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Frequency-adjustable terahertz multi-band absorber

An absorber, terahertz technology, applied in the field of terahertz metamaterials, which can solve problems such as limited practical application capabilities

Active Publication Date: 2019-06-14
XIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a frequency-tunable terahertz multi-band absorber, which solves the problem that the terahertz metamaterial absorber in the prior art can only show a response to electromagnetic waves of a specific frequency, resulting in limited practical application capabilities

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] The present invention is a frequency-tunable terahertz multi-band absorber, the structure of which is as follows Figure 5 As shown, it includes the absorber body fixed on the rotatable platform, and several absorbing units are arranged on the absorbing surface of the absorber body, such as figure 1 , figure 2 As shown, each absorption unit includes a three-layer structure of a metal pattern layer 3 , a lossy dielectric layer 2 and a bottom total reflection layer 1 that are closely attached from top to bottom.

[0024] The metal pattern layer 3 includes four pairs of H-shaped metal pattern symmetrical structures centered on the surface of the absorbing unit. Each pair of H-shaped metal pattern symmetrical structures includes two H-shaped metal structures. The line width of the H-shaped metal structures is 4 μm. Four pairs The symmet...

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Abstract

The invention discloses a frequency-adjustable terahertz multi-band absorber. The frequency-adjustable terahertz multi-band absorber comprises an absorber body fixed on a rotatable platform, wherein aplurality of absorption units are distributed on the absorption surface of the absorber body; each absorption unit comprises a three-layer structure of a metal pattern layer, a loss dielectric layerand a bottom all-reflection layer which are tightly attached from top to bottom; the metal pattern layer comprises four pairs of H-shaped metal pattern symmetric structures symmetrically arranged around the center of the surfaces of the absorption units; each pair of H-shaped metal pattern symmetric structures comprises two H-shaped metal structures; and the four pairs of H-shaped metal pattern symmetric structures are sequentially and uniformly arranged in the clockwise direction. The problem that the actual application capability is limited due to the fact that a terahertz metamaterial absorber in the prior art can only show response to specific frequency electromagnetic waves is solved.

Description

technical field [0001] The invention belongs to the technical field of terahertz metamaterials, in particular to a frequency-tunable terahertz multi-band absorber. Background technique [0002] Terahertz waves refer to electromagnetic waves with a frequency between 0.1THz and 10THz. This frequency band is between far-infrared and microwave in the electromagnetic spectrum, which is in the transition stage from electronics to photonics. In nature, there is a relative lack of materials that produce good electromagnetic responses to this band, which hinders the design and implementation of light regulation, sensing, and absorption devices in the THz band, which further limits the development of THz wave technology. In addition, due to the many advantages of terahertz rays themselves: photons carry low energy and are not easy to damage the substance to be detected; they have strong penetrability, and most non-polar substances are "transparent" to the terahertz band, which can be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q17/00H01Q15/00G02B5/00
Inventor 王玥崔子健朱冬颖岳莉莎
Owner XIAN UNIV OF TECH
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