A planar metamaterial based on metallic rectangular-ring pair for narrow electromagnetically induced transparency-like effect

We design numerically and demonstrate experimentally a planar metamaterial with a narrow band electromagnetically induced transparency (EIT)-like resonance at microwave frequencies. The meta-molecule, consisting of a pair of metallic rectangular rings connected by a top metallic strip, is mirror sym...

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Veröffentlicht in:Journal of applied physics 2020-08, Vol.128 (6)
Hauptverfasser: Yin, Xiao-gang, Wu, Ming-qi, Liu, You-wen, Huang, Cheng-ping
Format: Artikel
Sprache:eng
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Zusammenfassung:We design numerically and demonstrate experimentally a planar metamaterial with a narrow band electromagnetically induced transparency (EIT)-like resonance at microwave frequencies. The meta-molecule, consisting of a pair of metallic rectangular rings connected by a top metallic strip, is mirror symmetric with respect to the exciting electric field of the normally incident wave. The coupling between a broad bright mode (electric dipole) of the whole meta-molecule and a sharp dark mode (electric quadrupole) belonging only to the rectangular-ring pair can efficiently induce an ultra-narrow EIT-like resonance. By using a coupled-resonator model that shows good accordance with the numerical and experimental results, the observed effect can be well explained. Our design provides another way to realize the sharp EIT-like behavior with strong dispersion and the slow-wave effect, which may find potential applications in constructing the slow-wave devices, filters, and sensors.
ISSN:0021-8979
1089-7550
DOI:10.1063/5.0012575