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01802nam a2200265Ia 4500 |
| 001 |
10.3389-fphy.2021.739465 |
| 008 |
220427s2021 CNT 000 0 und d |
| 020 |
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|a 2296424X (ISSN)
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| 245 |
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|a Actively Controlled Frequency-Agile Fano-Resonant Metasurface for Broadband and Unity Modulation
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| 260 |
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|b Frontiers Media S.A.
|c 2021
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| 856 |
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|z View Fulltext in Publisher
|u https://doi.org/10.3389/fphy.2021.739465
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|a The active control to the local resonant mode of metasurface is a promising route for improving the operation bandwidth limitation of metasurface. Here, we propose and experimentally demonstrated the active tunabilities in a frequency-agile Fano-resonant metasurface. The metasurface with a pair of asymmetric split ring resonators is integrated with double varactor diodes for active control of the sharp Fano resonance. It is found that the sharp Fano-type spectrum appears due to the near-field interferences between the collective electric and magnetic dipole modes. The physical insight is revealed through local field analysis, multipole decomposition and temporal coupled-mode theory. It is also found that the metasurface can be employed as a broadband and unity modulator. Hopefully, our results could inspire sophisticated electrically controlled photonic devices with novel functions. © Copyright © 2021 Yang, Fu, Fan, Xu, Zhu, Cai and Zhang.
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|a fano resonance
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|a frequency-agile metasurfaces
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|a modulator
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|a temporal coupled-mode theory
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|a varactor diodes
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|a Cai, W.
|e author
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|a Fan, Y.
|e author
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|a Fu, Q.
|e author
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|a Xu, J.
|e author
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|a Yang, R.
|e author
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|a Zhang, F.
|e author
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|a Zhu, W.
|e author
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| 773 |
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|t Frontiers in Physics
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