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A graphene-based polarization-dependent tunable terahertz wave absorber

A graphene-dependent technology, applied in the field of terahertz absorbers, can solve difficult problems such as different polarization selection and adjustment, and achieve the effects of easy preparation and use, improved absorption rate, and simple structure

Active Publication Date: 2022-07-08
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A single local resonant unit structure has many advantages, but once the unit structure is determined, the selectivity of its polarization absorption is fixed, and it is difficult to adjust different polarization options
Because a single local resonant unit is difficult to select by other means

Method used

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  • A graphene-based polarization-dependent tunable terahertz wave absorber
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  • A graphene-based polarization-dependent tunable terahertz wave absorber

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Embodiment

[0040] The present invention is a graphene-based polarization-dependent tunable terahertz wave absorber, the structure is as follows figure 1 , figure 2 , image 3 and Figure 4 As shown, it includes a plurality of wave absorbing unit layers, specifically a metal structure unit layer, a dielectric layer 6 and a metal bottom plate arranged in sequence from the top to the bottom, wherein the dielectric layer is the substrate, the three-layer structure is closely attached, and the substrate is laid On the upper surface of the metal base plate; the metal structural unit layer is laid on the upper surface of the substrate, and the metal structural unit layer includes four H-type metal plates with the same specifications, and the four H-type metal plates are the first H-type metal plate 1, The second H-shaped metal plate 2, the third H-shaped metal plate 3 and the fourth H-shaped metal plate 5, the first H-shaped metal plate 1 and the fourth H-shaped metal plate 5 are symmetrical...

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Abstract

The invention discloses a terahertz wave absorber with adjustable polarization dependence based on graphene, and relates to the technical field of terahertz wave absorbers. A metal structural unit layer, a dielectric layer and a metal layer are sequentially arranged from top to bottom. , the three-layer structure is closely attached, the dielectric layer is laid on the upper surface of the metal layer, the metal structural unit layer is laid on the upper surface of the dielectric layer, and the dielectric layer is also laid with linear graphene, so The metal structural unit layer includes four H-shaped metal plates with the same specifications, the metal reflector is made of gold, and the dielectric layer is made of polyimide. The structure and size are designed, single-layer graphene is loaded on the terahertz metasurface, and the absorption rate of the metasurface to TE and TM waves is controlled by adjusting the chemical potential of graphene, so that the terahertz absorber can obtain the absorption rate of TE waves in the terahertz band. Good absorption rate, and at the same time, the voltage regulation of the absorption rate of TM wave is realized.

Description

technical field [0001] The invention relates to the technical field of terahertz wave absorbers, in particular to a graphene-based terahertz wave absorber with adjustable polarization dependence. Background technique [0002] Terahertz absorbers can effectively identify different polarized waves, and have potential applications in the fields of high-resolution imaging and secure communications. Therefore, in information processing, terahertz absorbers are very important. Tunable polarization dependence has been lacking in terahertz absorbers. Tunable polarization dependence means that the upper absorption rate of the device for different polarized waves can be adjusted according to requirements. [0003] Conventional absorbers usually consist of a single local resonant unit structure. A single local resonance unit structure has many advantages, but once the unit structure is determined, the selectivity of its polarization absorption is fixed, and it is difficult to adjust...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q17/00H01Q15/00G02B5/00
CPCH01Q17/008H01Q15/0086G02B5/003
Inventor 冉佳彭东亮李森茂李阳张思文
Owner CHONGQING UNIV OF POSTS & TELECOMM
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