A kind of mid-long wave infrared broad-spectrum light-absorbing material and its preparation method

A light-absorbing material, long-wave infrared technology, applied in nanotechnology, optics, optical components and other directions for materials and surface science, can solve the problem that the absorption wavelength is difficult to adjust to the mid- and far-infrared band, the light-absorbing material cannot withstand high temperature, It is difficult to achieve ultra-broadband light absorption and other issues to achieve the effects of abundant reserves, mature processing technology and low material cost

Active Publication Date: 2021-11-05
WUHAN UNIV
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Problems solved by technology

The problem with the first idea is that the superposition of multi-band resonance modes is difficult to achieve ultra-wide-band light absorption. Due to the limitation of the plasmon resonance wavelength, it is difficult to adjust the absorption wavelength to the mid-to-far infrared band, and light-absorbing materials containing metal nanostructures Can not withstand high temperature, high power light irradiation and other conditions

Method used

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  • A kind of mid-long wave infrared broad-spectrum light-absorbing material and its preparation method
  • A kind of mid-long wave infrared broad-spectrum light-absorbing material and its preparation method
  • A kind of mid-long wave infrared broad-spectrum light-absorbing material and its preparation method

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Embodiment Construction

[0034] For a better understanding of the present invention, the following examples are further descriptions of the present invention, but the content of the present invention is not limited to the following examples.

[0035] A method for preparing a medium-long-wave infrared broad-spectrum light-absorbing material, comprising the following steps:

[0036] (1) According to the target absorption spectrum range, the central wavelength is 10 microns, and the dielectric constant Drude model of silicon is used to calculate the bulk plasmon wavelength is not less than 10 microns, the preferred doping concentration is not less than 1.3× 10 18 / cm 3 The heavily doped silicon wafer, by calculating the absorptivity of the selected doping concentration silicon substrate as a function of the absorption depth and wavelength, confirmed that in the 8μm-14μm band, the average absorptivity can be close to 70% at the 9μm absorption depth, and the average The reflectivity is 30%.

[0037] (2)...

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Abstract

The invention belongs to the field of preparation of inorganic functional materials, and particularly relates to a medium-long-wave infrared wide-spectrum light-absorbing material and a preparation method thereof. The silicon substrates are stacked sequentially, and the silicon nanoporous structure is distributed in the silicon hole structure and the silicon substrate. The medium and long-wave infrared wide-spectrum light-absorbing material of the present invention is composed of four layers of materials stacked in sequence to form a material with a gradient gradient of refractive index. The COSCO High-temperature resistant broad-spectrum light absorption in the infrared band. The medium and long-wave infrared wide-spectrum light-absorbing material of the invention has a large absorption wavelength range and high absorption efficiency, a thin absorption layer, no polarization dependence, a large incident angle range, and high temperature resistance.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic functional materials, and in particular relates to a medium-long-wave infrared wide-spectrum light-absorbing material and a preparation method thereof. Background technique [0002] Broad-spectrum light-absorbing materials in the medium and long-wave infrared bands can be used in infrared analog light sources, infrared stealth, infrared photothermal detection, infrared enhanced spectroscopy, waste heat utilization, etc., so they have been valued by research. Among them, broad spectrum, non-polarization dependence, and large incident angle are important performance indicators. In addition, broad-spectrum absorbing materials with high temperature resistance are of great value in aerospace and broad-spectrum infrared thermal light sources. [0003] The structure design of broad-spectrum absorbing materials follows two lines of thought. The first is to enhance the absorption characteristics of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B1/00G02B5/00B82Y30/00
CPCG02B1/00G02B5/003G02B5/008B82Y30/00
Inventor 阮翔宇管志强徐红星
Owner WUHAN UNIV
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