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Terahertz broadband absorber based on superposition of circular and square metal structures

A metal structure and absorber technology, applied in the terahertz field, can solve problems such as low absorption rate and narrow bandwidth, and achieve the effect of easy integration and simple structure

Inactive Publication Date: 2018-02-02
TIANJIN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current terahertz metamaterial absorber still has the disadvantages of low absorption rate and narrow bandwidth. Therefore, the present invention proposes a terahertz broadband absorber based on the superimposition of ring and square metal structures.

Method used

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  • Terahertz broadband absorber based on superposition of circular and square metal structures
  • Terahertz broadband absorber based on superposition of circular and square metal structures
  • Terahertz broadband absorber based on superposition of circular and square metal structures

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Embodiment Construction

[0020] Such as figure 1 As shown, the cross-section of the absorber unit is square, and consists of a base layer, a metal film layer, a dielectric layer 1, a square metal layer, a dielectric layer 2 and a circular metal layer from bottom to top. The square metal layer is composed of 4 square metal structures of different sizes, and the ring metal layer is composed of 4 ring metal structures of different sizes.

[0021] In the periodic unit structure of the absorber, the cross-sectional dimensions of the base layer, the metal thin film layer, the dielectric layer 1 and the dielectric layer 2 are all 120 μm×120 μm, and their geometric centers coincide.

[0022] In the periodic unit structure of the absorber, the material of the base layer is silicon and the thickness is 10 μm.

[0023] In the periodic unit structure of the absorber, the materials of the ring metal layer, the square metal layer and the metal film layer are noble metal gold with the same electrical conductivity, ...

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Abstract

The invention discloses a terahertz broadband absorber based on superposition of circular and square metal structures, which is characterized in that an absorber unit is square in cross section and sequentially formed by a basal layer, a metal film layer, a dielectric layer 1, a square metal layer, a dielectric layer 2 and a circular metal layer from the bottom up, the square metal layer is formedby four square metal structures which are different in size, and the circular metal layer is formed by four circular metal structures which are different in size. A strong-absorption broadband terahertz absorber for the terahertz band is obtained by using a method of transverse superposition of identical metal structures and longitudinal superposition of different metal structures.

Description

technical field [0001] The invention relates to the technical field of terahertz, and in particular to the invention discloses a terahertz broadband absorber based on the superimposition of a circular ring and a square metal structure. Background technique [0002] Terahertz waves refer to electromagnetic waves with a frequency between 0.1-10 THz located between microwaves and infrared in the electromagnetic spectrum. With the development of high-efficiency radiation sources and high-sensitivity detection technology, suitable light sources and detection methods have been provided for the terahertz wave band, resulting in the rapid development of terahertz wave science and technology, and people's understanding of terahertz waves has also been continuously deepened. , found that it has important application value in wireless communication, radar imaging, environmental detection and so on. However, as a necessary part of the terahertz application system, the research on terah...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q17/00G02B5/00
CPCG02B5/003H01Q17/008
Inventor 白晋军葛梅兰邓辉斌孙晓东李吉宁范飞常胜江
Owner TIANJIN POLYTECHNIC UNIV
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