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The frequency regions where a surface wave (SW) exists on a dielectric/metamaterial interface are determined for the case when the metamaterial's refractive index is negative. With allowance for the condi tions of TE and TM SW existence in the structure, the characteristic frequencies that can be controlled with the help of the external magnetic field are calculated. On the basis of dispersion dependences for SWs, it is shown that the TM (TE) wave is forward (backward), and the backward wave is substantially slowed in the structure.

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We have studied the peculiarities of propagation of surface polaritons at a planar interface between an isotropic dielectric and anisotropic nanocomposite with metal inclusions of ellipsoidal shape. For the case when the axes of all nanoellipsoids of revolution are perpendicular to the propagation direction and parallel to the medium interface, we have obtained frequency dependences of the propagation constant and transverse wave vector components, penetration depth and path length, longitudinal and transverse energy fluxes for surface polaritons. The shape of nanoellipsoids is shown to have an effect on the wave characteristics of surface polaritons.