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Volume 11
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10.3390/cryst11020164
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Article

Multi-Band Electromagnetically-Induced-Transparency Metamaterial Based on the Near-Field Coupling of Asymmetric Split-Ring and Cut-Wire Resonators in the GHz Regime

by
Man Hoai Nam
1,
Vu Thi Hong Hanh
2,
Nguyen Ba Tuong
1,3,
Bui Son Tung
1,3,*,
Bui Xuan Khuyen
1,3,
Vu Dinh Lam
3,
Liang Yao Chen
4 and
Young Pak Lee
4,5,*
1
Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
2
Thai Nguyen University of Education, Thai Nguyen University, Thai Nguyen 250000, Vietnam
3
Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
4
Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China
5
Department of Physics, Quantum Photonic Science Research Center and RINS, Hanyang University, Seoul 04763, Korea
*
Authors to whom correspondence should be addressed.
Crystals 2021, 11(2), 164; https://doi.org/10.3390/cryst11020164
Submission received: 8 January 2021 / Revised: 2 February 2021 / Accepted: 4 February 2021 / Published: 6 February 2021
(This article belongs to the Special Issue Advances in Metamaterials)
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Abstract

A metamaterial (MM), mimicking electromagnetically-induced transparency (EIT) in the GHz regime, was demonstrated numerically and experimentally by exploiting the near-field coupling of asymmetric split-ring and cut-wire resonators. By moving the resonators towards each other, the original resonance dip was transformed to a multi-band EIT. The phenomenon was explained clearly through the excitation of bright and dark modes. The dispersion characteristic of the proposed MM was also investigated, which showed a strongly-dispersive behavior, leading to a high group index and a time delay of the MM. Our work is expected to contribute a simple way to develop the potential devices based on the multi-band EIT effect.
Keywords: metamaterial; electromagnetically-induced transparency; multi-band; bright-bright coupling; bright-dark coupling metamaterial; electromagnetically-induced transparency; multi-band; bright-bright coupling; bright-dark coupling
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MDPI and ACS Style

Nam, M.H.; Hanh, V.T.H.; Tuong, N.B.; Tung, B.S.; Khuyen, B.X.; Lam, V.D.; Chen, L.Y.; Lee, Y.P. Multi-Band Electromagnetically-Induced-Transparency Metamaterial Based on the Near-Field Coupling of Asymmetric Split-Ring and Cut-Wire Resonators in the GHz Regime. Crystals 2021, 11, 164. https://doi.org/10.3390/cryst11020164

AMA Style

Nam MH, Hanh VTH, Tuong NB, Tung BS, Khuyen BX, Lam VD, Chen LY, Lee YP. Multi-Band Electromagnetically-Induced-Transparency Metamaterial Based on the Near-Field Coupling of Asymmetric Split-Ring and Cut-Wire Resonators in the GHz Regime. Crystals. 2021; 11(2):164. https://doi.org/10.3390/cryst11020164

Chicago/Turabian Style

Nam, Man Hoai, Vu Thi Hong Hanh, Nguyen Ba Tuong, Bui Son Tung, Bui Xuan Khuyen, Vu Dinh Lam, Liang Yao Chen, and Young Pak Lee. 2021. "Multi-Band Electromagnetically-Induced-Transparency Metamaterial Based on the Near-Field Coupling of Asymmetric Split-Ring and Cut-Wire Resonators in the GHz Regime" Crystals 11, no. 2: 164. https://doi.org/10.3390/cryst11020164

APA Style

Nam, M. H., Hanh, V. T. H., Tuong, N. B., Tung, B. S., Khuyen, B. X., Lam, V. D., Chen, L. Y., & Lee, Y. P. (2021). Multi-Band Electromagnetically-Induced-Transparency Metamaterial Based on the Near-Field Coupling of Asymmetric Split-Ring and Cut-Wire Resonators in the GHz Regime. Crystals, 11(2), 164. https://doi.org/10.3390/cryst11020164

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