Electromagnetic scattering from uniaxial anisotropic bispheres located in a Gaussian beam

Based on the Generalized Lorenz-Mie Theory (GLMT) and generalized multiparticle Mie-solution (GMM), scattering of two interacting homogeneous uniaxial anisotropic spheres with parallel primary optical axes and arbitrary configuration from a Gaussian beam is investigated. By introducing the Fourier transformation, the electromagnetic fields in the uniaxial anisotropic spheres are expanded in terms of the spherical vector wave functions (SVWFs). The interactive scattering coefficients and the expansion coefficients of the internal fields are derived through the continuous boundary conditions on which the interaction of the bispheres is considered. The influences of the beam waist widths, beam center position, and spheres separation distance on scattering characteristics of uniaxial anisotropic bispheres located in a Gaussian beam are numerically analyzed in detail.

► Scattering of a Gaussian beam by uniaxial anisotropic bispheres is investigated. ► Parallel primary optical axes of the anisotropic spheres are considered. ► Interactive, total scattering coefficients are derived using vector addition theorem. ► Accuracy of the theory and codes is verified. ► Scattering performances of uniaxial anisotropic bispheres are numerically discussed.