Abstract
We study the s-polarized nonlinear guided and surface electromagnetic waves supported by a three-layer structure consisting of a nonlinear dielectric film, characterized by a Kerr-like dielectric constant, surrounded symmetrically by identical, linear dielectric media. We present numerical results for the effective wave number of these modes as a function of the intensity of the electric field at the lower surface of the nonlinear film for both self-focusing and self-defocusing nonlinear films. A double-valued relation between the effective wave number and the electric field intensity is obtained for certain ranges of the parameters characterizing the structure under investigation. Asymmetric modes in this symmetric structure are found to occur when the nonlinear film is made from a self-defocusing dielectric material.
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