A broadband polarization-insensitive metamaterial in the terahertz band

A broadband polarization, terahertz technology, applied in the field of electromagnetic communication, can solve the problems of difficult forming of corners, complex structure, difficult production, etc., and achieve the effect of widening the bandwidth

Active Publication Date: 2020-07-28
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0010] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a terahertz band broadband polarization-insensitive metamaterial, solve the deficiencies of the existing terahertz band wave-absorbing materials in terms of complex structure and difficult manufacture, and at the same time utilize circular The flaky graphics avoid the disadvantages of corners that are not easy to form in the preparation of metamaterials

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  • A broadband polarization-insensitive metamaterial in the terahertz band
  • A broadband polarization-insensitive metamaterial in the terahertz band
  • A broadband polarization-insensitive metamaterial in the terahertz band

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Embodiment Construction

[0031] Further describe the technical scheme of the present invention in detail below in conjunction with accompanying drawing:

[0032] Such as figure 1 As shown, a broadband polarization-insensitive metamaterial in the terahertz band, such as figure 1 , figure 2 and image 3 As shown, it includes a metal thin film reflective layer 1 , an intermediate dielectric layer 2 and a patterned material layer 3 , and the intermediate dielectric layer 2 is located between the metal thin film reflective layer 1 and the patterned material layer 3 . The material has a periodic structure, and the size of an overall unit is 100 μm×100 μm, and the area of ​​the metal thin film reflective layer 1 is the area of ​​the entire metamaterial.

[0033] More preferably, in this embodiment, as figure 1 As shown, the thickness H1 of the metal thin film reflective layer 1 is 200 nm, and the thickness H2 of the intermediate dielectric layer 2 is 1.4 μm.

[0034] Wherein, the patterned material lay...

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Abstract

The invention discloses a terahertz band broadband polarization-insensitive metamaterial, which comprises a metal film reflecting layer, an intermediate medium layer and a graphic material layer, wherein the intermediate medium layer is located between the metal film reflecting layer and the graphic material layer; the graphic material layer is formed by arranging metal disc stack structures; eachmetal disc stack structure is sequentially stacked with a first composite disc, a first medium, a second composite disc, a second medium and a third composite disc from bottom to top; the radius of each composite disc is sequentially reduced from bottom to top, each first mediums and the corresponding second composite disc are the same in radius and each second medium and the corresponding thirdcomposite disc are the same in radius; and each composite disc responds to an absorption peak. The problems that an existing terahertz band wave-absorbing material is complicated in structure and difficult to produce are solved; and meanwhile, the disadvantage that a corner is not easy to form in metamaterial preparation is avoided by using disc-shaped graphics.

Description

technical field [0001] The invention relates to the field of electromagnetic communication, in particular to a terahertz band broadband polarization-insensitive metamaterial. Background technique [0002] Terahertz waves refer to electromagnetic waves with a frequency in the range of 0.1THz to 10THz. Terahertz is also called far-infrared, submillimeter waves, and ultra-microwaves. The development of the infrared band and the microwave band on both sides of the terahertz wave is relatively mature, and the understanding and research on the terahertz band are still very limited. [0003] The development of terahertz science requires many electromagnetic functional devices, such as THz wave sources, lenses, switches, modulators, sensors, phase shifters, and beamforming devices, etc. However, materials that can manipulate terahertz waves in nature are expensive and scarce, resulting in terahertz Development is limited. [0004] Terahertz waves have many advantages: (1) Transien...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q17/00
CPCH01Q17/00
Inventor 吴志明宋美臻
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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