UNIAXIAL NONLINEAR SURFACE-WAVES

In this paper, we present calculations describing the fundamental and higher-order stationary nonlinear surface waves that exist al the boun dary between a nonlinear self-focusing medium and a uniaxial linear me dium. Purely TE or TM solutions do not exist. The solutions obtained a re elliptically polarized, and the polarization varies as a function o f the transverse coordinate normal to the dielectric interface plane. As a result, these nonlinear surface waves exhibit the phenomenon of a self-walkoff in the Poynting vector. Power dispersion curves and simp le analytic expressions for the surface wave threshold as a function o f the angle between the crystal axis and propagation direction for the surface wave are obtained and presented.