Infrared electromagnetic periodic structure with selective absorption and beam anisotropic reflection functions

A periodic structure and selective technology, applied in the direction of electrical components, antennas, etc., can solve the problems of low emissivity and inability to realize the different directions of infrared detection beam deflection, so as to reduce the probability of being detected, meet the requirements of infrared radiation suppression and radiation cooling Effect

Active Publication Date: 2022-04-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Claims
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Problems solved by technology

The materials currently used in infrared camouflage are mostly low-emissivity coatings or electromagnetic metamaterials with selective absorption functions, which usually only have the control characteristics of the target's own emissivity, and cannot realize the detection of infrared detection beams (such as wavelengths of 10.6 microns) Anisotropic deflection of mid-infrared light and near-infrared light with a wavelength of 1.55 microns

Method used

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  • Infrared electromagnetic periodic structure with selective absorption and beam anisotropic reflection functions
  • Infrared electromagnetic periodic structure with selective absorption and beam anisotropic reflection functions
  • Infrared electromagnetic periodic structure with selective absorption and beam anisotropic reflection functions

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Embodiment

[0028] like figure 1 and figure 2 As shown, the infrared electromagnetic periodic structure with both selective absorption and beam anisotropic reflection functions provided by the embodiment includes Al metal reflective layer 1 (length = 192 μm, width = 192 μm, thickness h = 0.25 μm), MgF 2 Dielectric filling layer 2 (length = 192 μm, width = 192 μm, thickness h = 1.5 μm), and a multifunctional structural unit arranged in a 6×6 array on the filling layer; the multifunctional structural unit consists of 10 1× 10 arranged units ( figure 2 b) Composition, the phase compensation values ​​of 10 units from left to right are π, 2π, the unit includes PbTe layer, MgF 2 layer (length = 1.5 μm, width = 1.7 μm, thickness h_MgF 2 =0.3 μm), Al layer (long=1.4 μm, wide=1.4 μm, thickness h_Al=0.05 μm), ZnS layer (long=1.4 μm, width=1.4 μm, thickness h_ZnS=0.09 μm), Al layer (long= 1.4μm, width=1.4μm, thickness h_Al=0.05μm), HfO 2 layer (length = 1.4 μm, width = 1.4 μm, thickness h...

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Abstract

An infrared electromagnetic periodic structure with selective absorption and wave beam anisotropic reflection functions comprises a substrate and multifunctional structure units which are arranged on the substrate in an array mode. The multifunctional structure unit is composed of units arranged in a 1 * L mode. Each unit comprises a high-dielectric low-loss phase compensation layer, a low-dielectric low-loss electromagnetic isolation layer and a broadband selective electromagnetic wave absorbing structure. The broadband selective electromagnetic wave absorbing structure comprises a first metal electromagnetic wave reflecting layer, a ZnS layer, a second metal electromagnetic wave reflecting layer, an HfO2 layer, a third metal electromagnetic wave reflecting layer, a Y2O3 layer and a fourth metal electromagnetic wave reflecting layer. Different-direction deflection of a detection light beam is achieved through the high-dielectric low-loss phase compensation layer, meanwhile, the square broadband selective electromagnetic wave absorbing structure is adopted, the characteristics of broadband high emissivity of the wave band of 5-8 microns and low emissivity of the wave band of 8-14 microns are achieved, and the probability that a target body is detected is effectively reduced.

Description

technical field [0001] The invention belongs to the field of infrared electromagnetic beam control metamaterials and electromagnetic wave absorbing materials, and in particular relates to an infrared electromagnetic periodic structure with the functions of selective absorption and beam anisotropic reflection. Background technique [0002] Infrared radiation spectrum control technology has important application value in many fields, especially in infrared imaging, molecular biosensing, information communication, military infrared camouflage and other aspects of strategic significance. Compared with traditional infrared radiation control materials, infrared electromagnetic metamaterials based on micro-nano structures are more flexible in design, and the functions realized, such as infrared broadband electromagnetic absorption, electromagnetic beam anisotropic scattering direction control, etc., are increasingly diversified and integrated. change. The materials currently used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00
CPCH01Q15/0086Y02D30/70
Inventor 周佩珩刘彦宁王茂人李文新张丽邓龙江
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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