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Dual-band terahertz absorber based on fishing net-shaped graphene material

An absorber and graphene technology, applied in the terahertz field, can solve the problems of large size, low absorption rate, complex structure, etc., and achieve the effect of perfect absorption, simple structure, and easy realization

Inactive Publication Date: 2019-10-25
ANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing absorbers generally have disadvantages such as low absorption rate, complex structure and large size.

Method used

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  • Dual-band terahertz absorber based on fishing net-shaped graphene material
  • Dual-band terahertz absorber based on fishing net-shaped graphene material
  • Dual-band terahertz absorber based on fishing net-shaped graphene material

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] The dual-band terahertz absorber of the present invention is an infinite period structure, including a plurality of absorbing units arranged continuously.

[0024] Such as figure 1 with 2 As shown, the absorber is composed of a plurality of absorber units, and the absorber unit is composed of a metal reflective layer (1), a dielectric layer (2) and a graphene layer (3) arranged in sequence from bottom to top, and the metal reflective layer (1 ), the dielectric layer (2) and the graphene layer (3) are attached to each other; the metal reflection layer (1) is an all-metal film, and the graphene layer (3) is a fishnet-shaped single-layer graphene, and the fishnet-shaped The geometric center of the single-layer graphene, the geometric center of the dielectric layer (2) and the geometric center of the metal reflective layer (1) ar...

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Abstract

The invention discloses a dual-band terahertz absorber based on a fishing net-shaped graphene material. The dual-band terahertz absorber is composed of a plurality of absorber units, wherein each absorber unit is composed of a metal reflecting layer (1), a dielectric layer (2) and a graphene layer (3) which are sequentially arranged from bottom to top, and the metal reflecting layer (1), the dielectric layer (2) and the graphene layer (3) are mutually attached; and the metal reflecting layer (1) is an all-metal film, the graphene layer (3) is fishing net-shaped single-layer graphene, and the geometric center of the fishing net-shaped single-layer graphene, the geometric center of the dielectric layer (2) and the geometric center of the metal reflecting layer (1) are on the same straight line. The dual-band terahertz absorber is simple in graphic structure, does not need multi-layer material stacking and multiple resonators, is easy to integrate, is good in stability, and has the advantages of the high absorption rate, the wide incident angle and high insensitivity to polarization.

Description

technical field [0001] The invention relates to the technical field of terahertz, in particular to a dual-band terahertz absorber based on a fishnet-shaped graphene material. Background technique [0002] Terahertz is an electromagnetic wave with a frequency of 0.1THz to 10THz, which is between millimeter wave and infrared. Before the 1980s, the research on terahertz technology was limited by the effective terahertz generation source and detection means. Compared with the millimeter wave and infrared research, the progress was slow, which was called "terahertz gap". Subsequently, the emergence of femtosecond lasers provided a breakthrough, and terahertz technology was able to develop rapidly. Due to the technical advantages of terahertz waves such as strong penetration, high safety, good orientation, wide frequency band, and high time and space resolution, it makes it an important tool in basic research, astrophysics, materials science and engineering, biomedicine, spectros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q17/00
CPCH01Q17/008
Inventor 胡丹张进峰刘丹
Owner ANYANG NORMAL UNIV
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