Abstract
The types of nonlinear surface waves of extraordinary polarization that occur at the interface between a photorefractive crystal and a medium with positive Kerr nonlinearity are described. It is shown that nonlinear surface waves of an asymmetric profile of two types can exist in such a system. The waves of the first type decay when moving away from the interface without oscillations both in the depth of the photorefractive crystal and in the Kerr crystal, and the waves of the second type decay in the depth of the photorefractive crystal with oscillations. Dispersion relations are obtained, and the conditions for the existence of all the described types of waves are indicated depending on the optical characteristics of the crystals.
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