A Tunable Spatial Electromagnetic Induction Transparent Metamaterial Device

Abstract

The invention discloses an adjustable and controllable spatial electromagnetic induction transparent metamaterial device. The device comprises a substrate and a metal unit array which is positioned on the substrate and can be used for generating an electromagnetic induction transparent phenomenon, wherein the metal unit array comprises a plurality of metal units which are distributed in an array form; each metal unit comprises a first metal microstructure and a second metal microstructure; each first metal microstructure comprises a first metal pattern; each second metal microstructure comprises a second metal pattern; each first metal microstructure and / or each second metal microstructure further comprises a semiconductor element. By adopting the adjustable and controllable spatial electromagnetic induction transparent metamaterial device, the problem of incapability of easily and rapidly adjusting and controlling the working frequency of the electromagnetic induction transparent metamaterial in the prior art can be effectively solved, and a large modulation depth and a high switching speed can be realized. The device can be widely applied to the technical fields of slow light modulation, optical switches, sensors, wireless communication and the like.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic functional materials, and more specifically relates to an adjustable spatial electromagnetic induction transparent metamaterial device. Background technique [0002] The phenomenon of Electromagnetically Induced Transparency (EIT) is generated by quantum interference in the interaction system between light and atoms. Through the interaction between the external electromagnetic field and the medium, the absorption coefficient of the medium for a certain light changes, and the incident light The absorption is reduced or even no longer absorbed, so that its transmittance increases. This phenomenon leads to drastic changes in the dispersion at the EIT, which makes the EIT phenomenon have potential applications in the fields of slow light, sensors, and optical switches. However, in the actual process, the generation of EIT requires very complicated devices and harsh conditions, which greatly r...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides an adjustable spatial electromagnetic induction transparent metamaterial device, which can effectively solve the problem that the working frequency of EIT-MMs cannot be adjusted simply and quickly in the prior art , can obtain higher modulation depth (above 80%) and switching speed (10 -9 s)

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