Photonics Research, 2019, 7 (9): 09000955, Published Online: Aug. 2, 2019  

Active control of EIT-like response in a symmetry-broken metasurface with orthogonal electric dipolar resonators Download: 535次

Author Affiliations
1 Research & Development Institute in Shenzhen, Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education, and Department of Applied Physics, School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi’an 710072, China
2 School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China
3 e-mail: fuquanhong@nwpu.edu.cn
4 e-mail: fuli.zhang@nwpu.edu.cn
Abstract
The active control of electromagnetic response in metamaterial and mutual coupling between resonant building blocks is of fundamental importance in realizing high-quality metamaterials. In this work, we propose and experimentally demonstrate the tunabilities of symmetry-broken metasurfaces made of orthogonal electric dipolar resonators. The metasurface with vertical and horizontal wires is integrated with a PIN diode for active control. It is found that the electromagnetically induced transparency (EIT)-like spectrum appears due to the destructive or constructive interferences between the two electric dipolar modes when the structural symmetry broken is introduced to the metasurface. Different from previous works on the EIT-like effect, there is only electric dipole response in our metasuface. The microscopic response of the metasurface is numerically calculated to illustrate the mode coupling between the orthogonal electric dipolar resonators. By applying temporal coupled-mode theory, the interaction between the electromagnetic wave and the symmetry-broken metasurface is described, and the characteristic parameters of the resonator system, which determine the electromagnetic response of the metasurface, are acquired.

Ruisheng Yang, Quanhong Fu, Yuancheng Fan, Weiqi Cai, Kepeng Qiu, Weihong Zhang, Fuli Zhang. Active control of EIT-like response in a symmetry-broken metasurface with orthogonal electric dipolar resonators[J]. Photonics Research, 2019, 7(9): 09000955.

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