Perfect absorber

A perfect absorption, cylindrical technology, applied in optical components, optics, instruments, etc., can solve problems such as poor absorption effect

Active Publication Date: 2017-08-29
THE CHINESE UNIV OF HONG KONG SHENZHEN
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] Aiming at the existing problems of polarization sensitivity defects in perfect absorbers and poor absorption effec

Method used

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Embodiment Construction

[0013] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0014] Such as figure 1 , 2 , 3, the embodiment of the present invention provides a perfect absorbent body. The perfect absorber includes a substrate layer 1 with two opposite surfaces, a metal layer 2 and a dielectric layer 3 stacked in sequence from one surface of the substrate layer 1 outward, and a metal layer stacked on the surface of the dielectric layer 3 Metal Nanoarray 4;

[0015] Wherein, the metal nanoarray 4 is any one of a cylinder array, a 3D spiral array, a prism array, and a regular prism array.

[0016] In any embodiment, the substrate 1 is any one of quartz, silicon wa...

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Abstract

A perfect absorber comprising a base layer having two opposing surfaces and a metal layer, a dielectric layer, and a dielectric layer stacked in this order from the surface of the substrate layer, further comprising a metal nanometer array stacked on the surface of the dielectric layer. The metal nanometer array is any one of a cylindrical array, a 3D helical array, a prism array, and an array of positive prisms. This kind of perfect absorber has no polarization sensitive defects, achieves broad spectrum absorption of spectral solar energy, and achieves absorption of 0.5-1.8 micron spectrum of 90% and above, which greatly improves the utilization rate of solar energy.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic wave absorbing structures, in particular to a perfect absorber. Background technique [0002] An electromagnetic wave absorbing structure based on artificial synthetic materials, its electromagnetic wave parameters and the electromagnetic parameters of the surrounding environment can achieve impedance matching, and the absorption rate in a specific wave band is 100%, so people call this electromagnetic wave absorbing structure a perfect absorber. [0003] When the existing perfect absorber is used in the front end of a solar cell, it can convert spectral solar energy into heat energy, and the converted heat energy can be conducted to the emitter at the back end and radiated out of a narrow-band radiation spectrum that matches the band gap of the battery, so that the solar energy can be maximized. limited use. Due to the restriction of the Shockley-Queser limit, the existing single-cell so...

Claims

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Application Information

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IPC IPC(8): G02B5/00
CPCG02B5/003
Inventor 张昭宇韩谞何克波
Owner THE CHINESE UNIV OF HONG KONG SHENZHEN
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