Cavity-induced backscattering in a two-dimensional photonic topological system
Cavity-induced backscattering in a two-dimensional photonic topological system
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DOI：
10.1103/physrevresearch.2.013221
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发表时间：
2019-11
影响因子：
4.2
通讯作者：
Yuhao Kang;A. Genack
中科院分区：
文献类型：
--
作者：
Yuhao Kang;A. Genack
通过电子，光子和声子材料中的拓扑状态的鲁棒传输的发现加深了我们对凝聚态中波传播的理解，并展望了工程超材料在通信，传感和控制环境中的关键应用。拓扑保护的传输已被证明在面对弯曲的路径和现场的随机性的结构。在这里，我们测量微波辐射在具有时间反演对称性的拓扑介质中的传播，其中腔体邻近边缘通道。耦合共振模型分析表明，该腔不是自旋守恒缺陷，在传输中产生负的时间延迟。
The discovery of robust transport via topological states in electronic, photonic and phononic materials has deepened our understanding of wave propagation in condensed matter with prospects for critical applications of engineered metamaterials in communications, sensing, and controlling the environment. Topological protection of transmission has been demonstrated in the face of bent paths and on-site randomness in the structure. Here we measure the propagation of microwave radiation in a topological medium possessing time reversal symmetry with a cavity adjacent to the edge channel. A coupled-resonance model analysis shows that the cavity is not a spin-conserving defect and gives rise to negative time delay in transmission.