


Applied Optics, Vol. 40, Issue 18, pp. 3110-3123 (2001)
http://dx.doi.org/10.1364/AO.40.003110


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Abstract

The numerical evaluation of surface integrals is the most time-consuming part of the extended boundary condition method (EBCM) for calculating the T matrix. An efficient implementation of the method is presented for homogeneous particles with discrete geometric symmetries and is applied to regular polyhedral prisms of finite length. For such prisms, an efficient quadrature scheme for computing the surface integrals is developed. Exploitation of these symmetries in conjunction with the new quadrature scheme leads to a reduction in CPU time by 3 orders of magnitude from that of a general EBCM implementation with no geometry-specific adaptations. The improved quadrature scheme and the exploitation of symmetries account for, respectively, 1 and 2 orders of magnitude in the total reduction of the CPU time. Test results for scattering by rectangular parallelepipeds and hexagonal plates are shown to agree well with corresponding results obtained by use of the discrete-dipole approximation. A model application for various polyhedral prisms is presented.

© 2001 Optical Society of America

OCIS Codes
(260.2110) Physical optics : Electromagnetic optics
(290.5850) Scattering : Scattering, particles

Citation
F. Michael Kahnert, Jakob J. Stamnes, and Knut Stamnes, "Application of the Extended Boundary Condition Method to Homogeneous Particles with Point-Group Symmetries," Appl. Opt. 40, 3110-3123 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-18-3110


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