Transparent broadband metamaterial absorber

Abstract

The invention discloses a transparent broadband metamaterial absorber which comprises multiple periodically arranged unit structures. Each of the unit structures comprises an upper layer transparent resonant structure at the center of the unit structure, a middle layer transparent substrate, and a lower layer transparent reflection layer. The upper layer transparent resonant structure is above the middle transparent substrate, and the lower layer transparent reflection layer is under the middle layer transparent substrate. The upper layer transparent resonant structure is a symmetric figure which comprises a ring and a ring with a branch at the periphery of the ring. Both the upper layer transparent resonant structure and the lower layer transparent reflection layer are transparent conductive materials. According to the transparent broadband metamaterial absorber, the reflection rate of incident electromagnetic wave can be effectively attenuated in an X band, the transparent broadband metamaterial absorber is convenient to manufacture, the technology is mature, the light transmittance performance of the overall structure is excellent and a light transmittance rate is larger than or equal to 80% in a visible light range, and the transparent broadband metamaterial absorber has a good prospect in application.

Description

technical field [0001] This patent relates to radar stealth and new artificial electromagnetic materials, in particular to a transparent broadband material absorber. Background technique [0002] Most of the traditional multi-resonant structures use multi-layer stacking technology to achieve bandwidth expansion, which is expensive for transparent absorbers, difficult to manufacture, and will seriously deteriorate the light transmission performance. [0003] The new artificial electromagnetic materials (Metamaterials) involved in the present invention are composed of periodic arrangement of sub-wavelength unit structures of a certain scale. By manually designing the unit structure, the equivalent dielectric constant, magnetic permeability, refractive index and wave impedance of the material can be controlled. And other electromagnetic parameters, realize the properties that the materials that exist in nature do not have. With the deepening of theoretical research and applica...

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Problems solved by technology

[0002] Most of the traditional multi-resonant structures use multi-layer stacking technology to achieve bandwidth expansion, which is expensive for transparent absorbers, difficult to manufacture, and seriously degraded in light transmission performance.

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