标题：Kirigami metamaterials for reconfigurable toroidal circular dichroism
作者：Jing, Liqiao; Wang, Zuojia; Zheng, Bin; Wang, Huaping; Yang, Yihao; Shen, Lian; Yin, Wenyan; Li, Erping; Chen, Hongsheng
作者机构：[Jing, Liqiao; Zheng, Bin; Wang, Huaping; Yang, Yihao; Shen, Lian; Yin, Wenyan; Li, Erping; Chen, Hongsheng] Zhejiang Univ, Key Lab Adv Micro Nano Ele 更多
通讯作者：Zheng, B;Chen, HS;Wang, ZJ;Zheng, Bin
通讯作者地址：[Zheng, B; Chen, HS]Zhejiang Univ, Key Lab Adv Micro Nano Elect Devices & Smart Syst, Hangzhou 310027, Zhejiang, Peoples R China;[Wang, ZJ]Shandong Un 更多
来源：NPG ASIA MATERIALS
摘要：The ancient paper craft of kirigami has recently emerged as a potential tool for the design of functional materials. Inspired by the kirigami concept, we propose a class of kirigami-based metamaterials whose electromagnetic functionalities can be switched between nonchiral and chiral states by stretching the predesigned split-ring resonator array. Single-band, dual-band, and broadband circular polarizers with reconfigurable performance are experimentally demonstrated with maximum circular dichroism of 0.88, 0.94, and 0.92, respectively. The underlying mechanism is explained and calculated via detailed analysis of the excited multipoles, including the electric, magnetic, and toroidal dipoles and quadrupole. Our approach enables tailoring the electromagnetic functionalities in kirigami patterns and provides an alternate avenue for reconfigurable optical metadevices with exceptional mechanical properties.