Dipolar unit size in coupled-dipole calculations of the scattering matrix elements
Hoekstra, Alfons G.
Sloot, Peter M. A.
Date of Issue1993
School of Computer Engineering
The coupled-dipole method is widely used to calculate the light-scattering matrix S from arbitrary particles. An important parameter in the model is the size of the dipolar subunits. Usually a size of ~1/10 to ~1/20 of the wavelength of the incident light is sufficient for accurate calculations. However, it was noted that accurate S34 calculations require much smaller dipolar subunits. We show that this conclusion is too pessimistic, by examining the sensitivity of the S34 elements on surface roughness of spherical particles. Furthermore we give an example of an accurate S34 calculation with dipolar subunits as large as 1/10 of the wavelength.
DRNTU::Engineering::Computer science and engineering
© 1993 Optical Society of America. This paper was published in Optics Letters and is made available as an electronic reprint (preprint) with permission of Optical Society of America. The paper can be found at the following official DOI: [http://dx.doi.org/10.1364/OL.18.001211]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.