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A kind of absorber of double split ring structure graphene

A technology of graphene and absorber, which is applied in the field of double-split ring structure graphene absorber, can solve the problems of limited bandwidth, insufficient absorption frequency band bandwidth, unfavorable application, etc., and achieve the effect of excellent robustness and superior absorption performance

Active Publication Date: 2022-04-19
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A kind of absorber of double split ring structure graphene
  • A kind of absorber of double split ring structure graphene
  • A kind of absorber of double split ring structure graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: A double crack ring structure graphene absorber, such as Figure 1-2 Shown, comprising a section of the square layer 1, a gold layer 2 and a silica layer 3 in descending cascading sequentially; the gold layer is an electroplated gold layer; the surface of the silica layer 3 is provided with a square crack ring of graphene 4, the middle of the square crack ring 4 is provided with two symmetrical first cracks 5; the surface of the silicon dioxide layer 3 is provided with a circular crack ring of material graphene 6, the circular crack ring 6 is provided with two symmetrical second cracks 7; the first crack 5 and the second crack 7 are perpendicular to each other. The thickness of the silica layer 3 is 4200nm, the length is 2450nm, the thickness of the gold layer 2 is 450nm, the length is 2450nm, the thickness of the silicon layer 3 is 2000nm, the length is 2450nm, the outer length of the square crack ring 4 is 1800nm, the inner length is 1600nm, the thickness is 1nm...

Embodiment 2

[0023] Example 2: On the basis of Example 1, the edges of the gold layer 2 are provided with a wavy topological boundary 8 in the middle; the four corners of the gold layer 2 are provided with a transmission hole lattice 9, and the transmission hole lattice at each corner 9 is a positive triangular matrix; the four transmissive hole lattices 9 constitute an array grid. By using the above knots, the spin state is obtained by superimposing the two polarization states based on the non-phase and inverted phase of terahertz waves. Topological phase transitions can be produced in the structure of the gold layer, resulting in better robustness. The applicant will be the absorber in Example 2 and the absorber in Example 1 into a comparison, for testing the absorption rate of terahertz, after testing, compared to the absorption effect in Example 1, the absorption rate in Example 2 may be further improved.

[0024] In summary, the absorber of the present invention comprises a square silicon...

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Abstract

The invention discloses a graphene absorber with a double-split ring structure, which comprises a silicon layer, a gold layer and a silicon dioxide layer with a square cross-section stacked sequentially from bottom to top; the surface of the silicon dioxide layer is provided with a material of A square split ring of graphene, the middle part of the square split ring is provided with two symmetrical first cracks; the middle part of the surface of the silicon dioxide layer is provided with a circular split ring made of graphene, and the circular split ring is provided with Two symmetrical second slits; the first slit and the second slit are perpendicular to each other. The invention has very superior absorption performance for terahertz waves, and has the characteristics of absorption frequency bandwidth.

Description

Technical field [0001] The present invention relates to the field of microwave absorber technology, specifically a double split ring structure graphene absorber. Background [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. Terahertz waves have significant advantages in today's rapid social development, so they have attracted widespread research attention. Metamaterial electromagnetic absorber, is a class of components that can effectively absorb electromagnetic waves and make them used for subsequent processes, through the design of metamaterial electromagnetic absorber surface array unit structure, can achieve accurate control of electromagnetic waves. The precision micron-level structure of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q17/00G02B5/00
CPCH01Q17/008G02B5/003
Inventor 徐弼军吴震东
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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