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Nanomaterials 2019, 9(2), 171; https://doi.org/10.3390/nano9020171

Dynamically Tunable Resonant Strength in Electromagnetically Induced Transparency (EIT) Analogue by Hybrid Metal-Graphene Metamaterials

Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
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Received: 3 January 2019 / Revised: 20 January 2019 / Accepted: 26 January 2019 / Published: 30 January 2019
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Abstract

In this paper, a novel method to realize a dynamically tunable analogue of EIT for the resonance strength rather than the resonance frequency is proposed in the terahertz spectrum. The introduced method is composed of a metal EIT-like structure, in which a distinct EIT phenomenon resulting from the near field coupling between bright and dark mode resonators can be obtained, as well as an integrated monolayer graphene ribbon under the dark mode resonator that can continuously adjust the resonance strength of transparency peak by changing the Fermi level of the graphene. Comparing structures that need to be modulated individually for each unit cell of the metamaterials, the proposed modulation mechanism was convenient for achieving synchronous operations for all unit cells. This work demonstrates a new platform of modulating the EIT analogue and paves the way to design terahertz functional devices which meet the needs of optical networks and terahertz communications. View Full-Text
Keywords: EIT analogue; tunable EIT; graphene ribbon; resonance intensity EIT analogue; tunable EIT; graphene ribbon; resonance intensity
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Lao, C.; Liang, Y.; Wang, X.; Fan, H.; Wang, F.; Meng, H.; Guo, J.; Liu, H.; Wei, Z. Dynamically Tunable Resonant Strength in Electromagnetically Induced Transparency (EIT) Analogue by Hybrid Metal-Graphene Metamaterials. Nanomaterials 2019, 9, 171.

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