Visible light bidirectional absorber structure

An absorber and visible light technology, which is applied in the direction of microstructure technology, microstructure devices, and manufacturing microstructure devices, etc., can solve the problem that visible light absorber junctions cannot achieve perfect absorption of bidirectional incident light at the same time, and the absorption efficiency of light absorbers is inherently limited. Solve problems such as waste of light energy, achieve the effect of bidirectional visible light absorption, simple structure, and low material consumption
CN105480931AActive Publication Date: 2016-04-13HUAIYIN INSTITUTE OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUAIYIN INSTITUTE OF TECHNOLOGY
Publication Date
2016-04-13

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Abstract

The invention discloses a visible light bidirectional absorber structure. The preparation steps of the absorber structure are as follows: (1), preparing a two-dimensional nanoarray unit on base material by using a nanofabrication technology, wherein the cycle of the nanostructure unit is 100-200 nm, the ratio of the bottom width of the nanostructure unit and the cycle is less than 0.4, the ratio of the height of the nanostructure unit and the bottom width of the unit is more than 1.5; (2), evaporating or sputtering a metal layer with thickness of 5-20 nm on the two-dimensional nanostructure unit; and (3), evaporating or sputtering a media layer with thickness of 5-20 nm on the metal layer. According to the invention, the bidirectional almost perfect absorption of the visible light is realized; the structure is simple; the consumed material is little; the angle is wide; and the structure has wide application prospect in photoelectric detector and stealth camouflage fields.
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Description

technical field

[0001] The invention relates to an electromagnetic wave absorbing structure, in particular to a visible light bidirectional absorber structure, which can be applied to the fields of thermal photovoltaic devices, photodetectors, camouflage and stealth in the visible light region, and the like. Background technique

[0002] In 2008, Landy, N.I. published a research paper in the journal "Physical review letters", proposing for the first time a perfect absorber structure with a single-wavelength absorption rate of 100%. Since then, people have been working on exploring a perfect electromagnetic absorber structure with wide band and wide angle, because this kind of broadband electromagnetic absorber has potential and huge applications in the fields of thermal photovoltaic devices, photodetectors, and stealth camouflage. potential. Especially the perfect absorber in the visible light frequency band can also be applied to thermal imaging technology, ink-free printi...

Claims

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