Electromagnetic absorption metamaterial

A metamaterial and electromagnetic technology, applied in electrical components, optics, instruments, etc., can solve the problems of limited modulation ability of silicon thin film and inability of silicon thin film to achieve the effect, and achieve the effect of simple production

Active Publication Date: 2017-12-08
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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Problems solved by technology

However, due to the limited modulation capability of the silicon thin film used in this method, the silicon thin film may not achieve the desired effect under different working environments

Method used

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Embodiment Construction

[0037] Below in conjunction with the drawings, preferred embodiments of the present invention are given and described in detail.

[0038] Such as figure 1 and figure 2 Shown is an electromagnetic absorption metamaterial according to an embodiment of the present invention, the metamaterial is a non-light-transmitting metamaterial 2 disposed on a substrate 1, and the metamaterial 2 is composed of a metal-dielectric-metal three-layer material The fabrication specifically includes a continuous metal thin film 21 , a continuous intermediate isolation dielectric layer 22 and a periodic resonant unit array 23 stacked sequentially from bottom to top. The upper surface of the metamaterial 2 is in the working environment, and a layer of dielectric composite film 3 is attached to the upper surface, which is used to modulate the surface lattice resonance (SLR) of the metamaterial.

[0039] Wherein, the resonant unit is a metal resonant unit based on localized surface plasmon resonance ...

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Abstract

The invention provides an electromagnetic absorption metamaterial which has an upper surface that is in a working environment and includes a periodic resonance unit array. The upper surface of the electromagnetic absorption metamaterial is provided with a dielectric media composite film which is obtained by laminating solid dielectric media in different thickness proportions. The dielectric media composite film is made from at least two of the silicon oxide, silicon nitride, aluminium oxide, magnesium fluoride or silicon. According to the invention, since the electromagnetic absorption metamaterial is obtained by laminating media of different kinds in proportions, the dielectric film which has the refractive index between the maximum refractive index and the minimum refractive index of the selected media can be obtained, such that the surface lattice resonance can be modulated in a more flexible and controllable manner; since the dielectric media composite film is obtained by laminating solid dielectric layers in different thickness proportions, the dielectric media composite film can work in any working environment, even solid or moving environments.

Description

technical field [0001] The invention relates to the technical field of electromagnetic absorption metamaterials, in particular to metamaterials based on metal localized surface plasmon resonance and resonant units arranged in an array. Background technique [0002] The absorption characteristics of the electromagnetic absorption metamaterial here are generally composed of resonant units arranged in an array. In the visible light to mid-infrared band, the resonant unit can be composed of metal particles. This resonant unit mainly utilizes the localized surface plasmons of metal particles. Resonance (Localized Surface Plasmon Resonance, LSPR), also known as dipole resonance, the resonance frequency can be conveniently controlled by the size of metal particles. The position of the LSPR peak is: [0003] [0004] where D* is the effective particle size, n d is the refractive index of the working environment, ω p is the metal plasma frequency. [0005] However, in these EM...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00G02B5/00
CPCG02B5/003H01Q15/0086
Inventor 李铁余爱生李伟王跃林
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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