Design and simulation of electromagnetically induced transparent structure based on terahertz metamaterials

Jian Zhang; Ying Li; Bin Li

doi:10.1117/12.2606122

1 November 2021 Design and simulation of electromagnetically induced transparent structure based on terahertz metamaterials

Jian Zhang, Ying Li, Bin Li

Author Affiliations +

Proceedings Volume 12057, Twelfth International Conference on Information Optics and Photonics; 120572V (2021) https://doi.org/10.1117/12.2606122
Event: Twelfth International Conference on Information Optics and Photonics, 2021, Xi'an, China

Abstract

A three-dimensional structure device that realizes electromagnetic-induced transparency (EIT) in the terahertz band is designed. We use metamaterials to simulate electromagnetic-induced transparency phenomena, through the design of effective metamaterial unit structures, acquire high transmittance while achieving strong dispersion, reducing the absorption of light waves by the medium in the slow light process. EIT’s frequency response is expressed as a narrowband transparent window formed in a large block peak. There are two coupling methods for metamaterials to achieve EIT: bright-bright mode coupling and bright-dark mode coupling. Obviously, the structures in the bright-mode coupled metamaterial unit can be directly excited by incident waves to form a resonant mode, that is, there are at least two radiating mode resonators, which are generally two-dimensional planar structures such as double strips, double rings, etc. This work breaks through the traditional planar patch structure, connects the two resonant rings with cylinders, and innovatively constructs a three-dimensional metamaterial unit. We successfully achieve EIT in the range of 1.06THz to 1.41THz, at a resonance frequency of 1.26THz, the two narrow-band resonance peaks of EIT are located at 1.22THz and 1.30 THz. Realizing EIT through terahertz metamaterials, thereby realizing slow light effect, have paved the way for the design of slow-light devices to meet the future demand for ultra-fast optical signal processing and promote the development of next-generation communication technologies.

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Jian Zhang, Ying Li, and Bin Li "Design and simulation of electromagnetically induced transparent structure based on terahertz metamaterials", Proc. SPIE 12057, Twelfth International Conference on Information Optics and Photonics, 120572V (1 November 2021); https://doi.org/10.1117/12.2606122

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KEYWORDS

Metamaterials

3D modeling

Electromagnetism

Slow light

Terahertz metamaterials

Electromagnetic radiation

Terahertz radiation

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