Anomalous Wave Propagation in Topological Transition Metasurfaces
Anomalous Wave Propagation in Topological Transition Metasurfaces
复制标题
DOI：
10.1002/adom.201801483
复制
发表时间：
2019-03
影响因子：
9
通讯作者：
Peixia Zheng;Quan Xu;Xiaoqiang Su;Dongyang Wang;Yuehong Xu;Xueqian Zhang;Yanfeng Li;Z. Tian;J. Gu;Liyuan Liu;C. Ouyang;Jiaguang Han;Weili Zhang
中科院分区：
文献类型：
--
作者：
Peixia Zheng;Quan Xu;Xiaoqiang Su;Dongyang Wang;Yuehong Xu;Xueqian Zhang;Yanfeng Li;Z. Tian;J. Gu;Liyuan Liu;C. Ouyang;Jiaguang Han;Weili Zhang
超表面不仅成为控制自由空间波的有效途径，而且也成为控制表面等离子体激元（SPP）的有效途径。表面等离子体在金属和电介质的界面上沿着传播，表现出强的局部场增强特性。由于这些基本功能，操纵超表面中的SPP在当前的研究中特别感兴趣。在这里，当SPP穿过两个本征模等频轮廓拓扑结构不同的超表面之间的界面时，呈现了异常SPP传播的观察。通过组合各种互补的Meta谐振器，SPP传播准备好在拓扑过渡界面处随意重定向。所提出的集成超颖表面为异常波的传播和引导开辟了前所未有的途径，显示出设计光子器件的卓越能力。
Metasurfaces become an effective route to the control of not only free‐space waves but also surface plasmon polaritons (SPPs). SPPs, propagating along the interface between a metal and a dielectric, show properties of strong enhancement of the local field. Thanks to these essential functionalities, manipulating SPPs in metasurfaces is of particular interest in current research. Here, observation of anomalous SPP propagation is presented when SPPs traverse an interface between two metasurfaces whose topologies of eigenmode equal‐frequency contours are different. By combining various complementary meta‐resonators, SPP propagation was ready to be redirected at the topological transition interface at will. The proposed integrated metasurfaces open unprecedented avenues for anomalous wave propagation and guidance, showing exceptional capabilities for designing photonic devices.