The discrete dipole approximation for simulation of light scattering by particles much larger than the wavelength

By Maxim A. Yurkin, Valeri P. Maltsev, Alfons G. Hoekstra. 2007

202 citations recorded by the source corpus.

In this paper we investigate the capabilities of the discrete dipole approximation (DDA) to simulate scattering from particles that are much larger than the wavelength of the incident light, and describe an optimized publicly available DDA computer program that processes the large number of dipoles required for such simulations. Numerical simulations of light scattering by spheres with size parameters x up to 160 and 40 for refractive index m ¼ 1:05 and 2, respectively, are presented and compared with exact results of the Mie theory. Errors of both integral and angle-resolved scattering quantities generally increase with m and show no systematic dependence on x: Computational times increase steeply with both x and m, reaching values of more than 2 weeks on a cluster of 64 processors. The main distinctive feature of the computer program is the ability to parallelize a single DDA simulation over a cluster of computers, which allows it to simulate light scattering by very large particles, like the ones that are considered in this paper. Current limitations and possible ways for improvement are discussed. r 2007 Elsevier Ltd. All rights reserved.

Subfields: Atmospheric Science, Atomic and Molecular Physics, and Optics, Global and Planetary Change

View Paper: https://www.semanticscholar.org/paper/5c53556452698d0dad93f1b8e7d9e67782205a89

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Citations in the corpus

Spectrally Consistent Scattering, Absorption, and Polarization Properties of Atmospheric Ice Crystals at Wavelengths from 0.2 to 100 um (2013, methodology): “Calculations for other faceted habits are performed using the ADDA computational program (Yurkin et al. 2007b; http://code.google.com/ p/a-dda/downloads/list) for x # 20 and an improved and reﬁned version of the IGOM (Bi et al. 2009) for x .”
Impact of radiatively interactive dust aerosols in the NASA GEOS‐5 climate model: Sensitivity to dust particle shape and refractive index (2014, methodology): “…for randomly oriented triaxial ellipsoids based on a combination of the solutions derived from Mie theory, the T-Matrix method [Mishchenko and Travis, 1998], the discrete dipole approximation (DDA) technique [Yurkin et al., 2007], and an improved geometric optics method [Yang and Liou, 1996].”