非局域非线性介质中的表面波研究

Surface Waves in Nonlocal Nonlinear Media

为了实现对仪器设备的全光控制,基于修正的非局域非线性薛定谔方程,利用数值方法研究具有阶跃线性折射率分布的非局域非线性介质中表面波的性质。结果表明:非局域程度大小显著影响着表面波的性质,在线性折射率强度和能流保持一定的情况下,随着非局域程度增大,表面波的峰值振幅逐渐减小,表面波中心偏离界面距离逐渐越大,表面波的传播常数逐渐减小;线性折射率强度大小显著影响着表面波的性质,在非局域程度和能流持一定的情况下,随着线性折射率强度逐渐增大,表面波的峰值振幅略微增大后基本保持不变,表面波的中心偏离界面的距离逐渐变大且趋于饱和,表面波的传播常数几乎线性增加;能流大小也显著影响着表面波的性质,在非局域程度和线性折射率强度一定的情况下,随着能流增大,表面波的峰值振幅增大,表面波的中心偏离界面的距离减小,表面波的传播常数增大。

In order to realize all-optical control of instruments, based on modified nonlocal nonlinear Schr?dinger equation, the properties of surface waves in nonlocal nonlinear media with step linear refractive index distribution are studied numerically. The results show that the amplitude of the peak of the surface wave decreases with the increase of the degree of nonlocality while the intensity of the linear refractive index and the energy flow remain constant, the propagation constant of the surface wave decreases with the increase of the distance from the center of the surface wave to the interface, and the strength of the LINEAR refractive index affects the properties of the surface wave, with the increase of the intensity of the linear index, the peak amplitude of the surface wave remains unchanged, the distance from the center of the surface wave to the interface becomes larger and more saturated, and the propagation constant of the surface wave increases almost linearly The energy flux also affects the properties of the surface wave. With the increase of the energy flux, the peak amplitude of the surface wave increases and the distance of the center of the surface wave from the interface decreases, the propagation constant of surface waves increases.