Topological Boundary Modes from Translational Deformations
Topological Boundary Modes from Translational Deformations
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平移变形的拓扑边界模式
DOI：
10.1103/physrevlett.124.073901
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发表时间：
2020-02-21
影响因子：
8.6
通讯作者：
Shindou, Ryuichi
中科院分区：
文献类型：
--
作者：
Nakata, Yosuke;Ito, Yoshitaka;Shindou, Ryuichi
当周期势受到缺陷扰动或在其表面终止时，定域态普遍出现。在这封信中，我们从理论和实验上证明了一种机制，通过连续平移变形的周期性电位产生局域态。我们提供了一个严格的证明下的变形的局域态的出现。该机制在微波光子晶体中得到了实验验证。我们还展示了平移光子晶体反射波的拓扑相位绕组。
Localized states universally appear when a periodic potential is perturbed by defects or terminated at its surface. In this Letter, we theoretically and experimentally demonstrate a mechanism that generates localized states through continuous translational deformations of periodic potentials. We provide a rigorous proof of the emergence of the localized states under the deformations. The mechanism is experimentally verified in microwave photonic crystals. We also demonstrate topological phase windings of reflected waves for translated photonic crystals.