Glass photonic crystal selective wave absorber based on DBS algorithm

A photonic crystal and selective technology, applied in optics, instruments, mirrors, etc., can solve the problem of poor radiation cooling effect of devices, and achieve the effect of solving the problem of multi-layer loss, single material, and excellent performance

Active Publication Date: 2021-03-02
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the multi-layer problem caused by the use of multi-layer materials in the existing radiative cooling selective absorber, and the problem of poor radiation cooling effect of the device caused by optimizing the selective absorber by using an algorithm. Provide a selective absorber based on DBS algorithm, which is applied in the field of radiation cooling

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  • Glass photonic crystal selective wave absorber based on DBS algorithm
  • Glass photonic crystal selective wave absorber based on DBS algorithm
  • Glass photonic crystal selective wave absorber based on DBS algorithm

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Embodiment Construction

[0025] The present invention proposes a glass photonic crystal selective absorber based on the DBS algorithm, and its periodic three-dimensional structure schematic diagram is as follows figure 1 As shown, the schematic diagram of the three-dimensional structure of a unit in the periodic structure is shown in figure 2 As shown, it includes an optimized selective absorption region 1, an absorption layer 2, and a reflection layer 3.

[0026] The material of the optimized selective absorption region 1 is glass photonic crystal, and the thickness of the optimized selective absorption region 1 is t=3 μm; the material of the described absorption layer 2 is silicon dioxide, and the thickness of the absorption layer 2 is w=11 μm, the material of the reflective layer 3 is silver, and the thickness is h=0.5 μm.

[0027] Silver is widely used as an ideal conductor material in the infrared band, so we coat a layer of silver film on the bottom of the silicon dioxide absorbing layer, so t...

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Abstract

The invention belongs to a selective wave absorber applied to radiation cooling, and particularly relates to a glass photonic crystal selective wave absorber based on a DBS algorithm, so as to achievethe purpose of radiation cooling. The wave absorber is composed of periodic structures, and one periodic structure unit comprises an optimized selective absorption area, an absorption layer and a reflection layer. According to the selective absorber designed on the basis of the DBS algorithm, the problem of multilayer loss in the process of manufacturing the multilayer radiation cooling selectiveabsorber is solved, the problem that the effect of optimizing the radiation cooling selective absorber through the algorithm is not ideal is solved, and the selective absorber which is excellent in performance, single in material and capable of being produced in batches is achieved.

Description

technical field [0001] The invention belongs to a selective wave absorber applied to radiation cooling, in particular to a glass photonic crystal selective wave absorber based on a DBS algorithm, thereby realizing the purpose of radiation cooling. Background technique [0002] The practice of radiative cooling dates back centuries and was not really systematically studied until the 20th century. Studies have shown that in the atmosphere, for light waves of 8-13 μm, its radiation energy can be directly transmitted to 3K outer space (Kelvin temperature system). Studies have shown that using the black body radiation formula, it can be derived that high emission is equivalent to high absorption. Therefore, the use of selective absorbers to achieve high absorption (high emission) in this band is expected to provide a feasible solution to the problem of global warming. In addition, high reflectivity (up to 100%) of the device in the band below 8 μm is also necessary, which aims ...

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Application Information

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IPC IPC(8): G02B5/00G02B5/08G02B1/00
CPCG02B5/003G02B5/0808G02B1/005
Inventor 姜鑫鹏杨俊波马汉斯
Owner NAT UNIV OF DEFENSE TECH
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