Discrete-Dipole Approximation for Scattering Calculations

Citation:
Draine, BT, Flatau PJ.  1994.  Discrete-Dipole Approximation for Scattering Calculations. Journal of the Optical Society of America a-Optics Image Science and Vision. 11:1491-1499.

Date Published:

Apr

Keywords:

absorption, algorithm, arbitrary particle, electromagnetic scattering, interstellar grains, light-scattering, nonspherical particles, optical-properties, particles, porous grains, shaped

Abstract:

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 (Absolute value of m less than or similar to 2), the DDA permits calculations of scattering and absorption that are accurate to within a few percent.

Notes:

n/a

Website

DOI:

10.1364/josaa.11.001491