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Tunable terahertz graphene metamaterial absorber

A graphene and absorber technology, applied in the field of terahertz graphene metamaterial absorbers, can solve problems such as complex structure and preparation process, absorption characteristics cannot be adjusted arbitrarily, and the application range of terahertz metamaterial absorbers is narrow. The effect of low cost and simple process

Inactive Publication Date: 2018-03-13
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

[0004] The present invention proposes a tunable terahertz graphene metamaterial absorber in order to solve the problems of the existing terahertz metamaterial absorber, such as the narrow application range, complex structure and preparation process, and the inability to adjust the absorption characteristics arbitrarily. Can be selected at the same time to achieve flexible adjustment of intensity, bandwidth and frequency

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  • Tunable terahertz graphene metamaterial absorber
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Embodiment Construction

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] combine figure 1 , figure 2 and image 3 , the present invention provides a tunable terahertz graphene metamaterial absorber, including a four-layer structure stacked together: a patterned graphene metamaterial top layer, a dielectric middle layer, a metal bottom layer and a substrate; in the described A metal bottom layer is arranged on the substrate, a dielectric intermediate layer is arranged on the metal bottom layer, an...

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Abstract

The invention provides a tunable terahertz graphene metamaterial absorber. The tunable terahertz graphene metamaterial absorber comprises a four-layer structure laminated together: including a patterned graphene metamaterial top layer, a dielectric middle layer, a metal bottom layer and a substrate; the metal bottom layer is arranged on the substrate; the dielectric middle layer is arranged on themetal bottom layer; and the patterned graphene metamaterial top layer is arranged on the dielectric middle layer. Graphene is adopted to replace the conventional metal structure to establish the terahertz metamaterial absorber, and the Fermi energy of two graphene circular plates are tuned through static doping, so that the resonance characteristic of the two graphene circular plates and the nearfield coupling characteristic between the circular plates can be controlled, thereby realizing flexible control on the absorption strength, bandwidth and frequency of the absorber.

Description

technical field [0001] The invention relates to an absorber that can selectively realize modulation of absorption bandwidth, frequency and intensity at the same time based on electrostatic doping, in particular to a tunable terahertz graphene metamaterial absorber. Background technique [0002] Metamaterial absorber is a new type of electromagnetic wave absorber first proposed by Landy in 2008. It is usually composed of a patterned metal top layer, a dielectric middle layer and a metal floor layer. Compared with traditional electromagnetic wave absorbers, metamaterials Absorbers are lightweight, compact, perfectly absorbed and easy to tune. In recent years, metamaterial absorbers have received extensive attention due to their potential applications in detection, imaging, and sensing. At present, different types of metamaterial absorbers have been theoretically designed and experimentally fabricated, with operating frequencies ranging from the initial microwave frequency ban...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q17/00G02B1/00
CPCG02B1/002H01Q17/008
Inventor 贺训军姚远杨玉强杨文龙吴丰民姜久兴
Owner HARBIN UNIV OF SCI & TECH
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