P-POLARIZED NONLINEAR SURFACE POLARITONS IN A LAYER WITH INTENSITY-DEPENDENT DIELECTRIC FUNCTION
Journal Title: Наукові праці. Серія "Комп’ютерні технології" - Year 2017, Vol 307, Issue 295
Abstract
Properties of p-polarized nonlinear surface polaritons (NLSP) have been investigated theoretically in a number of papers. But several simplifications which essentially reduce the generality of the results and limit the possibility of their application for realistic all-optical processing devices were used in most of these papers. For example, the field-dependent dielectric function was supposed to be unsaturated, a dependence of the dielectric function of one of the field components (transverse or longitudinal) was neglected, only modes of the lowest order were considered. In the paper p-polarized nonlinear surface polaritons (NLSP) propagating along a layer with intensity-dependent dielectric function bounded by linear media have been investigated. The dielectric function can depend on the field intensity in an arbitrary way. The exact solution which defines profiles of the NLSP field components, the NLSP propagation constant and energy flux for physically realizable modes of all order was obtained. The NLSP field profiles are defined as parametrical dependence between magnitudes of the field components and transverse coordinate on value of the nonlinear dielectric function in the layer. The NLSP propagation constant, energy flux and the thickness of the layer are parametrically dependent on values of the nonlinear dielectric function at the surfaces of the layer. The general solution was applied to the model in which the nonlinear dielectric function of the layer is Kerr-like for weak fields and tends to the saturation level for strong fields and the analytical solution for this case was obtained.
Authors and Affiliations
N. І. Siddelev, A. D. Groza
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