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A Metamaterial Design Based on Electromagnetic Induction Transparency-Like Effect and Its Slow-Wave Performance

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Document pages: 10 pages

Abstract: This paper proposes a new metamaterial design thatcan achieve electromagnetic induction transparency-like (EIT-like) effects inthe microwave band. The unit structure of metamaterials consists of squarerings and metal wires. The square ring acts as the “bright state” and the metalwire acts as the “dark state”. The destructive interference between the brightstate and the dark state produces an EIT-like effect. In the simulationresults, a transparent window centered at 4.00 GHz can be observed in thetransmission spectrum. By studying the phase change of the transparent window,it is found that the group delay of the metamaterial structure can reach 0.39ns at 4.00 GHz. This paper also studies theinfluence of the refractive index of the medium on the EIT-like effect.Numerical simulations show that such metamaterial is very sensitive to therefractive index of the medium, and the sensitivity is 15 mm RIU. Our designcan be extended to other frequency bands and may have potential applications infiltering, sensing, slow-light devices, and nonlinear optics.

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