CN105655719B - Electromgnetically-transparent intensifier - Google Patents
Electromgnetically-transparent intensifier Download PDFInfo
- Publication number
- CN105655719B CN105655719B CN201610012561.2A CN201610012561A CN105655719B CN 105655719 B CN105655719 B CN 105655719B CN 201610012561 A CN201610012561 A CN 201610012561A CN 105655719 B CN105655719 B CN 105655719B
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- Prior art keywords
- hole
- media particle
- electromgnetically
- intensifier
- transparent
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 239000002245 particle Substances 0.000 claims abstract description 85
- 230000005540 biological transmission Effects 0.000 claims abstract description 30
- 238000005728 strengthening Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 19
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 11
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 6
- 239000011591 potassium Substances 0.000 claims description 6
- 229910052700 potassium Inorganic materials 0.000 claims description 6
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 18
- 239000002184 metal Substances 0.000 abstract description 18
- 230000002708 enhancing effect Effects 0.000 abstract description 13
- 230000008878 coupling Effects 0.000 abstract description 5
- 238000010168 coupling process Methods 0.000 abstract description 5
- 238000005859 coupling reaction Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 239000004411 aluminium Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000004807 localization Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035772 mutation Effects 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- HGWOWDFNMKCVLG-UHFFFAOYSA-N [O--].[O--].[Ti+4].[Ti+4] Chemical compound [O--].[O--].[Ti+4].[Ti+4] HGWOWDFNMKCVLG-UHFFFAOYSA-N 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000000411 transmission spectrum Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
- H01Q15/08—Refracting or diffracting devices, e.g. lens, prism formed of solid dielectric material
Abstract
The present invention relates to electromagnetic wave technology field, more particularly to a kind of Electromgnetically-transparent intensifier.Electromgnetically-transparent intensifier proposed by the present invention, for strengthening the transmission capacity of plane of incidence electromagnetic wave, including metallic plate, a through hole is provided with the metallic plate, the through hole is sub-wavelength structure；One media particle is set in the through hole, and the media particle stretches out from the through hole both sides；The resonant frequency of the media particle is equal to the frequency of the plane of incidence electromagnetic wave.Electromgnetically-transparent intensifier of the present invention uses dielectric resonance coupling principle, realizes transmission enhancing effect of the incident electromagnetic wave in sub-wavelength structure metal aperture, and simple in construction, size is small, is easy to device miniaturization and integrated.
Description
Technical field
The present invention relates to electromagnetic wave technology field, more particularly to a kind of Electromgnetically-transparent intensifier.
Background technology
Various using electromagnetic wave as in the electronic device of transmission medium, generally existing electromagnetic wave is in sub-wavelength metallic hole
This low problem of transmissivity.In general, thick metal level can not transmit incident electromagnetic wave.If in the hole that metal level is formed
Size is more much smaller than the wavelength of incident electromagnetic wave, then the intensity of transmitted electromagnetic wave substantially reduces.If however, on the metal layer
It is periodically arranged multiple sub-wavelength apertures, then the transmissivity of electromagnetic wave is substantially increased due to exciting for surface plasma
Greatly.
This be the surface plasmon polariton phenomenon excited using metal surface come realize Electromgnetically-transparent strengthen.Tool
It is exactly a sub-wavelength metallic hole positioned at sub-wavelength metallic hole array center or periodicity groove center, having makes for body
The electromagnetic wave of particular job frequency range produces the effect of transmission enhancing.But sub-wavelength metallic hole transmission caused by surface plasma coupling
Enhancing in the application can be somewhat limited.For example the bandwidth of transmission spectrum is extremely narrow, the thickness of metal film makes transmissivity in finger
Number decline etc..
The content of the invention
In consideration of it, the present invention proposes a kind of sub-wavelength metallic hole electromagnetic wave different from surface plasmon polariton principle
Transmit intensifier.The Electromgnetically-transparent intensifier is simple in construction, and size is small, is easy to device miniaturization and integrated.
Electromgnetically-transparent intensifier proposed by the present invention, for strengthening the transmission capacity of plane of incidence electromagnetic wave, including
Metallic plate, a through hole is provided with the metallic plate, the through hole is sub-wavelength structure；One media particle is set in the through hole,
The media particle stretches out from the through hole both sides；The resonant frequency of the media particle is equal to the frequency of the plane of incidence electromagnetic wave.
Further, the absolute value of the temperature coefficient of permittivity of the Electromgnetically-transparent intensifier media particle is more than
100×10-6/℃。
Further, the material of the media particle of the Electromgnetically-transparent intensifier is titanium dioxide or potassium tantalate.
A branch of plane electromagnetic wave is during propagating forward, if the structure of transmission mutation is run into, such as, on metallic plate
The through hole of sub-wavelength dimensions, then most of electromagnetic energy can be reflected back by metallic plate, through through hole reach metallic plate opposite side
Electromagnetic energy it is very low.Bethe theories think, transmissivity and (d/ λ) of the incident electromagnetic wave to sub-wavelength metallic hole4Cheng Zheng
Than, that is to say, that if the aperture d of through hole is much smaller than the wavelength X of incident light on metallic plate, the efficiency of transmission of plane electromagnetic wave is remote
Less than 1.
Electromgnetically-transparent intensifier proposed by the present invention is used for the transmission capacity for strengthening plane of incidence electromagnetic wave.The electromagnetism
Ripple transmission intensifier is provided with the through hole of a sub-wavelength structure on a metal plate, and a media particle is set in the through hole,
The media particle stretches out from the through hole both sides；The resonant frequency of the media particle is equal to the frequency of the plane of incidence electromagnetic wave.
Under the frequency incoming electromagnetic wave excitation equal with the resonant frequency of the media particle, media particle is by the major part in incident space
Electromagnetic energy absorption is internally formed the region of an electromagnetic energy height localization inside media particle, in media particle.Separately
On the one hand, after the media particle is effectively absorbed into the electromagnetic energy in incident space the inside of the sub-wavelength structure metal aperture,
The electromagnetic energy is radiate again, so as to which plane of incidence electromagnetic wave is transmitted into the another of metallic plate from the side of metallic plate
Side.
Electromgnetically-transparent intensifier proposed by the present invention uses dielectric resonance coupling principle, realizes incident electromagnetic wave and exists
Transmission enhancing effect in sub-wavelength structure metal aperture.The Electromgnetically-transparent intensifier is simple in construction, and size is small, is easy to device
Minimize and integrated.
Brief description of the drawings
Accompanying drawing herein is merged in specification and forms the part of this specification, shows the implementation for meeting the present invention
Example, and for explaining principle of the invention together with specification.
Fig. 1 is the positive schematic diagram of the Electromgnetically-transparent intensifier of the embodiment of the present invention 2；
Fig. 2 is the side schematic view of the Electromgnetically-transparent intensifier of the embodiment of the present invention 2；
Fig. 3 is that transmissivity test of the Electromgnetically-transparent intensifier of the embodiment of the present invention 2 when not placing media particle is bent
Line chart；
Fig. 4 is transmissivity test curve of the Electromgnetically-transparent intensifier of the embodiment of the present invention 2 when placing media particle
Figure；
Fig. 5 is the song that the transmission enhancing crest frequency of the Electromgnetically-transparent intensifier of the embodiment of the present invention 2 varies with temperature
Line chart；
Wherein, 1 is metallic plate, and 2 be media particle, and 3 be the through hole of sub-wavelength structure.
Embodiment
To make the purpose, technical scheme and advantage of embodiment clearer, below in conjunction with the accompanying drawing in embodiment, to reality
The technical scheme applied in example is clearly and completely described, it is clear that described embodiment is only the part implementation of the present invention
Example, rather than whole embodiments.Based on following embodiments, those of ordinary skill in the art are not before creative work is made
The every other embodiment obtained is put, belongs to the scope of protection of the invention.
Embodiment 1
The present embodiment Electromgnetically-transparent intensifier, for strengthening the transmission capacity of plane of incidence electromagnetic wave, including metal
Plate, a through hole is provided with the metallic plate, the through hole is sub-wavelength structure；One media particle, Jie are set in the through hole
Matter particle stretches out from the through hole both sides；The resonant frequency of the media particle is equal to the frequency of the plane of incidence electromagnetic wave.
A branch of plane electromagnetic wave is during propagating forward, if the structure of transmission mutation is run into, such as, on metallic plate
The through hole of sub-wavelength dimensions, then most of electromagnetic energy can be reflected back by metallic plate, through through hole reach metallic plate opposite side
Electromagnetic energy it is very low.Bethe theories think, transmissivity and (d/ λ) of the incident electromagnetic wave to sub-wavelength metallic hole4Cheng Zheng
Than, that is to say, that if the aperture d of through hole is much smaller than the wavelength X of incident light on metallic plate, the efficiency of transmission of plane electromagnetic wave is remote
Less than 1.
The present embodiment Electromgnetically-transparent intensifier is provided with the through hole of a sub-wavelength structure, the through hole on a metal plate
One media particle of interior setting, the media particle stretch out from the through hole both sides；The resonant frequency of the media particle is equal to incident flat
The frequency of face electromagnetic wave.Under the frequency incoming electromagnetic wave excitation equal with the resonant frequency of the media particle, media particle will
Most of electromagnetic energy absorption in incident space is internally formed an electromagnetic energy height inside media particle, in media particle
The region of localization.On the other hand, the electromagnetic energy in incident space is effectively absorbed into the sub-wavelength structure by the media particle
Behind the inside of metal aperture, and the electromagnetic energy is radiate, so as to which plane of incidence electromagnetic wave be transmitted from the side of metallic plate
To the opposite side of metallic plate.
The present embodiment Electromgnetically-transparent intensifier uses dielectric resonance coupling principle, realizes incident electromagnetic wave in sub- ripple
Transmission enhancing effect in long metal aperture.The transmission intensifier is simple in construction, and size is small, is easy to device miniaturization and integrates
Change.
According to the frequency and wavelength of incident electromagnetic wave, the through hole and media particle of sub-wavelength structure are prepared.
Because the working frequency of Electromgnetically-transparent intensifier and the resonant frequency of media particle are identical, so to realize certain
Sub-wavelength metallic hole transmission enhancing effect at one frequency, need to design the resonant frequency of media particle, make the humorous of the media particle
Vibration frequency is equal to the frequency of the plane of incidence electromagnetic wave.
Generally, the resonant frequency of media particle is together decided on by the dielectric constant of its material and the size of media particle
's.The dielectric constant of material is higher, and corresponding resonant frequency is lower；The size of media particle is bigger, its corresponding resonant frequency
Also it is lower.So dielectric constant by improving material, so that it may be substantially reduced the size of media particle.Therefore, to make medium
The resonant frequency of grain can meet the needs of sub-wavelength metallic hole transmission intensifier, it is necessary to select high-k, low-loss
Material.On the other hand, in order that electromagnetic energy preferably concentrates on the inside of media particle without being dissipated, low dielectric loss
The material of angle tangent is also very necessary.
Preferably, the dielectric constant of the media particle is more than 10；The dielectric loss angle tangent of media particle is less than 0.1.
Preferably, the material of the media particle is titanium dioxide or potassium tantalate.
Preferably, the shape of the present embodiment Electromgnetically-transparent intensifier media particle can be spheroid, it is square, rectangular
Body or arbitrary shape, media particle outline will be adapted with corresponding sub-wavelength metallic hole, to ensure that media particle can be put
Enter the sub-wavelength metallic hole, and certain gap can be reserved between metal aperture and media particle, make media particle and enter radio
Good coupling occurs for magnetic wave, is radiate from the opposite side of metallic plate.
Preferably, the media particle of the present embodiment Electromgnetically-transparent intensifier from the through hole both sides stretch out, with ensure by
Most of electromagnetic energy absorption in incident space is inside media particle.
The metallic plate of the present embodiment Electromgnetically-transparent intensifier can be made up of materials such as gold, silver, copper, aluminium.
Preferably, the cross section wheel of the through hole of the sub-wavelength structure on the present embodiment Electromgnetically-transparent intensifier metallic plate
Exterior feature can be circle, ellipse, triangle, square, rectangle or any irregular shape.
Preferably, on a metal plate can mechanically, such as drilling or chemical method, as the method for chemical etching obtains
The through hole.
Further, the media particle is prepared using the material of high-k temperature coefficient, to realize the media particle
Resonant frequency change with environment temperature, so as to realize the Electromgnetically-transparent intensifier transmission enhancing crest frequency temperature
It is adjustable, namely realize the adjustable sub-wavelength metallic hole Electromgnetically-transparent intensifier of a kind of temperature.
The temperature coefficient of permittivity of media particle material can be positive temperature coefficient or negative temperature coefficient.According to negative Jie
The material of electric constant temperature coefficient, then the transmission enhancing crest frequency of the Electromgnetically-transparent intensifier with the rise of temperature to height
Move in frequency direction；According to the material of positive temperature coefficient, then the transmission enhancing crest frequency of the Electromgnetically-transparent intensifier with
The rise of temperature is moved to low frequency direction.
Preferably, the absolute value of the temperature coefficient of permittivity of the media particle is more than 100 × 10-6/℃。
Due to the resonant frequency of media particle vary with temperature it is obvious, so the present embodiment Electromgnetically-transparent enhancing dress
Put has obvious advantage in the application of some controllable devices relevant with temperature.Such as, apply in temperature adjustable electromagnetism
In switch.Specifically, in a certain temperature, can lead to the resonant frequency identical incident electromagnetic wave of media particle at this temperature
Cross；But when temperature changes, the resonant frequency of media particle, which follows, to change, and the incident electromagnetic wave of said frequencies can not
By so as to realize the function of temperature switch.
Embodiment 2
Fig. 1, Fig. 2 are respectively the positive schematic diagram and side schematic view of the Electromgnetically-transparent intensifier of embodiment 2.Wherein, 1
It is media particle for metallic plate, 2,3 be the through hole of sub-wavelength structure.The center of media particle 2 and the center superposition of the through hole are simultaneously
Stretched out from the both sides of through hole 3, and the overhang of both sides is equal.Plane electromagnetic wave from the side of metallic plate 1 incide media particle 2 and
In through hole 3, in the through hole 3 of sub-wavelength structure, media particle 2 couples with the resonance of through hole 3, and radiates the plane of incidence electromagnetic wave
To the opposite side of metallic plate 1.
More specifically, thickness be 1mm, size be used on 30mm × 15mm aluminium sheet mechanical punching obtain the length of side for
5mm square through-hole.It is 2.2mm cube titania dielectric particles that the length of side is placed in the square through-hole.The titanium dioxide
Titanium media particle is formed by the massive material cutting sintered at 900 DEG C.The dielectric of the titania dielectric particle is normal
Number is 98, dielectric loss angle tangent 0.001, and temperature coefficient of permittivity is -1000 × 10-6/℃.By test, the medium
The resonant frequency of particle is 11.65GHz.Therefore, above-mentioned through hole and above-mentioned media particle belong to sub-wavelength dimensions structure.
Media particle is not placed, the through hole that the plane electromagnetic wave that frequency is 11.0GHz~12.5GHz is aligned to the aluminium sheet enters
Penetrate, and the electromagnetic energy of aluminum test both sides.Fig. 3 gives transmission coefficient curve map, and wherein abscissa is incident electromagnetic wave
Frequency, ordinate are transmissivity.As can be seen from Figure 3, it is very small through the electromagnetic energy of sub-wavelength metallic hole, in 11.0GHz
- 40dB is below on to 12.5GHz whole frequency range.
Media particle is put into the sub-wavelength metallic hole so that the center of media particle and the center superposition of the through hole
And stretched out from through hole both sides, and the overhang of both sides is equal.The plane electromagnetic wave that frequency is 11.0GHz~12.5GHz is aligned
The through hole and media particle of the aluminium sheet are incident, and the electromagnetic energy of aluminum test both sides.Fig. 4 gives transmission coefficient curve map,
Wherein abscissa is the frequency of plane of incidence electromagnetic wave, and ordinate is transmissivity.Figure 4, it can be seen that in the humorous of media particle
At vibration frequency 11.65GHz, electromagnetic wave significantly increases to the transmissivity of sub-wavelength metallic hole, reaches -25dB.
Further, by media particle local environment temperature from when being gradually increased to 90 DEG C for 20 DEG C, Fig. 5 gives transmission and increased
The curve map of strong crest frequency.As seen from Figure 5, as the change of temperature, the frequency at transmission enhancing peak change to from 11.6GHz
12.1GHz.
The present embodiment Electromgnetically-transparent intensifier prepares media particle using the material of negative permittivity temperature coefficient, because
The transmission enhancing crest frequency of this present embodiment Electromgnetically-transparent intensifier moves with the rise of temperature to high frequency direction.
Above-mentioned media particle uses titanic oxide material.The present embodiment Electromgnetically-transparent intensifier can also use dielectric normal
Number is 200, dielectric loss angle tangent 0.001, temperature coefficient of permittivity is -3000 × 10-6/ DEG C potassium tantalate come prepare be situated between
Matter particle.The resonant frequency potassium tantalate media particle size equal with the plane of incidence wave frequency will differ from above-mentioned two
Titanium oxide media particle, but still sub-wavelength dimensions can be met.Correspondingly, in order to be adapted with the potassium tantalate media particle, the aluminium
The size and/or shape of sub-wavelength metal through hole on plate is also required to adjust.
It is noted that the technological thought of above example only to illustrate the invention, it is impossible to the protection of the present invention is limited with this
Scope.It is every according to technological thought proposed by the present invention, any change done on the basis of the Electromgnetically-transparent intensifier,
Including the array structure from multiple metal apertures, other high-k temperature coefficient materials, media particle shape, Yi Jitong
Cross the principle of Scaling make metal aperture and the working frequency of media particle bring up to millimere-wave band, terahertz wave band, it is infrared and
The adjustable transmission intensifier of transmission intensifier and temperature for the sub-wavelength metallic hole realized during optical region, each falls within the present invention
Within protection domain.
In the description of the invention, it is to be understood that the orientation or position of the instruction such as term " on ", " under ", " interior ", " outer "
It is based on orientation shown in the drawings or position relationship to put relation, is for only for ease of the description present invention and simplifies description, rather than
Indicate or imply that signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore can not
It is interpreted as limitation of the present invention.
In the description of the invention, " multiple " are meant that two or more, unless otherwise specifically defined.
In the description of this specification, the description of reference term " one embodiment ", " some embodiments " etc. means to combine
Specific features, structure, material or the feature of embodiment description are contained at least one embodiment of the present invention.In this theory
In bright book, identical embodiment is necessarily directed to the schematic representation of above-mentioned term.Moreover, the specific features of description,
Structure, material or feature can combine in an appropriate manner in any one or more embodiments.In addition, not conflicting
In the case of, those skilled in the art can be by the different embodiments and the feature of different embodiments described in this specification
It is combined and combines.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (3)
- A kind of 1. Electromgnetically-transparent intensifier, for strengthening the transmission capacity of plane of incidence electromagnetic wave, it is characterised in that including Metallic plate, a through hole is provided with the metallic plate, the through hole is sub-wavelength structure；One medium is set in the through hole Particle, the media particle stretch out from the through hole both sides；The resonant frequency of the media particle is equal to plane of incidence electricity The frequency of magnetic wave, the dielectric constant of the media particle are more than 10.
- 2. Electromgnetically-transparent intensifier according to claim 1, it is characterised in that the dielectric constant of the media particle The absolute value of temperature coefficient is more than 100 × 10-6/℃。
- 3. Electromgnetically-transparent intensifier according to claim 1, it is characterised in that the material of the media particle is two Titanium oxide or potassium tantalate.
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| CN107046179B (en) * | 2016-09-18 | 2020-01-17 | 北京邮电大学 | Adjustable dielectric super surface |
| CN109066094A (en) * | 2018-08-07 | 2018-12-21 | 内蒙古科技大学 | A kind of electromagnetic wave nonlinear transport device |
| CN111180865B (en) * | 2020-02-17 | 2021-08-31 | Oppo广东移动通信有限公司 | Electronic device |
| CN114355487A (en) * | 2021-12-02 | 2022-04-15 | 山东大学 | Terahertz device and preparation method thereof |
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| CN101750651A (en) * | 2009-11-25 | 2010-06-23 | 南京大学 | Electromagnetic wave transmission device with regulative and controllable magnetic field based on sub-monolayer wavelength metal grating and preparation |
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| CN101281297B (en) * | 2008-03-13 | 2010-06-09 | 中国科学院光电技术研究所 | High permeation rate three-dimensional second wavelength metallic structure lens |
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