Gaussian Beam Scattering from a Sphere on or Near a Plane Surface

A theoretical procedure is presented for calculating the scattered fields from a sphere on or near a plane surface. The incident Gaussian beam is expanded in series of cylindrical vector wave functions, and the scattered as well as internal fields in series of spherical ones. By using the boundary conditions and the method of moments technique, the unknown expansion coefficients are determined. Numerical results of the normalized differential scattering cross section are given, and the scattering characteristics are discussed concisely.