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Terahertz electromagnetic absorber based on metamaterial

An electromagnetic absorber and terahertz technology, applied in the field of terahertz electromagnetic absorbers, can solve the problems of insufficient absorption frequency band bandwidth, poor absorption performance, limited bandwidth, etc., and achieve superior absorption performance, improved absorption effect, and good robustness Effect

Active Publication Date: 2020-11-03
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, metamaterial electromagnetic absorbers usually face defects such as limited bandwidth or complex design and manufacturing processes, and the absorption frequency bandwidth is insufficient and the absorption performance is poor, which is not conducive to practical applications.

Method used

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  • Terahertz electromagnetic absorber based on metamaterial
  • Terahertz electromagnetic absorber based on metamaterial
  • Terahertz electromagnetic absorber based on metamaterial

Examples

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Embodiment

[0025] Embodiment: Terahertz electromagnetic absorbers based on metamaterials, such as Figure 1-2 As shown, it includes a dielectric layer 1 with a square cross section in the horizontal direction, the material of the dielectric layer 1 is glass material, the dielectric constant of the dielectric layer 1 is 4.41; the loss tangent angle of the dielectric layer 1 is 0.0004; the dielectric layer 1 has a length of 500 μm and a thickness of 80 μm; the bottom surface of the dielectric layer 1 is provided with an absorption bottom layer 2; the absorption bottom layer 2 has a length of 500 μm and a thickness of 0.2 μm, and is made of indium tin oxide; the dielectric layer 1 The surface is provided with a patch layer 3 made of indium tin oxide; indium tin oxide is ITO (Indium Tin Oxide), which is a material for n-type semiconductor coating processing. 780nm) as a transparent material, its light transmittance is as high as 90% in the visible light frequency band, it strongly reflects i...

Embodiment 2

[0036] Embodiment 2: on the basis of embodiment 1, as Figure 12 and Figure 13 As shown, the applicant is provided with a frame-shaped patch groove 7, an annular patch groove 8 and a square patch groove 9 on the dielectric layer 1; The surface of the dielectric layer is provided with a graphene layer 9, and the middle part of the four edges of the graphene layer 9 is respectively provided with a wave-shaped topological boundary 10; Resonant boundary 11; The four corners of the graphene layer 9 are respectively provided with a transmission hole lattice 12, and the transmission hole lattice 12 at each corner is in a regular triangular matrix shape; between the four described transmission hole lattices 12 An array grid 13 is formed. In the present invention, a frame-shaped patch groove, an annular patch groove and a square patch groove are arranged on the dielectric layer, and then a graphene layer is laid on the medium layer between the frame-shaped patch groove and the annul...

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Abstract

The invention discloses a terahertz electromagnetic absorber based on metamaterial, and the terahertz electromagnetic absorber comprises a dielectric layer with a square section in the horizontal direction, and an absorption bottom layer is arranged on the bottom surface of the dielectric layer; a patch layer made of indium tin oxide is arranged on the surface of the dielectric layer; the patch layer comprises a square patch arranged in the center of the surface of the dielectric layer, an annular patch concentric with the square patch is arranged on the outer side of the square patch, and a square frame-shaped patch concentric with the annular patch is arranged on the outer side of the annular patch. The terahertz wave absorber has excellent absorption performance on terahertz waves and has the characteristic of wide absorption frequency band.

Description

technical field [0001] The invention relates to the technical field of microwave absorbers, in particular to a terahertz electromagnetic absorber based on metamaterials. Background technique [0002] Terahertz (THz) waves are electromagnetic waves located between microwaves and far-infrared rays, and are a type of broadband light. In recent years, with the development of ultrafast laser technology, the generation of terahertz pulses has a stable and reliable excitation light source, which has enabled people to study terahertz. The advantages of terahertz waves are extremely significant in today's rapid social development, so it has attracted extensive research attention. The terahertz electromagnetic absorber based on metamaterials is the metamaterial electromagnetic absorber, which is a type of component that can effectively absorb electromagnetic waves and make it used in subsequent processes. By designing the surface array unit structure of the metamaterial electromagnet...

Claims

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Application Information

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IPC IPC(8): H01Q17/00G02B5/00
CPCH01Q17/008G02B5/003
Inventor 徐弼军周婕
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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