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A frequency-tunable terahertz multi-band absorber

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

Active Publication Date: 2020-12-22
XIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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-tunable terahertz multi-band absorber, which comprises an absorber body fixed on a rotatable platform. Several absorbing units are arranged on the absorbing surface of the absorber body, and each absorbing unit includes a The three-layer structure of metal pattern layer, lossy dielectric layer and bottom total reflection layer closely attached from top to bottom. The metal pattern layer includes four pairs of H-shaped metal pattern symmetrical structures centered on the surface of the absorbing unit. Each pair of H-shaped metal patterns is symmetrical The structures all include two H-shaped metal structures, and four pairs of H-shaped metal pattern symmetrical structures are uniformly arranged in a clockwise direction. Generate responses to problems that limit practical application capabilities.

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 Patents(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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