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We investigate surface plasmon polariton waves at the interface between metals or metamaterials and gyrotropic dielectrics. Due to gyrotropy, the surface wave changes its polarization, propagation constant, and transverse profile. With the increase of gyrotropy the localization decreases leading to the existence of the critical value of the gyrotropic coefficient above which there are no localized surface-plasmons at the interface. A method of experimental investigation of gyrotropic films based on the surface-plasmon excitation is proposed.

In this paper we present a comprehensive study of the dynamics of screw phase dislocations under conditions of noncoaxial parametric three-wave mixing in the pump low-depletion regime. Under such conditions the signal and idler fields couple and so, the fields' properties change through propagation in the nonlinear crystal. We present an analytical model and a comprehensive study of the vortical features of the resulting field. The model is compared with the numerical solutions of the full equations. It is shown that by changing the relative amplitude and phase of the initial fields, one can control the domains where creation and annihilation of vortex-antivortex twins lead to different vortex content. We show that the effects studied here are relevant to a variety of physical systems. In particular, we show that the same phenomena are expected to occur in gyrotropic media and photonic crystals.

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This work is devoted to theoretical study of surface plasmon polariton propagation on metal or metamaterial -dielectric interfaces where media can possess optical or magnetooptical activity or cubic nonlinearity. On the interface of gyrotropic media surface wave changes its polarization and profile as well as in case of interface of media with cubic nonlinearity. Surface wave propagation constant can be modified by magnetization leading to magnetooptical intensity effect. The properties of plasmons in gratings are also considered including excitation, dispersion and existence of various types of modes. The theory of surface wave and pulsed beam diffraction in gyrotropic, nonlinear and layered media is developed. We also present waveguide for surface waves based on layered metamaterial -dielectric interfaces suppressing diffraction spreading.