Wide-angle polarization-insensitive terahertz tri-band absorber

An absorber, three-band technology, applied in the field of metamaterials, can solve the problems of polarization sensitivity and single frequency band, and achieve the effects of high absorption rate, wide incidence angle, and many absorption frequency points.

Pending Publication Date: 2018-03-23
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

Since the first metamaterial absorber was proposed, metamaterials have shown people its extraordinary characteristics, perfect absorption of electromagnetic waves, but in addition to its perfect absorption ch

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  • Wide-angle polarization-insensitive terahertz tri-band absorber
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  • Wide-angle polarization-insensitive terahertz tri-band absorber

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[0016] specific implementation

[0017] Further detailed description will be given below in conjunction with the accompanying drawings and the technical solutions of the present invention.

[0018] combine figure 1 , figure 2 , the three-frequency point metamaterial absorber of the present invention includes a bottom metal layer 1, a polyimide dielectric layer 2 and a top metal design pattern 3; the bottom metal layer 1 and the top metal design pattern 3 are closely covered on the polyimide dielectric layer. Both sides of 2; the dielectric constant of the polyimide dielectric layer is 3.5, the loss tangent value is 0.02, and the thickness is 8 μm; the bottom metal layer and the top metal design pattern adopt the conductivity of 5.96×10 7 S / m, the thickness is 0.2 μm; the lattice constant corresponding to the metamaterial absorber unit involved in the present invention is that the top metal design pattern is composed of three parts: an outer square ring 4, an inner circular ...

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Abstract

The invention relates to a tri-band metamaterial absorber. The metamaterial structure sequentially comprises a bottom total reflection metal layer, a middle loss dielectric layer and a top designed metal pattern layer from bottom to top, and the three structure layers are closely attached. Designed metal patterns are three parts which are mutually separated on the same plane and comprise an external square ring, a middle circular ring and a central cross-like structure with short edges, and the three parts are centric with a square structure unit. The wide-angle polarization-insensitive terahertz tri-band absorber has the advantages of being high in absorption rate, irrelevant to polarization, capable of achieving wide angle incidence and the like, has multiple absorbing frequency points and works in a terahertz wave band.

Description

technical field [0001] The invention belongs to the technical field of metamaterials, in particular to a triple-band metamaterial absorber. Background technique [0002] Synthetic metamaterials have extraordinary electromagnetic properties that conventional materials do not have. On the basis of not violating physical laws, new materials can be synthesized according to people's wishes and break through the restrictions of natural laws, which has attracted widespread attention from scientists and people. In the field of terahertz technology, since there are few materials corresponding to this frequency band in nature, the research on new materials that can be designed according to human wishes is particularly important for breaking through the terahertz blank. Since the first metamaterial absorber was proposed, metamaterials have shown people its extraordinary characteristics, perfect absorption of electromagnetic waves, but in addition to its perfect absorption characteristi...

Claims

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Application Information

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IPC IPC(8): H01Q17/00
CPCH01Q17/00
Inventor 崔子健王玥朱冬颖刘鑫杨德凯雷露
Owner HARBIN UNIV OF SCI & TECH
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