Anomalous broadband Floquet topological metasurface with pure site rings  

作　　者：Zhiwei Guo Xian Wu Yong Sun Haitao Jiang Ya-Qiong Ding Yunhui Li Yewen Zhang Hong Chen 

机构地区：[1]Tongji University,Key Laboratory of Advanced Microstructure Materials,School of Physics Science and Engineering,Shanghai,China [2]University of Shanghai for Science and Technology,Science College,Shanghai,China

出　　处：《Advanced Photonics Nexus》2023年第1期53-60,共8页先进光子学通讯（英文）

基　　金：the financial support from the National Key R&D Program of China(Grant No.2021YFA1400602);the National Natural Science Foundation of China(Grant Nos.12004284,11974261,91850206,and 61621001);the Fundamental Research Funds for the Central Universities(Grant No.22120210579);the Shanghai Chenguang Plan(Grant No.21CGA22).

摘　　要：Photonic and acoustic topological insulators exhibiting one-way transportation that is robust against defects and impurities are typically realized in coupled arrays of two-dimensional ring resonators.These systems have produced a series of applications,including optical isolators,delay lines,and lasers.However,the structures are complicated because an additional coupler ring between neighboring rings is needed to construct photonic pseudospin.A photonic anomalous Floquet topological insulator is proposed and experimentally demonstrated in the microwave regime.This improved design takes advantage of the efficient and backward coupling of negative-index media.The results contribute to the understanding of topological structures in metamaterials and point toward a unique direction for constructing useful topological photonic devices.

关 键 词：topological edge states circuit-based metamaterials backward coupling topological photonics 

分 类 号：O15[理学—数学]