Internal and near-surface field distributions for a spheroidal particle illuminated by a focused Gaussian beam: On-axis case

Within the framework of the generalized Lorenz-Mie theory (GLMT), scattering from a homogeneous spheroidal particle illuminated by an on-axis Gaussian beam is formulated analytically, with more attention paid to the investigation of internal and near-surface fields. Numerical results concerning the spatial distributions of internal and near-surface fields are presented. This study may be useful to provide some physical insights to the understanding of focused beam scattering by nonspherical particles.

► Internal and near-surface field spatial distributions of a spheroid are investigated. ► Analytic solution is constructed within the framework of the GLMT. ► Numerical results concerning spatial distributions for a spheroid under Gaussian-beam illumination are presented.