CN109830809A - A kind of multi-layer annular Terahertz Meta Materials wave absorbing device - Google Patents
A kind of multi-layer annular Terahertz Meta Materials wave absorbing device Download PDFInfo
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Abstract
The present invention discloses a kind of multi-layer annular Terahertz Meta Materials wave absorbing device, its structure includes underlying metal reflecting plate, and the multilayered structure above metal plate, it is characterized by: the multilayered structure, including the resonant element above three layers of medium substrate and every layer of medium substrate, high impedance surface is coated on resonant element.The wave absorbing device has good absorption effect for TE polarized wave and TM polarized wave, high impedance surface is coated by the resonant element on every layer of medium substrate, wave absorbing device may be implemented to absorb in the ultra wide band of terahertz wave band, the present invention coats high impedance surface by the resonant element on medium substrate, metal ohmic loss and thermal losses are avoided, make it more appropriate to work in light wave and terahertz wave band.The features such as present invention has structure popular, flexible design, functional.
Description
Technical field
The present invention relates to a kind of Terahertz Meta Materials wave absorbing device, specifically a kind of multi-layer annular Terahertz Meta Materials are inhaled
Wave device belongs to radio communication, THz devices field.
Background technique
Meta Materials are a kind of composite materials of engineer's processing, and the special physical property of the material depends on composition material
Intrinsic properties and sub-wavelength structure, and these peculiar physical properties tend not to through the intrinsic of existing nature material
Physical property obtains.Meta Materials are not a kind of new material substance, but to oneself through there are natural materials to reconfigure
Design, to peculiar physical property occur, brings conversion inwardly for traditional material mode of thinking, greatly mentions
High people's re-recognizing for material.The electromagnetism Meta Materials ambit emerging as one causes both at home and abroad in recent years
The extensive concern of many scientific research institutions.The research of the Meta Materials theoretical research from initially simple theory development by now
Lay equal stress on practical application.Patent numbers based on Meta Materials application also increase substantially, and are related to microwave device, antenna, stealthy, sensing
Multiple application fields such as device.THz wave is widely present in nature, the rotation and vibrational transition of organic molecule, semiconductor
The radiation energy of sub-belt energy, a large amount of cosmic space backgrounds in material and the characteristic spectral line of interstellar molecule are all in THz wave
Section.Although THz wave is widespread in nature, most of materials in nature are rung in the electromagnetism of Terahertz frequency range
Should be weaker, therefore lack effective Terahertz absorbing material.Traditional photon and electronic device in terahertz wave band also without
Method effectively works, and lacks effective device.The appearance of Terahertz Meta Materials is for the development of Terahertz science and technology and using band
Opportunity newly is carried out.With deepening continuously for Meta Materials research, Meta Materials research is constantly constituted to by micro/nano-scale structural unit
The Meta Materials direction such as Terahertz, infrared and visible light develop.Electromagnetism Meta Materials wave absorbing device as a kind of absorbent structure also by
Gradually designed extensively in terahertz wave band.And the electromagnetism Meta Materials wave absorbing device of general single wave band and multiple frequency ranges, only
There can be preferable assimilation effect in relatively narrow Terahertz frequency range.So in order to realize a magnetic Meta Materials wave absorbing device in Terahertz
The ultra wide band of wave band absorbs, and the present invention proposes a kind of multi-layer annular Terahertz Meta Materials wave absorbing device, can have in terahertz wave band
Ultra wide band assimilation effect.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of multi-layer annular Terahertz Meta Materials wave absorbing device, by
Resonant element surface on every layer of medium substrate coats high impedance surface, to realize that wave absorbing device is inhaled in the ultra wide band of terahertz wave band
It receives.
The present invention uses following technical scheme to solve above-mentioned technical problem:
A kind of multi-layer annular Terahertz Meta Materials wave absorbing device proposed according to the present invention, the metallic reflection including being placed in bottom
The top of plate, the metallic reflection plate has multilayered structure；The multilayered structure includes at least one layer of medium substrate, each Jie
It is equipped with resonant element above matter substrate, is coated with high impedance surface on the resonant element.
As further technical solution of the present invention, the multilayered structure includes on three layers of medium substrate and each medium substrate
The resonant element of side, first layer is identical with third layer resonant element structure, is made of two concentric loops, second layer resonance list
Member is made of the hexagon resonant element of two six side annular resonant elements and ring center, between two six side annular resonant elements
Pass through the identical trapezoidal resonant element connection of six sizes.
As further technical solution of the present invention, first layer is identical with the annulus resonant cell dimension of third layer, outer layer
Annulus resonant element outer diameter r1=13 μm, internal diameter r2=11 μm, the annulus resonant element outer diameter r of internal layer3=9 μm, internal diameter r4
=7 μm.
As further technical solution of the present invention, the second layer resonant element, outer layer is that side length isμm, it is wide
The hexagonal rings resonant element that degree is 1.2 μm, six side annular resonant element of internal layer are by side lengthHexagon clip
Radius is that 7 μm of circular patch obtains, and the hexagon resonant element side length at center isThe upper bottom of trapezoidal resonant element
It a length of 0.6 μm, goes to the bottom a length of 3 μm, a height of 5 μm.
As further technical solution of the present invention, the high impedance surface coated on every layer of resonant element is conductive carbon paste,
The sheet resistance of first layer conductive carbon paste is 500ohm/sq, and the sheet resistance of second layer conductive carbon paste is 200 ohm/sq, third layer conductive carbon
The sheet resistance of slurry is 550ohm/sq.
As further technical solution of the present invention, first layer medium substrate with a thickness of 1.5 μm, the second layer and third layer
The thickness of medium substrate is 1 μm.
As further technical solution of the present invention, the dielectric constant of the medium substrate is 3.5, and loss angle tangent is
0.0027。
As further technical solution of the present invention, the bottom reflecting plate uses metallic reflection plate, and material is gold.
The invention adopts the above technical scheme compared with prior art, has following technical effect that
(1) a kind of multi-layer annular Terahertz Meta Materials wave absorbing device of the present invention, by using multilayered structure, and in every layer of medium
High impedance surface is coated on resonant element on substrate, realizes that wave absorbing device is absorbed in the ultra wide band of terahertz wave band.
(2) a kind of multi-layer annular Terahertz Meta Materials wave absorbing device of the present invention avoids gold without increasing metal on medium
Belong to ohmic loss and thermal losses, make it more appropriate to work in light wave and terahertz wave band.
(3) a kind of multi-layer annular Terahertz Meta Materials wave absorbing device of the present invention, have the function of flexible design, have a wide range of application,
The features such as property is strong.
Detailed description of the invention
Fig. 1 is first layer of the invention and third layer structural unit figure；
Fig. 2 is second layer structural unit figure of the invention；
Fig. 3 is first layer structural unit schematic diagram of the invention；
Fig. 4 is second layer structural unit schematic diagram of the invention；
Fig. 5 is three-decker cell schematics of the invention；
Fig. 6 is side view of the invention；
Fig. 7 is cell array (3 × 3) figure of the invention；
Absorption curve when Fig. 8 is TE mode electromagnetic wave vertical incidence of the present invention；
Absorption curve when Fig. 9 is TM mode electromagnetic wave vertical incidence of the present invention；
Appended drawing reference is explained: 1- first layer resonant element, 2- second layer resonant element, 3- third layer resonant element, 4- the
One layer of medium substrate, 5- second layer medium substrate, 6- third layer medium substrate, 7- metallic reflection plate.
Specific embodiment
Technical solution of the present invention is described in further detail with reference to the accompanying drawing.
A kind of multi-layer annular Terahertz Meta Materials wave absorbing device can pass through the resonant element surface on every layer of medium substrate
Coating conductive carbon paste achievees the purpose that broaden wave absorbing device Absorber Bandwidth, ultra wide band absorption of the realization wave absorbing device in terahertz wave band.
The Terahertz Meta Materials wave absorbing device is formed by structural unit periodic arrangement.
A kind of multi-layer annular Terahertz Meta Materials wave absorbing device of the present embodiment deduction, structure is as shown in Figures 1 to 6, the bottom of by
Layer 7, the first to three layers of medium substrate 4,5,6 of reflecting plate, the first to three layer of resonance of high impedance surface is coated on each layer medium substrate
Unit 1,2,3 forms.
The high impedance surface of the coating is conductive carbon paste, can only coat certain some parts of resonant element, can also be right
Resonant element all coats, and the conductive carbon paste sheet resistance of every layer of resonant element coating is different, the conduction of first layer resonant element coating
The sheet resistance of carbon slurry is 500ohm/sq, and the sheet resistance of the conductive carbon paste of second layer resonant element coating is 200ohm/sq, and third layer is humorous
The sheet resistance of the conductive carbon paste of vibration unit coating is 550ohm/sq.
A kind of production method of multi-layer annular Terahertz Meta Materials wave absorbing device, the wave absorbing device is for incident electromagnetic wave
It is that polarization is insensitive, when electromagnetic wave vertical incidence, inhaling wave is due to being coated with high impedance surface, to there is certain conductance
Rate, and high impedance surface has certain resistance value, so that wave absorbing device Absorber Bandwidth broadens, to realize wave absorbing device in terahertz wave band
Ultra wide band absorb.
A kind of multi-layer annular Terahertz Meta Materials wave absorbing device is formed by several resonant element periodic arrangements.Structure
Unit bottom is complete metal plate, is the humorous of multilayer dielectric substrate and coating high impedance surface for being totally reflected, above metal plate
Shake unit, and three layers of medium substrate are provided on the bottom reflecting plate, and the dielectric constant of medium substrate is 3.5, and loss angle is just
It is cut to 0.0027, the upper surface of every layer of medium substrate is equipped with the resonant element of coating high impedance surface.Its building block array (3 ×
3) as shown in Figure 7.
A kind of multi-layer annular Terahertz Meta Materials wave absorbing device, bottom reflecting plate use metallic reflection plate, and material is
Gold.
A kind of multi-layer annular Terahertz Meta Materials wave absorbing device can realize good wave absorbtion in terahertz wave band
Energy.
A kind of multi-layer annular Terahertz Meta Materials wave absorbing device, first layer is identical with third layer resonant cell dimension,
It is made of two different annulus of size, the outer diameter r of the discrete annulus resonant element of outer layer1=13 μm, internal diameter r2=11 μm,
The discrete annulus resonant element outer diameter r of internal layer3=9 μm, internal diameter r4=7 μm.Second layer resonant element is by two six side annular resonances
Unit and the hexagon resonant element at ring center are constituted, and pass through the identical ladder of six sizes between two six side annular resonant elements
The connection of shape resonant element.The second layer resonant element, outer layer are that side length isThe hexagonal rings that width is 1.2 μm
Resonant element, six side annular resonant element of internal layer are by side lengthHexagon to clip radius be 7 μm of circular patch
It obtains, the hexagon resonant element side length at center isA length of 0.6 μm of the upper bottom of trapezoidal resonant element, bottom a length of 3
μm, a height of 5 μm.The relevant parameter of the wave absorbing device is as shown in table 1.
The relevant parameter of 1 resonant element of table
As shown in Figure 8 and Figure 9, absorption curve when being wave absorbing device work, the wave absorbing device are for incident electromagnetic wave
It polarizes insensitive, electromagnetic wave is incident along the direction-z when work.By absorptivity formula A (ω)=1-R (ω)-T (ω), R (ω)
Indicating reflectivity, T (ω) expression transmissivity is since bottom is complete metal reflecting plate, so T (ω)=0, therefore A (ω)=1-R
(ω).Fig. 8 is the absorption curve that the wave absorbing device obtains under TE mode, and as can be seen from Figure 8, the wave absorbing device is in frequency band
Reflectivity in 2.37THz to 16.7THz is lower than -10dB, and absorptivity is higher than 90%, and relative bandwidth 150.28% has
Two higher absorption peaks, are located at 4.33THz and 12.17THz, and absorptivity is respectively 98.2% and 98.4%.Fig. 9 is
The absorption curve that the wave absorbing device obtains under TM mode, it can be seen in figure 9 that the wave absorbing device is arrived in 2.39 THz of frequency band
Reflectivity in 16.82THz is lower than -10dB, and absorptivity is higher than 90%, and relative bandwidth 150.23%, there are two higher for tool
Absorption peak, be located at 4.36THz and 12.01THz, absorptivity is respectively 98.1% and 99.1%.
The present invention coats high impedance surface by the resonant element on medium substrate, avoids metal ohmic loss and heat waste
Consumption, make it more appropriate to work in terahertz wave band.It can realize under lesser physical size to lower frequency electromagnetic wave
It absorbs；The features such as present invention has flexible design, has a wide range of application, functional.
The above display describes the basic principles, principal features and advantages of the present invention.Those skilled in the art should
Solution, the present invention are not limited by above-mentioned specific embodiment, and the description in above-mentioned specific embodiment and specification is intended merely into one
Step illustrates the principle of the present invention, and under the premise of not departing from spirit of that invention range, various changes and improvements may be made to the invention,
These changes and improvements all fall within the protetion scope of the claimed invention.The scope of protection of present invention by claims and
Its equivalent thereof.
Claims (8)
1. a kind of multi-layer annular Terahertz Meta Materials wave absorbing device, it is characterised in that: the metallic reflection plate including being placed in bottom, it is described
The top of metallic reflection plate has multilayered structure；The multilayered structure includes at least one layer of medium substrate, each medium substrate
Top is equipped with resonant element, is coated with high impedance surface on the resonant element.
2. multi-layer annular Terahertz Meta Materials wave absorbing device according to claim 1, it is characterised in that: the multilayered structure packet
The resonant element above three layers of medium substrate and each medium substrate is included, first layer is identical with third layer resonant element structure, by
Two concentric loops are constituted, second layer resonant element by two six side annular resonant elements and ring center hexagon resonant element
It constitutes, passes through the identical trapezoidal resonant element connection of six sizes between two six side annular resonant elements.
3. multi-layer annular Terahertz Meta Materials wave absorbing device according to claim 2, it is characterised in that: first layer and third layer
Annulus resonant cell dimension it is identical, the outer diameter r of the annulus resonant element of outer layer1=13 μm, internal diameter r2=11 μm, the circle of internal layer
Ring resonant element outer diameter r3=9 μm, internal diameter r4=7 μm.
4. multi-layer annular Terahertz Meta Materials wave absorbing device according to claim 2, it is characterised in that: the second layer is humorous
Shake unit, and outer layer is that side length isThe hexagonal rings resonant element that width is 1.2 μm, six side annular resonant element of internal layer
It is by side lengthHexagon to clip radius be that 7 μm of circular patch obtains, the hexagon resonant element side length at center
ForA length of 0.6 μm of the upper bottom of trapezoidal resonant element is gone to the bottom a length of 3 μm, a height of 5 μm.
5. multi-layer annular Terahertz Meta Materials wave absorbing device according to claim 2, it is characterised in that: on every layer of resonant element
The high impedance surface of coating is conductive carbon paste, and the sheet resistance of first layer conductive carbon paste is 500ohm/sq, the side of second layer conductive carbon paste
Resistance is 200ohm/sq, and the sheet resistance of third layer conductive carbon paste is 550ohm/sq.
6. multi-layer annular Terahertz Meta Materials wave absorbing device according to claim 2, it is characterised in that: first layer medium substrate
With a thickness of 1.5 μm, the thickness of the second layer and third layer medium substrate is 1 μm.
7. multi-layer annular Terahertz Meta Materials wave absorbing device according to claim 1, it is characterised in that: the medium substrate
Dielectric constant is 3.5, loss angle tangent 0.0027.
8. multi-layer annular Terahertz Meta Materials wave absorbing device according to claim 1, it is characterised in that: the bottom reflecting plate
Using metallic reflection plate, material is gold.
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Cited By (8)
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| CN110308159A (en) * | 2019-06-26 | 2019-10-08 | 西南大学 | A kind of Meta Materials suction wave sensor of X-band |
| CN111883935A (en) * | 2020-09-03 | 2020-11-03 | 浙江科技学院 | Terahertz wave absorber based on graphene metamaterial |
| CN112448170A (en) * | 2020-11-27 | 2021-03-05 | 中国人民解放军空军工程大学 | P-S frequency band ultra-wideband wave-absorbing super-structure surface and low-scattering system |
| CN113359220A (en) * | 2021-06-10 | 2021-09-07 | 浙江大学 | Spectral filter based on three-dimensional annular structure and application |
| CN113406815A (en) * | 2021-05-19 | 2021-09-17 | 华南理工大学 | Terahertz active super-surface amplitude type spatial modulator |
| CN113933269A (en) * | 2021-11-17 | 2022-01-14 | 中国计量大学 | Metamaterial chip for detecting two food additives based on terahertz fingerprint spectrum |
| CN114784516A (en) * | 2022-04-27 | 2022-07-22 | 中国人民解放军国防科技大学 | Metamaterial-based four-frequency-band terahertz absorber implementation method |
| CN115882235A (en) * | 2023-03-09 | 2023-03-31 | 南京邮电大学 | Wave absorbing unit based on high-resistance resonant ring and broadband metamaterial wave absorber |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110308159B (en) * | 2019-06-26 | 2022-06-17 | 西南大学 | X-waveband metamaterial wave-absorbing sensor |
| CN110308159A (en) * | 2019-06-26 | 2019-10-08 | 西南大学 | A kind of Meta Materials suction wave sensor of X-band |
| CN111883935B (en) * | 2020-09-03 | 2022-05-20 | 浙江科技学院 | Terahertz wave absorber based on graphene metamaterial |
| CN111883935A (en) * | 2020-09-03 | 2020-11-03 | 浙江科技学院 | Terahertz wave absorber based on graphene metamaterial |
| CN112448170A (en) * | 2020-11-27 | 2021-03-05 | 中国人民解放军空军工程大学 | P-S frequency band ultra-wideband wave-absorbing super-structure surface and low-scattering system |
| CN112448170B (en) * | 2020-11-27 | 2023-11-14 | 中国人民解放军空军工程大学 | Ultra-wideband wave-absorbing super-structured surface of P-S frequency band and low scattering system |
| CN113406815A (en) * | 2021-05-19 | 2021-09-17 | 华南理工大学 | Terahertz active super-surface amplitude type spatial modulator |
| CN113359220B (en) * | 2021-06-10 | 2022-04-19 | 浙江大学 | Spectral filter based on three-dimensional annular structure and application |
| CN113359220A (en) * | 2021-06-10 | 2021-09-07 | 浙江大学 | Spectral filter based on three-dimensional annular structure and application |
| CN113933269A (en) * | 2021-11-17 | 2022-01-14 | 中国计量大学 | Metamaterial chip for detecting two food additives based on terahertz fingerprint spectrum |
| CN113933269B (en) * | 2021-11-17 | 2024-01-09 | 中国计量大学 | Metamaterial chip for detecting food additives based on terahertz fingerprint spectrum |
| CN114784516A (en) * | 2022-04-27 | 2022-07-22 | 中国人民解放军国防科技大学 | Metamaterial-based four-frequency-band terahertz absorber implementation method |
| CN115882235A (en) * | 2023-03-09 | 2023-03-31 | 南京邮电大学 | Wave absorbing unit based on high-resistance resonant ring and broadband metamaterial wave absorber |
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