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Intermediate infrared 10.6-micrometer narrow bandwidth angle wave-absorbing material

A wave-absorbing material and dimensional photonic crystal technology, applied in electrical components, antennas, etc., can solve problems such as poor angle characteristics of wave-absorbing materials and serious polarization dependence

Inactive Publication Date: 2013-07-10
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to propose a metamaterial absorbing material with a narrow bandwidth angle and polarization independent in view of the poor angle characteristics and serious polarization dependence of existing wave absorbing materials

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  • Intermediate infrared 10.6-micrometer narrow bandwidth angle wave-absorbing material
  • Intermediate infrared 10.6-micrometer narrow bandwidth angle wave-absorbing material
  • Intermediate infrared 10.6-micrometer narrow bandwidth angle wave-absorbing material

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Embodiment Construction

[0020] Please refer to figure 1 , figure 1 It is a schematic diagram of the overall structure and unit structure of the metamaterial absorbing material of the present invention. Such as figure 1 As shown, the present invention includes a three-layer structure, the first layer of which is a periodic array of cross-shaped metal tungsten patches, the second layer is a dielectric layer, and the third layer is a metal reflection layer.

[0021] The materials adopted in the present invention are respectively: the first layer adopts metal tungsten, and its electromagnetic properties refer to Edward D.Palik's "Handbook of Optical Constants of Solids"; the second layer is a layer of polymer, and its relative dielectric constant is 2.88 +0.09i, loss tangent tanδ=0.0313, the third layer is a metal reflective layer, and its optional materials include gold, silver, copper and other infrared high reflective metal materials.

[0022] In order to realize high absorption at infrared 10.6 μm...

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Abstract

The invention provides an intermediate infrared 10.6-micrometer narrow bandwidth angle wave-absorbing material, and discloses a metamaterial wave-absorbing material based on a plane two dimensional photonic crystal structure. The wave-absorbing material comprises three layers, wherein the first layer is a cross-shaped metal tungsten patch periodic array, the second layer is a medium layer, and the third layer is a metal reflection layer. By means of optimization of structural parameters, the wave-absorbing material has relatively ideal absorbing effects around 10.6 micrometers, the absorption rate of the wave-absorbing material can achieve more than 98% for TE waves with incident angles ranging from 0 degree to 40 degrees, and the absorption rate of the wave-absorbing material can achieve more than 98% for TM waves with incident angles ranging from 0 degree to 80 degrees.

Description

technical field [0001] The invention relates to a two-dimensional planar photonic crystal, and more specifically relates to a metamaterial wave-absorbing material that can realize absorption properties such as narrow bandwidth angle and polarization-independent absorption at 10.6 μm. Background technique [0002] With the development of science and technology, due to the increasing number of electromagnetic equipment, the impact of electromagnetic radiation on the environment is also increasing. In order to control electromagnetic pollution, the research of wave-absorbing materials has become a major scientific topic. Absorbing materials are a class of materials that can absorb electromagnetic wave energy radiated to its surface, and have a wide range of applications in real life. For example, it can be used in medical diagnosis and biosensing by judging the absorption characteristics of typical pathogens around 10 μm; in addition, infrared absorption characteristics can als...

Claims

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Application Information

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IPC IPC(8): H01Q17/00
Inventor 纪越峰田慧平吴南南张艳红
Owner BEIJING UNIV OF POSTS & TELECOMM
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