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

- The scattering of oblique Gaussian beam by spheroidal particles is investigated.
- The analytic solution is constructed within the framework of the GLMT.
- Numerical results for various parameters of the incident beam and of the spheroid are presented.

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.