Scattering of an oblique incident focused Gaussian beam by a spheroidal particle

作者:Zhao, Wenjuan*; Han, Yiping; Han, Lu
来源:Journal of Quantitative Spectroscopy and Radiative Transfer, 2014, 145: 88-94.
DOI:10.1016/j.jqsrt.2014.04.026

摘要

Based on the expansion of a Gaussian beam in spheroidal coordinates in general case of oblique illumination, a theoretical procedure to determine the scattered fields of spheroid obliquely illuminated by a Gaussian beam is presented. Specific attention is paid to the study of scattering properties of a spheroidal particle from an obliquely incident Gaussian beam. The calculated results for spheroid are compared with those from the surface integral equation method, and very good agreements are observed. Numerical results concerning the influences of shaped beam parameters (beam waist radius, incident angle) as well as spheroid parameters (major axis, minor axis, refractive index, size parameter) on the scattering properties are presented. These results can be used as a reference for other numerical methods to analyze the light scattering by non-spherical particles illuminated by Gaussian beam.