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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Vol. 11, Iss. 4 — Apr. 1, 1994
  • pp: 1491–1499

Discrete-Dipole Approximation For Scattering Calculations

Bruce T. Draine and Piotr J. Flatau  »View Author Affiliations

JOSA A, Vol. 11, Issue 4, pp. 1491-1499 (1994)

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The discrete-dipole approximation (DDA) for scattering calculations, including the relationship between the DDA and other methods, is reviewed. Computational considerations, i.e., the use of complex-conjugate gradient algorithms and fast-Fourier-transform methods, are discussed. We test the accuracy of the DDA by using the DDA to compute scattering and absorption by isolated, homogeneous spheres as well as by targets consisting of two contiguous spheres. It is shown that, for dielectric materials (|m| ≲ 2), the DDA permits calculations of scattering and absorption that are accurate to within a few percent.

© 1994 Optical Society of America

Bruce T. Draine and Piotr J. Flatau, "Discrete-dipole approximation for scattering calculations," J. Opt. Soc. Am. A 11, 1491-1499 (1994)

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