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首页> 外文期刊>Journal of Experimental and Theoretical Physics >Nonlinear Surface Waves at the Interface between Optical Media with Different Nonlinearity Induction Mechanisms
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Nonlinear Surface Waves at the Interface between Optical Media with Different Nonlinearity Induction Mechanisms

机译：具有不同非线性感应机制的光学介质之间的界面处的非线性表面波

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摘要

Different types of nonlinear surface waves with a peculiar polarization, which emerge at the interface between a photorefractive crystal and a medium with Kerr nonlinearity, are described. The cases of focusing and defocusing nonlinearity are considered. It is shown that several types of nonlinear surface waves with an asymmetric profile can exist in such a system. Waves of one type attenuate with increasing distance from the interface without oscillations towards the bulk of the photorefractive crystal as well as the Kerr crystal, while waves of another type decay with oscillations. Two types of localized states differing in the form of field damping with and without oscillations can exist near the interface between the photorefractive crystal and the medium with defocusing Kerr nonlinearity. Dispersion relations are obtained and the conditions for the existence of all aforementioned types of waves depending on the optical characteristics of the crystals are indicated. Exact solutions to dispersion equations are obtained in explicit analytic form; these solutions describe the dependence of the propagation constant on the optical characteristics of the crystals.
机译：描述了具有特殊极化的不同类型的非线性表面波，其在光反射晶体和带kerr非线性的介质之间的界面处出现。考虑了聚焦和散焦非线性的案例。结果表明，在这种系统中可以存在具有不对称轮廓的几种类型的非线性表面波。一种类型的波浪随着距离界面的距离增加而没有朝向光反射晶体的大部分以及克尔晶体的距离，而另一种类型的衰减与振荡的波浪。两种类型的局部状态不同于具有振荡和不振荡的田间阻尼的形式，可以在光焦晶体和具有散焦克尔非线性的介质之间的界面附近存在。得到了分散关系，并指示根据晶体的光学特性存在的所有上述波的存在条件。以明确的分析形式获得对色散方程的精确解;这些解决方案描述了传播常数对晶体的光学特性的依赖性。

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