Actively Controlled Frequency-Agile Fano-Resonant Metasurface for Broadband and Unity Modulation

• DOI: 10.3389/fphy.2021.739465
• Publication Date: 2021-09-04T09:32:20Z
• Authors: Ruisheng Yang; Quanhong Fu; Yuancheng Fan; Jing Xu; Wei Zhu; Weiqi Cai; Fuli Zhang
• Keywords: Fano resonance; Fano plane; Varicap; Modulation (music)

The active control to the local resonant mode of metasurface is a promising route for improving operation bandwidth limitation metasurface. Here, we propose and experimentally demonstrated tunabilities in frequency-agile Fano-resonant with pair asymmetric split ring resonators integrated double varactor diodes sharp Fano resonance. It found that Fano-type spectrum appears due near-field interferences between collective electric magnetic dipole modes. physical insight revealed through field analysis, multipole decomposition temporal coupled-mode theory. also can be employed as broadband unity modulator. Hopefully, our results could inspire sophisticated electrically controlled photonic devices novel functions.