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Appl Opt. 1994 Jan 20;33(3):501-11. doi: 10.1364/AO.33.000501.

Scattering of electromagnetic-plane waves by radially inhomogeneous spheres: a finely stratified sphere model.

Abstract

A new recursive algorithm to calculate the internal and scattered fields of finely stratified inhomogeneous spheres has been developed. No restriction on the number of layers-the thicknesses of which can be arbitrarily small-is imposed by this method. The number of layers is restricted only by the computer's capability: calculations with spheres with more than 10,000 layers were successfully performed with a HP work station. The new algorithm circumvents the limitations introduced by the numerical round-off errors encountered when using the previously developed recursive relations to calculate the ratios of Riccati-Bessel functions. Tests and calculations show that the method is stable and accurate for a large range of size parameters and optical properties. By employing the proposed algorithm, the problems encountered in analyzing the scattering by spheres with continuous-profile refractive indices can be solved with good accuracy.

PMID:
20862042
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