Electromagnetically induced transparency analogue in terahertz range with all-dielectric metasurface

Zhiqiang Zeng; Lianghui Du; Jiang Li; Liguo Zhu

doi:10.1117/12.2656176

16 December 2022 Electromagnetically induced transparency analogue in terahertz range with all-dielectric metasurface

Zhiqiang Zeng, Lianghui Du, Jiang Li, Liguo Zhu

Proceedings Volume 12501, Seventeenth National Conference on Laser Technology and Optoelectronics; 125010N (2022) https://doi.org/10.1117/12.2656176
Event: Seventeenth National Conference on Laser Technology and Optoelectronics, 2022, Shanghai, China

Abstract

An analogue of electromagnetically induced transparency (EIT) in terahertz range with an all-dielectric metasurface is investigated numerically. The unit cell of the silicon-based metasurface is composed of a ring and a rectangular bar. It is found that due to the interaction between the dark mode and the bright mode supported by the ring and the bar, respectively, EIT-like resonance can be realized in this structure. By choosing proper geometrical parameters, the sharp EIT-like transmission peak can be always observed with transmittance higher than 99% and highest Q-factor about 1890. With this high quality EIT resonance, the figure-of-merit for the refractive index sensing of this metasurface is about 260, which is larger the previous reported metal-based metasurfaces. The transmittance property of the EIT-like resonance can be manipulated by changing the structure parameters. This high quality EIT metasurface has great applications in the design of slow-light low-loss equipment, optical modulations, and optical sensing.

Citation Download Citation

Zhiqiang Zeng, Lianghui Du, Jiang Li, and Liguo Zhu "Electromagnetically induced transparency analogue in terahertz range with all-dielectric metasurface", Proc. SPIE 12501, Seventeenth National Conference on Laser Technology and Optoelectronics, 125010N (16 December 2022); https://doi.org/10.1117/12.2656176

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