A broadband absorbing metamaterial in the terahertz band

A terahertz and metamaterial technology, applied in the field of terahertz band broadband absorbing metamaterials, can solve problems such as limited absorption bandwidth and difficult processing, and achieve the effects of facilitating mass production, low manufacturing precision requirements, and increasing average absorption rate

Inactive Publication Date: 2016-01-20
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a terahertz band broadband absorbing metamaterial, the purpose of which is to realize the terahertz band broadband absorbing function with a single layer of small periodic size metamaterial, thereby solving the current problem The problem of limited absorption bandwidth and difficult processing of metamaterials in the terahertz band

Method used

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  • A broadband absorbing metamaterial in the terahertz band
  • A broadband absorbing metamaterial in the terahertz band
  • A broadband absorbing metamaterial in the terahertz band

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Embodiment 1

[0029] The terahertz band broadband absorbing metamaterial includes a metal reflective layer, a dielectric layer and a metal pattern layer. The metal reflection layer is a continuous metal aluminum film, the thickness of the reflection layer is H3=1μm, and the conductivity of metal aluminum is σ=3.56×10 7 S / m; the dielectric layer is polyimide, the thickness H2=9μm, the dielectric constant ε=3.5, the magnetic permeability is μ=1; the metal pattern layer is 8 concentric square metal rings, the concentric metal rings Metal section width W=0.4μm, height H1=0.05μm, distance between each metal ring is D=0.3μm, outermost square metal ring side length L1=19.6μm, innermost square ring side length L2=8μm, two-dimensional Periodic array metamaterial period is P=30μm. The preferred scheme of the metal pattern layer is as figure 2 shown.

[0030] The above terahertz band broadband absorbing metamaterial has been simulated by CST, and its absorption spectrum is as follows: image 3 sh...

Embodiment 2

[0032] The terahertz band broadband absorbing metamaterial includes a metal reflective layer, a dielectric layer and a metal pattern layer. The metal reflection layer is a continuous metal aluminum film, the thickness of the reflection layer is H3=1μm, and the conductivity of metal aluminum is σ=3.56×10 7 S / m; the dielectric layer is polyimide, the thickness of the dielectric layer is H2=6μm, the dielectric constant ε=3.5, and the magnetic permeability is μ=1; the metal pattern layer is 8 concentric square metal rings, and the concentric metal The metal section width of the ring is W=0.2 μm, the height H1=0.04 μm, the distance between each metal ring is D=0.1 μm, the side length of the outermost square metal ring is L1=19.6 μm, and the side length of the innermost square ring is L2=14 μm. The period of the two-dimensional periodic array metamaterial is P=30μm. The preferred scheme of the metal pattern layer is as figure 2 shown.

[0033] The above terahertz band broadband ...

Embodiment 3

[0035]The terahertz band broadband absorbing metamaterial for broadband absorption includes a metal reflective layer, a dielectric layer and a metal pattern layer. The metal reflection layer is a continuous metal aluminum film, the thickness of the reflection layer is H3=1μm, and the conductivity of metal aluminum is σ=3.56×10 7 S / m; the dielectric layer is polyimide, the thickness of the dielectric layer is H2=10μm, the real permittivity ε=3.5, and the magnetic permeability is μ=1; the metal pattern layer is 8 concentric square metal rings, and the concentric The metal section width of the metal ring is W=0.6μm, the height H1=0.6μm, the distance between each metal ring is D=0.4μm, the side length of the outermost square metal ring is L1=19.6μm, and the side length of the innermost square ring is L2=3.3 μm, the period of the two-dimensional periodic array metamaterial is P=30μm. The preferred scheme of the metal pattern layer is as figure 2 shown.

[0036] The above terahe...

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Abstract

The invention discloses a terahertz waveband broadband absorbing metamaterial and belongs to the field of electromagnetic communication. The terahertz waveband broadband absorbing metamaterial comprises a metal reflection layer, a medium layer and a metal pattern layer, wherein the medium layer is arranged between the metal reflection layer and the metal pattern layer, the metal reflection layer is a continuous metal film and in the thickness larger than skin depth of Terahertz waves, the metal pattern layer is composed of periodically arranged unit devices which are a plurality of concentric metal rings, and absorbing bandwidth portions of the adjacent single rings are overlapped to form Terahertz waveband broadband absorption. Duty ratio and average absorption rate of a periodic structure of the metalmaterial are increased greatly, bandwidth control of Terahertz waveband absorption is realized by increasing and decreasing the number of the concentric metal rings, absorption bandwidth is flexible and convenient to adjust, the pattern structure is simple, multilayer overlapping is omitted, period is short, requirements on manufacturing accuracy is low, and batch production is facilitated.

Description

technical field [0001] The invention belongs to the field of electromagnetic communication, and more specifically relates to a terahertz band broadband absorbing metamaterial. Background technique [0002] Terahertz wave (THz, 1THz=10 12 Hz) refers to electromagnetic waves with a frequency in the range of 0.1THz to 10THz. This frequency band is between macroelectronics and microphotonics. It coincides with infrared waves at high frequencies and coincides with millimeter waves at low frequencies. Because this wavelength range is neither suitable for completely using optical theory, nor suitable for completely using microwave technology research, and there has been a lack of effective methods for generating and detecting THz waves for a long time, it is called the "THz gap" of electromagnetic waves. )". However, terahertz spectroscopy contains very rich physical and chemical information, so it has very important potential application value in the detection of material struct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q17/00
Inventor 陈长虹冯士高孟德佳
Owner HUAZHONG UNIV OF SCI & TECH
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