Abstract

We extend the previously proposed concept of equiphase sphere (EPS) to analyze light-scattering properties of arbitrarily shaped particles. Our analyses based on the Wentzel-Kramers-Brillouin technique and numerical studies based on the finite-difference time-domain method demonstrate that a wide range of irregularly shaped particles can be approximated as their equivalent equiphase ellipsoids to determine their total scattering cross-section (TSCS) spectra. As a result, a simple expression given by the EPS approximation can be used to calculate the TSCS spectra of these particles. We find that the accuracy of the EPS approximation is influenced by both the magnitude and the geometric scale of the surface perturbation of the particle, and we derive validity conditions of the EPS approximation to guide the practical application of this method.

© 2004 Optical Society of America

Analytical techniques for addressing forward and inverse problems of light scattering by irregularly shaped particles

Xu Li, Zhigang Chen, Jianmin Gong, Allen Taflove, and Vadim Backman
Opt. Lett. 29(11) 1239-1241 (2004)

Concept of the equiphase sphere for light scattering by nonspherical dielectric particles

Zhigang Chen, Allen Taflove, and Vadim Backman
J. Opt. Soc. Am. A 21(1) 88-97 (2004)

Analytical expressions for characteristics of light scattering by arbitrarily shaped particles in the WKB approximation

Aleksey V. Malinka
J. Opt. Soc. Am. A 32(7) 1344-1351 (2015)

Effect of particle asphericity on single-scattering parameters: comparison between Platonic solids and spheres

Ping Yang, George W. Kattawar, and Warren J. Wiscombe
Appl. Opt. 43(22) 4427-4435 (2004)

Integral light-scattering and absorption characteristics of large, nonspherical particles

Alexander A. Kokhanovsky and Andreas Macke
Appl. Opt. 36(33) 8785-8790 (1997)