Journal
JOURNAL OF APPLIED PHYSICS
Volume 128, Issue 6, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/5.0012575
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Funding
- Fundamental Research Funds for the Central Universities [NS2015077]
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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.
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