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首页> 外文期刊>Optics Letters >Topological interface states in multiscale spoof-insulator-spoof waveguides
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Topological interface states in multiscale spoof-insulator-spoof waveguides

机译:多尺度欺骗-绝缘体-欺骗波导中的拓扑界面状态

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The spoof-insulator-spoof (SIS) structure can serve as a waveguide for spoof surface plasmon polaritons (spoof SPPs). If a periodic geometry modulation in the wavelength scale is introduced to the SIS waveguide, this multiscale SIS (MSIS) waveguide possesses band gaps for spoof SPPs analogous to the band gaps in a photonic crystal. Inspired by the topological interface states found in photonic crystals, we construct an interface by connecting two MSIS waveguides with different topological properties (inverted Zak phases of bulk bands). The topological interface states in the MSIS waveguides are observed experimentally. The measured decay lengths of the interface states agree excellently with the numerical results. These localized interface states may find potential applications in miniaturized microwave devices. (C) 2016 Optical Society of America
机译:欺骗绝缘体-欺骗(SIS)结构可以用作欺骗表面等离振子极化子(欺骗SPP)的波导。如果将波长尺度上的周期性几何调制引入SIS波导,则该多尺度SIS(MSIS)波导将具有欺骗性SPP的带隙,类似于光子晶体中的带隙。受光子晶体中发现的拓扑界面状态的启发,我们通过连接两个具有不同拓扑特性(体带的倒Zak相)的MSIS波导来构建界面。通过实验观察MSIS波导中的拓扑界面状态。所测量的界面态的衰减长度与数值结果非常吻合。这些局部接口状态可能会在微型微波设备中找到潜在的应用。 (C)2016美国眼镜学会

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