Abstract

This work has proposed a classical electromagnetically induced transparency (EIT) at spoof localized surface plasmon metasurface (S-LSP) realized by only one connected metallic elementary unit cell. The excited electric dipole and magnetic dipole from S-LSPs almost overlap in the extreme narrow frequency band, which satisfies the condition of classical EIT occurring. This metasurface structure increases another possibility relative to the early bright-dark mode classical EIT with separated resonances. Moreover, under the microwave band, our proposed classical EIT has high $ Q $ value (up to 311) and group index (up to 30.913) compared to the recent classical EIT or passive microwave devices around the same working frequency.

© 2021 Optical Society of America

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