Scattering modeling by a nonlinear slab: exact solution of the full vector problem

Abstract: We present the computation of the scattering of light by a nonlinear slab under conical incidence and arbitrary polarization. We consider an anisotropic slab, fully described by its susceptibility tensors; as a result, the full vector problem must be considered. The two-dimensional problem is reduced to a one-dimensional problem using symmetry arguments, which is then solved by an iterative process using the finite element method. Energetic considerations are also addressed. Several numerical experiments involving a KTP slab are presented, including the incident TE and TM cases.