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Graphene adjustable dual-band metamaterial absorber

A technology of absorber and metamaterial, which is applied in the field of optical properties, can solve the problems of wasting materials and wasting time, and achieve the effect of simple structure, easy realization and good absorption effect

Inactive Publication Date: 2020-02-28
ANYANG NORMAL UNIV
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  • Application Information

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Problems solved by technology

However, in practical applications, this method needs to re-manufacture the structure to change the size of the metamaterial absorber and further adjust the frequency of the absorption peak, which is a waste of time and materials. From the perspective of practical application, this This method is not advisable

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  • Graphene adjustable dual-band metamaterial absorber
  • Graphene adjustable dual-band metamaterial absorber
  • Graphene adjustable dual-band metamaterial absorber

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] like Figure 1~2 As shown, a graphene-tunable dual-band metamaterial absorber includes multiple absorbing units arranged continuously along the plane. The absorber unit is composed of the bottom metal film (1), the middle dielectric layer (2) and the top graphene film (3) arranged in sequence from bottom to top, the bottom metal film (1), the middle dielectric layer (2) and the top layer of graphite The graphene films (3) are attached to each other, the bottom metal film (1) is an all-metal film, the top graphene film (3) is a cross-shaped microstructure, the geometric center of the cross-shaped microstructure, and the intermediate dielectric layer (2 ) and the geometric center of the underlying metal film (1) are on a straight line.

[0023] When multiple absorption units are arranged continuously along the plane, the bottom...

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Abstract

The invention provides a graphene adjustable dual-band metamaterial absorber. The metamaterial absorber is composed of a plurality of absorber units, each absorber unit is composed of a bottom metal film (1), a middle dielectric layer (2) and a top graphene film (3) which are sequentially arranged from bottom to top, and the bottom metal film (1), the middle dielectric layer (2) and the top graphene film (3) are attached to one another. The bottom metal film (1) is an all-metal film. The top graphene film (3) is patterned single-layer grapheme. The geometric center of the patterned single-layer graphene, the geometric center of the middle dielectric layer (2) and the geometric center of the bottom metal film (1) are on the same straight line. The metamaterial absorber provided by the invention has the characteristics of high absorptivity, tunable frequency, wide incident angle and polarization insensitivity, and has very high engineering application value.

Description

technical field [0001] The invention relates to the technical field of optical characteristics, in particular to a graphene-tunable dual-band metamaterial absorber. Background technique [0002] High-efficiency absorption of light energy, especially perfect absorption is expected, because perfect absorption can be applied to many fields, such as: imaging, sensing, stealth, detection, etc. To achieve perfect absorption of the device, the selection of suitable materials is a very important issue. Metamaterials are artificial electromagnetic materials arranged periodically. It can control the electromagnetic properties of materials by adjusting the geometry, size and distribution of structures, so as to obtain many novel properties, such as negative refraction, perfect lens, super absorption, etc. The perfect absorber is one of the most important application fields of metamaterials. Since Landy et al. designed and proposed the first perfect metamaterial absorber in 2008, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q17/00
CPCH01Q17/007
Inventor 胡丹王红燕张进峰
Owner ANYANG NORMAL UNIV
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