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Double-layer concave structure terahertz ring dipole metamaterial

A terahertz ring-couple, double-layer concave technology, applied in the structural form of radiating elements, antennas, electrical components, etc., can solve the problems of inability to directly verify the correctness of the theory, no metamaterials are prepared, and achieve adjustable and enhanced resonant frequency. The effect of front incident intensity and high Q value

Active Publication Date: 2018-09-21
TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2007, Marinov K and others theoretically designed a metamaterial with observable magnetic dipoles for the first time. Since then, metamaterials have become the main material for the study of ring dipoles, but no metamaterials have been prepared, and the correctness of the theory cannot be directly verified. sex

Method used

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  • Double-layer concave structure terahertz ring dipole metamaterial
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  • Double-layer concave structure terahertz ring dipole metamaterial

Examples

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preparation example Construction

[0029] The preparation method of the present invention is a photolithography method and a vacuum thermal evaporation method, comprising the steps of:

[0030] (1) Preparation of the first layer of polyimide: cleaning and dehydrating the silicon wafer and forming a base film on the surface of the silicon wafer; using a glue-spinning machine to coat polyimide acid on the treated silicon wafer, and then the sample Put it in a high-temperature oven for the imidization process of the film. The specific imidization process conditions are as follows: heat the silicon wafer coated with polyimide acid from room temperature to 90-110°C and keep it for 25-35min; heat it to 190°C ~210°C, keep for 25-35min; heat to 290-310°C, keep for 25-35min; finally, heat to 330-365°C, and keep for 50-90min. After this step, the first dielectric layer can be obtained, which has a length of 168 μm-294 μm, a width of 104 μm-182 μm, and a thickness of 4 μm-8 μm.

[0031] (2) Preparation of the first layer...

Embodiment 1

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, and the present invention is not limited to the following examples.

[0036] Such as Figure 1-6 As shown, the four-layer structure of the metamaterial model takes the geometric center of each layer as the origin. The arrangement shape of each metal layer is as follows: the opening directions of two adjacent concave shapes in a row are opposite, and the upper and lower row structures are consistent; the distance between two opposite concave metal structures symmetrical to the center is g=-5 μm, and the outer length of the concave structure and width are lx=150μm and ly=77μm respectively; the length and width inside the concave structure are lx-w=132μm and ly-w=68μm respectively; the thickness is thm=0.2μm; all the concave metal structures have the same size, distance Equal; the distance between the first metal layer of the concave structure and the fir...

Embodiment 2

[0044] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, and the present invention is not limited to the following examples.

[0045] Such as Figure 1-6 As shown, the four-layer structure of the metamaterial model takes the geometric center of each layer as the origin. The arrangement shape of each metal layer is: the opening directions of two adjacent concave shapes in a row are opposite, and the upper and lower row structures are consistent; the distance between two opposite concave metal structures symmetrical to the center is g=0μm, and the outer length of the concave structure and The widths are lx=151μm and ly=79μm; the length and width inside the concave structure are lx-w=128μm and ly-w=67.5μm; the thickness is thm=0.3μm; all the concave metal structures have the same size, the distance Equal; the distance between the first metal layer of the concave structure and the first dielectric bottom layer i...

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Abstract

The invention relates to a double-layer concave structure terahertz ring dipole metamaterial. The metamaterial is obtained by the overlapping of two concave structures in the opposite directions, andtwo layers of metal layers with concave structures which are arranged symmetrically are arranged in a medium and a dielectric layer; the arrangement structure of each layer of the metal layer is thatthe opening directions of two concave structures on one row are opposite, and the structures on the upper and lower rows are the same; two reversed concave metal structures are symmetrically arrangedtaking the geometric centers of each metamaterial layer; the dimensions of all the concave metal structures are the same, and the distances are the same; the distance from a first metal layer and thebottom of a first dielectric layer is 3 microns to 10 microns; the distance between the metal layers of the two rows of the concave structures arranged on the front and back sides of a second dielectric layer is 15 microns to 30 microns. According to the metematerial, a 'medium-metal-medium-metal' structure is adopted, when excellent ring dipoles are significantly observed under a terahertz waveband, Q is greater than 7.5, and the metamaterial has significant meaning on theoretical research and experimental testing of the terahertz waveband.

Description

technical field [0001] The invention is a double-layer concave structure terahertz ring dipole metamaterial, which adopts a "medium-metal-medium-metal" structure ring dipole metamaterial, which can effectively enhance the front incident intensity, and its Q value can also reach Around 7.5, using the electromagnetic properties of ring dipoles in the terahertz frequency band, it can be used to prepare terahertz devices such as terahertz sensors, frequency modulators, and filters. Background technique [0002] Terahertz (THz) waves are electromagnetic waves that lie between microwaves and far infrared. Terahertz waves were officially named in the 1980s. With the development of new materials and technologies, a series of breakthroughs were made in terahertz emission sources and detectors in the 1990s, which set off an international wave. The upsurge of terahertz research. Terahertz has a wide range of applications in broadband communications, electronic detection, non-destruct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00H01Q1/38
CPCH01Q1/38H01Q15/00
Inventor 王爽朱剑宇王晨
Owner TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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