表面晶格扭结孤子
Surface lattice kink solitons
摘要：
我们从理论上预言，在离焦非线性介质中压印的光晶格表面可以支持激波或扭结波。这种新的表面波包含一个调制稳定的基座和强烈的本地化的光晶格的边缘，由于布拉格型反射。扭结陡度和局部化程度可以通过晶格深度来控制。我们发现了两种类型的扭结，表现出不同的稳定性，为每个有限的间隙在晶格谱。我们的发现为光学表面扭折波的实验观测开辟了道路。
英文摘要：
We predict theoretically that surface of an optical lattice imprinted in defocusing nonlinear media can support shock, or kink waves. Such new surface waves contain a modulationally stable pedestal and are strongly localized at the edge of the optical lattice due to Bragg-type reflection. The kink steepness and localization degree can be controlled by the lattice depth. We found two types of kinks, which exhibit distinct stability properties for each finite gap in the lattice spectrum. Our findings open the way to experimental observation of optical surface kink waves.
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