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Metamaterial terahertz electromagnetic absorber

An electromagnetic absorber, terahertz technology, applied in the direction of instruments, electrical components, optics, etc., can solve the problems of polarization sensitivity, insufficient wide angle, complex design and manufacturing process, poor sound absorption performance, etc., and achieve good wide angle characteristics , good polarization insensitivity, wide bandwidth effect

Inactive Publication Date: 2020-04-21
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Usually, they are faced with defects such as limited bandwidth or complicated design and manufacturing process, and the polarization sensitive characteristics, insufficient wide angle, and poor sound absorption performance are not conducive to practical applications.

Method used

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  • Metamaterial terahertz electromagnetic absorber
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  • Metamaterial terahertz electromagnetic absorber

Examples

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Embodiment

[0025] Example: Metamaterial terahertz electromagnetic absorbers, 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 polyimide, which has excellent electromagnetic absorption performance and is a lossy material. The dielectric constant of the dielectric layer is 3.5+0.2i; the length and width of the dielectric layer 1 are both 12 μm and the thickness is 1.4 μm, and a layer of foam layer 6 is connected to the bottom surface of the dielectric layer 1. The rigid foam used has a dielectric constant of 1.07, and the dielectric constant is 1.07. The length and width of the foam layer 6 are both 12 μm and the thickness is 12 μm; the bottom surface of the foam layer 6 is provided with a metal grounding layer 2, the length and width of the metal grounding layer 2 are both 12 μm, and the thickness is 100 nm, and the material is gold; The surface of the dielectric layer 1 is pro...

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Abstract

The invention discloses a metamaterial terahertz electromagnetic absorber. The metamaterial terahertz electromagnetic absorber is characterized by comprising a dielectric layer with a square section in a horizontal direction, a foam layer connected to the bottom surface of the dielectric layer, and a metal grounding layer arranged on the bottom surface of the foam layer; a metal patch layer is arranged on the surface of the dielectric layer; the metal patch layer comprises a regular-cross-shaped patch arranged in the center of the surface of the dielectric layer; square patches are arranged atthe four corners of the regular-cross-shaped patch respectively; a first patch frame and a second patch frame are arranged at the peripheries of the regular-cross-shaped patch and the square patches;and the first patch frame and the second patch frame are two parts which are reserved after two adjacent sides of a square frame are cut by two cuboids respectively. The terahertz wave absorber has excellent terahertz wave absorption capacity, polarization insensitivity and wide-angle characteristic.

Description

technical field [0001] The invention relates to the technical field of microwave absorbers, in particular to a metamaterial terahertz electromagnetic absorber. Background technique [0002] Broadband light absorption based on micro-nanostructures has been extensively studied in recent years due to its wide applications in solar energy harvesting, thermal radiation control, and thermal imaging. 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 has a wide range of applications in biomedicine, safety monitoring, non-destructive detection, spectroscopy and imaging technology, and military radar. The development and utilization of terahertz bands are inseparable from terahertz functional de...

Claims

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Application Information

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IPC IPC(8): H01Q17/00G02B5/00
CPCG02B5/003H01Q17/008
Inventor 徐弼军闫梦瑶
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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