Light scattering by a multilayered spheroidal particle

TL;DR

This paper presents an extended boundary condition method for solving light scattering by multilayered spheroidal particles, enabling efficient analysis of complex particle structures with multiple layers and varying porosity.

Contribution

The paper introduces a novel extension of the boundary condition method to multilayered spheroids, improving computational efficiency and accuracy for complex particle geometries.

Findings

Extinction factors converge to average values with more layers.

Extinction varies with particle porosity.

Method is efficient for strongly prolate and oblate spheroids.

Abstract

The light scattering problem for a confocal multilayered spheroid has been solved by the extended boundary condition method (EBCM) with a corresponding spheroidal basis. The solution preserves the advantages of the approach applied previously to homogeneous and core-mantle spheroids, i.e. the separation of the radiation fields into two parts and a special choice of scalar potentials for each of the parts. The method is known to be useful in a wide range of the particle parameters. It is particularly efficient for strongly prolate and oblate spheroids. Numerical tests are described. Illustrative calculations have shown that the extinction factors to converge to average values with a growing number of layers and how the extinction vary with a growth of particle porosity.