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A Metasurface for Infrared Multiband Coherent Light Absorption

A coherent light and multi-band technology, applied in optics, optical components, instruments, etc., can solve the problems of limited coherent light, singleness, etc., and achieve the effect of easy connection and coupling, simple design, and extremely thin thickness

Inactive Publication Date: 2019-04-23
欧阳征标
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Just like a laser, the wavelength band of perfect absorption of coherent light is usually very narrow, and can only work in a single wavelength range. It is difficult to extend the existing technology to wide-band or multi-band, which greatly limits the application of perfect absorption of coherent light.

Method used

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  • A Metasurface for Infrared Multiband Coherent Light Absorption
  • A Metasurface for Infrared Multiband Coherent Light Absorption
  • A Metasurface for Infrared Multiband Coherent Light Absorption

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Embodiment 1. The dielectric plate is zinc sulfide, the metal coating is silver, the background medium is air, the thickness of the dielectric plate is d=0.3 μm, and the thickness m of the metal layer is 60 nm. The thickness of the four metal sheets are l 1 = 2.2 μm, l 2 = 2.3 μm, l 3 = 2.4 μm, l 4 = 2.5 μm, , the absorption rates at wavelengths of 10.92 μm, 11.38 μm, 11.88 μm and 12.41 μm are 95.4%, 97.2%, 100% and 100%, respectively. When , the absorption rate of the four bands is 0.

Embodiment 2

[0038]Embodiment 2. The dielectric plate is zinc sulfide, the metal coating is silver, the background medium is air, the thickness of the dielectric plate is d=0.3 μm, and the thickness m of the metal layer is 60 nm. The thickness of the four metal sheets are l 1 = 2.2 μm, l 2 = 2.3 μm, l 3 = 2.4 μm, l 4 = 2.55 μm, , the absorption rates at wavelengths of 10.92 μm, 11.38 μm, 11.88 μm and 12.57 μm are 95.4%, 97.2%, 100% and 100%, respectively. When , the absorption rate of the four bands is 0.

Embodiment 3

[0039] Embodiment 3. The dielectric plate is zinc sulfide, the metal coating is silver, the background medium is air, the thickness of the dielectric plate is d=0.3 μm, and the thickness m of the metal layer is 60 nm. The thickness of the four metal sheets are l 1 = 2.2 μm, l 2 = 2.3 μm, l 3 = 2.4 μm, l 4 = 2.6 μm, , the absorption rates at wavelengths of 10.92 μm, 11.38 μm, 11.88 μm and 12.88 μm are 95.4%, 97.2%, 100% and 100%, respectively. When , the absorption rate of the four bands is 0.

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Abstract

Disclosed is a hypersurface for absorbing infrared multi-band coherent light, comprising a homogeneous dielectric plate, wherein upper and lower layers of the dielectric plate are both provided with a metal plating having the same pattern, and the pattern of the metal plating is composed of cells arranged periodically; the cell is provided with four square metal sheets; and the hypersurface is arranged in a homogeneous background dielectric. The hypersurface has a compact structure, has an extremely thin thickness, is simply designed, is convenient for processing and manufacturing, reduces production costs, and can be widely applied to a novel multi-frequency switch, a modulator and other integrated optoelectronic devices.

Description

technical field [0001] The invention relates to an artificial micro-nano structure and coherent light absorption, in particular to a metasurface for infrared multi-band coherent light absorption. Background technique [0002] In recent years, artificial microstructure materials, including photonic crystals, metamaterials, etc., have attracted extensive attention due to their unique electromagnetic properties that are difficult to obtain in nature. Metamaterials are materials with artificial structures, which have electromagnetic properties that are difficult to obtain in nature, such as negative refractive index, inverse Cerenkov radiation, artificial magnetic response, artificial electrical response, etc., and their unique electromagnetic properties are derived from their The unique cell structure is obtained not only by the material from which it is constructed. Metamaterials have anisotropic properties in a range much smaller than the working wavelength, but have isotrop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B1/00
CPCG02B1/00
Inventor 欧阳征标肖栋
Owner 欧阳征标
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