CN105655719A - Electromagnetic wave transmission enhancement device - Google Patents
Electromagnetic wave transmission enhancement device Download PDFInfo
- Publication number
- CN105655719A CN105655719A CN201610012561.2A CN201610012561A CN105655719A CN 105655719 A CN105655719 A CN 105655719A CN 201610012561 A CN201610012561 A CN 201610012561A CN 105655719 A CN105655719 A CN 105655719A
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- hole
- media particle
- electromagnetic wave
- electromgnetically
- transparent
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 35
- 239000002245 particle Substances 0.000 claims abstract description 83
- 239000000463 material Substances 0.000 claims description 19
- 239000011591 potassium Substances 0.000 claims description 6
- 229910052700 potassium Inorganic materials 0.000 claims description 6
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 5
- 238000005728 strengthening Methods 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims 1
- 229910052719 titanium Inorganic materials 0.000 claims 1
- 239000010936 titanium Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 15
- 239000002184 metal Substances 0.000 abstract description 15
- 230000002708 enhancing effect Effects 0.000 abstract description 7
- 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
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical group O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 13
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 239000004408 titanium dioxide Substances 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 150000001398 aluminium Chemical class 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000004807 localization Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001902 propagating effect Effects 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
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 238000012512 characterization method Methods 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
- 230000003247 decreasing effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 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
- 150000003109 potassium Chemical class 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 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 invention relates to the field of the electromagnetic wave technology and particularly relates to an electromagnetic wave transmission enhancement device. The electromagnetic wave transmission enhancement device is used for enhancing the transmission capability of incident plane electromagnetic waves. The device comprises a metal plate. The metal plate is provided with a through hole. The through hole is of a sub-wavelength structure. A dielectric particle is arranged inside the through hole. The dielectric particle extends of the two sides of the through hole. The resonant frequency of the particle dielectric is equal to the frequency of the incident plane electromagnetic waves. According to the technical scheme of the invention, the electromagnetic wave transmission enhancement device is designed based on the dielectric resonant coupling principle. In this way, the transmission enhancement effect of incident electromagnetic waves in the metal hole of the sub-wavelength structure is realized. The device is simple in structure, small in size, and convenient in device miniaturization and integration.
Description
Technical field
The present invention relates to electromagnetic wave technical field, relate in particular to a kind of Electromgnetically-transparent intensifier.
Background technology
In the various electronic devices taking electromagnetic wave as transmission medium, low this problem of the transmissivity of ubiquity electromagnetic wave in sub-wavelength metallic hole. In general, thick metal level can not transmission incident electromagnetic wave. If the size in the hole forming at metal level is more much smaller than the wavelength of incident electromagnetic wave, the electromagnetic intensity of transmission obviously reduces so. But, if periodically arrange multiple sub-wavelength apertures on metal level, because making electromagnetic transmissivity, exciting of surface plasma obviously increase so.
This is to realize Electromgnetically-transparent in the surface plasmon polariton phenomenon of utilizing metal surface to excite to strengthen. Specifically, one is positioned at the sub-wavelength metallic hole of sub-wavelength metallic hole array center or periodicity groove central authorities exactly, has and makes the electromagnetic wave of particular job frequency range produce the effect that transmission strengthens. But surface plasma is coupled, the sub-wavelength metallic hole transmission enhancing causing can be subject to some restrictions in application. Such as, the bandwidth of transmission spectrum is extremely narrow, the thickness of metal film makes transmissivity be index decreased etc.
Summary of the invention
Given this, the present invention proposes a kind of sub-wavelength metallic hole Electromgnetically-transparent intensifier that is different from surface plasmon polariton principle. This Electromgnetically-transparent intensifier is simple in structure, and size is little, is convenient to device miniaturization and integrated.
The Electromgnetically-transparent intensifier that the present invention proposes, for strengthening the electromagnetic transmission capacity of plane of incidence, comprises metallic plate, is provided with a through hole on this metallic plate, and this through hole is sub-wavelength structure; A media particle is set in this through hole, and this media particle stretches out from these through hole both sides; The resonant frequency of this media particle equals the electromagnetic frequency of this plane of incidence.
Further, the absolute value of the temperature coefficient of permittivity of this Electromgnetically-transparent intensifier media particle is greater than 100 × 10-6/℃。
Further, the material of the media particle of this Electromgnetically-transparent intensifier is titanium dioxide or potassium tantalate.
A branch of plane electromagnetic wave is in the process of propagating forward, if run into the structure of transmission sudden change, such as, the through hole of sub-wavelength yardstick on metallic plate, most of electromagnetic energy can be reflected back by metallic plate, and the electromagnetic energy that sees through through hole arrival metallic plate opposite side is very low. Bethe theory thinks, incident electromagnetic wave is to the transmissivity of sub-wavelength metallic hole and (d/ λ)4Be directly proportional, that is to say, if when 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 much smaller than 1.
The Electromgnetically-transparent intensifier that the present invention proposes is used for strengthening the electromagnetic transmission capacity of plane of incidence. This Electromgnetically-transparent intensifier is provided with the through hole of a sub-wavelength structure on metallic plate, and a media particle is set in this through hole, and this media particle stretches out from these through hole both sides; The resonant frequency of this media particle equals the electromagnetic frequency of this plane of incidence. Under the incident electromagnetic wave excitation equating with the resonant frequency of this media particle in frequency, media particle in media particle inside, forms the region of electromagnetic energy height localization by most of electromagnetic energy absorption in incident space in media particle inside. On the other hand, this media particle absorbs the electromagnetic energy in incident space behind the inside of this sub-wavelength structure metal aperture effectively, again this electromagnetic energy is radiate, thereby plane of incidence electromagnetic wave is transmitted to the opposite side of metallic plate from a side of metallic plate.
The Electromgnetically-transparent intensifier that the present invention proposes adopts dielectric resonance coupling principle, has realized the transmission of incident electromagnetic wave in sub-wavelength structure metal aperture and has strengthened effect. This Electromgnetically-transparent intensifier is simple in structure, and size is little, is convenient to device miniaturization and integrated.
Brief description of the drawings
Accompanying drawing is herein merged in description and forms the part of this description, shows embodiment according to the invention, and is used from and explains principle of the present invention with description one.
Fig. 1 is the forward schematic diagram of the embodiment of the present invention 2 Electromgnetically-transparent intensifiers;
Fig. 2 is the side schematic view of the embodiment of the present invention 2 Electromgnetically-transparent intensifiers;
Fig. 3 is the transmissivity test curve figures of the embodiment of the present invention 2 Electromgnetically-transparent intensifiers in the time not placing media particle;
Fig. 4 is the transmissivity test curve figures of the embodiment of the present invention 2 Electromgnetically-transparent intensifiers in the time placing media particle;
Fig. 5 is that the transmission of the embodiment of the present invention 2 Electromgnetically-transparent intensifiers strengthens the temperature variant curve map of crest frequency;
Wherein, 1 is metallic plate, and 2 is media particle, 3 through holes that are sub-wavelength structure.
Detailed description of the invention
For making object, technical scheme and the advantage of embodiment clearer, below in conjunction with the accompanying drawing in embodiment, the technical scheme in embodiment is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiment. Based on following embodiment, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
The present embodiment Electromgnetically-transparent intensifier, for strengthening the electromagnetic transmission capacity of plane of incidence, comprises metallic plate, is provided with a through hole on this metallic plate, and this through hole is sub-wavelength structure; A media particle is set in this through hole, and this media particle stretches out from these through hole both sides; The resonant frequency of this media particle equals the electromagnetic frequency of this plane of incidence.
A branch of plane electromagnetic wave is in the process of propagating forward, if run into the structure of transmission sudden change, such as, the through hole of sub-wavelength yardstick on metallic plate, most of electromagnetic energy can be reflected back by metallic plate, and the electromagnetic energy that sees through through hole arrival metallic plate opposite side is very low. Bethe theory thinks, incident electromagnetic wave is to the transmissivity of sub-wavelength metallic hole and (d/ λ)4Be directly proportional, that is to say, if when 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 much smaller than 1.
The present embodiment Electromgnetically-transparent intensifier is provided with the through hole of a sub-wavelength structure on metallic plate, and a media particle is set in this through hole, and this media particle stretches out from these through hole both sides; The resonant frequency of this media particle equals the electromagnetic frequency of plane of incidence. Under the incident electromagnetic wave excitation equating with the resonant frequency of this media particle in frequency, media particle in media particle inside, forms the region of electromagnetic energy height localization by most of electromagnetic energy absorption in incident space in media particle inside. On the other hand, this media particle absorbs the electromagnetic energy in incident space behind the inside of this sub-wavelength structure metal aperture effectively, again this electromagnetic energy is radiate, thereby plane of incidence electromagnetic wave is transmitted to the opposite side of metallic plate from a side of metallic plate.
The present embodiment Electromgnetically-transparent intensifier adopts dielectric resonance coupling principle, has realized the transmission of incident electromagnetic wave in sub-wavelength metallic hole and has strengthened effect. This transmission intensifier is simple in structure, and size is little, is convenient to device miniaturization and integrated.
According to the frequency of incident electromagnetic wave and wavelength, prepare through hole and the media particle of sub-wavelength structure.
Because the operating frequency of Electromgnetically-transparent intensifier is identical with the resonant frequency of media particle, strengthen effect so realize the sub-wavelength metallic hole transmission at a certain frequency place, the resonant frequency that needs design media particle, makes the resonant frequency of this media particle equal the electromagnetic frequency of this plane of incidence.
Conventionally, the resonant frequency of media particle is jointly to be determined by the dielectric constant of its material and the size of media particle. The dielectric constant of material is higher, and corresponding resonant frequency is lower; The size of media particle is larger, and its corresponding resonant frequency is also lower. So, by improving the dielectric constant of material, the size that just can greatly dwindle media particle. Therefore,, for making the resonant frequency of media particle can meet the needs of sub-wavelength metallic hole transmission intensifier, need to select high-k, low-loss material. On the other hand, be not dissipated in order to make electromagnetic energy concentrate on better the inside of media particle, the material of low dielectric loss angle tangent is also very necessary.
Preferably, the dielectric constant of this media particle is greater than 10; The dielectric loss angle tangent of media particle is less than 0.1.
Preferably, the material of this media particle is titanium dioxide or potassium tantalate.
Preferably, the shape of the present embodiment Electromgnetically-transparent intensifier media particle can be spheroid, square, cuboid or arbitrary shape, media particle outline will adapt with corresponding sub-wavelength metallic hole, can put into this sub-wavelength metallic hole to ensure media particle, and can reserve certain gap between metal aperture and media particle, make media particle and incident electromagnetic wave that good coupling occur, radiate from the opposite side of metallic plate.
Preferably, the media particle of the present embodiment Electromgnetically-transparent intensifier stretches out from these through hole both sides, to ensure most of electromagnetic energy absorption in incident space in media particle inside.
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-sectional profiles of the through hole of the sub-wavelength structure on the present embodiment Electromgnetically-transparent intensifier metallic plate can be circle, ellipse, triangle, square, rectangle or irregularly shaped arbitrarily.
Preferably, can be mechanically on metallic plate, as boring or chemical method, as the method for chemical etching obtains this through hole.
Further, adopt the material of high-k temperature coefficient to prepare this media particle, change with environment temperature with the resonant frequency that realizes this media particle, thereby the temperature that realizes this Electromgnetically-transparent intensifier transmission enhancing crest frequency is adjustable, also realizes the adjustable sub-wavelength metallic hole Electromgnetically-transparent intensifier of a class temperature.
The temperature coefficient of permittivity of media particle material can be positive temperature coefficient or negative temperature coefficient. If adopt the material of negative permittivity temperature coefficient, the transmission of this Electromgnetically-transparent intensifier enhancing crest frequency moves to high frequency direction with the rising of temperature; If adopt the material of positive temperature coefficient, the transmission of this Electromgnetically-transparent intensifier enhancing crest frequency moves to low frequency direction with the rising of temperature.
Preferably, the absolute value of the temperature coefficient of permittivity of this media particle is greater than 100 × 10-6/℃。
Due to the resonant frequency of media particle vary with temperature obvious, so there is obvious advantage in the application of the present embodiment Electromgnetically-transparent intensifier regulated and controled device relevant with temperature at some. As, be applied in temperature adjustable electromagnetic switch. Specifically, in a certain temperature, the incident electromagnetic wave identical with the resonant frequency of media particle at this temperature can pass through; But when temperature changes, the resonant frequency of media particle is followed and changed, and the incident electromagnetic wave of said frequencies can not pass through, thereby realize the function of temperature switch.
Embodiment 2
Fig. 1, Fig. 2 are respectively forward schematic diagram and the side schematic view of embodiment 2 Electromgnetically-transparent intensifiers. Wherein, 1 is metallic plate, and 2 is media particle, 3 through holes that are sub-wavelength structure. The center of media particle 2 and the center superposition of this through hole also stretch out from through hole 3 both sides, and the overhang of both sides equates. Plane electromagnetic wave incides in media particle 2 and through hole 3 from a side of metallic plate 1, in the through hole 3 of sub-wavelength structure, and media particle 2 and through hole 3 resonance couplings, and this plane of incidence electromagnetic wave of radiation is to the opposite side of metallic plate 1.
More specifically, be to adopt mechanical punching to obtain the square through-hole that the length of side is 5mm on 1mm, the aluminium sheet of size for 30mm × 15mm at thickness. In this square through-hole, placing the length of side is 2.2mm cube titanium dioxide media particle. This titanium dioxide media particle is to be formed by the massive material cutting that sintering forms at 900 DEG C. The dielectric constant of this titanium dioxide media particle is 98, and dielectric loss angle tangent is 0.001, and temperature coefficient of permittivity is-1000 × 10-6/ DEG C. Through test, the resonant frequency of this media particle is 11.65GHz. Therefore, above-mentioned through hole and above-mentioned media particle all belong to sub-wavelength yardstick structure.
Do not place media particle, the plane electromagnetic wave that is 11.0GHz～12.5GHz by frequency is aimed at the through hole incident of this aluminium sheet, and the electromagnetic energy of aluminum test both sides. Fig. 3 has provided transmission coefficient curve map, the frequency that wherein abscissa is incident electromagnetic wave, and ordinate is transmissivity. As can be seen from Figure 3, see through the electromagnetic energy of sub-wavelength metallic hole very little, 11.0GHz in the whole frequency range of 12.5GHz all lower than-40dB.
Media particle is put in this sub-wavelength metallic hole, made the center of media particle and the center superposition of this through hole and stretch out from through hole both sides, and the overhang of both sides equates. The plane electromagnetic wave that is 11.0GHz～12.5GHz by frequency is aimed at through hole and the media particle incident of this aluminium sheet, and the electromagnetic energy of aluminum test both sides. Fig. 4 has provided transmission coefficient curve map, and wherein abscissa is the electromagnetic frequency of plane of incidence, and ordinate is transmissivity. As can be seen from Figure 4, at the resonant frequency 11.65GHz place of media particle, electromagnetic wave has increased significantly to the transmissivity of sub-wavelength metallic hole, reaches-25dB.
Further, when environment temperature of living in media particle is elevated to 90 DEG C gradually from 20 DEG C, Fig. 5 has provided the curve map of transmission enhancing crest frequency. As seen from Figure 5, along with the variation of temperature, the frequency that transmission strengthens peak has changed to 12.1GHz from 11.6GHz.
The present embodiment Electromgnetically-transparent intensifier adopts the material of negative permittivity temperature coefficient to prepare media particle, and therefore the transmission of the present embodiment Electromgnetically-transparent intensifier enhancing crest frequency moves to high frequency direction with the rising of temperature.
Above-mentioned media particle adopts titanic oxide material. The present embodiment Electromgnetically-transparent intensifier also can adopt that dielectric constant is 200, dielectric loss angle tangent is 0.001, temperature coefficient of permittivity is-3000 × 10-6/ DEG C potassium tantalate prepare media particle. The potassium tantalate media particle size that resonant frequency equates with this plane of incidence wave frequency will be different from above-mentioned titanium dioxide media particle, but still can meet sub-wavelength yardstick. Correspondingly, for suitable with this potassium tantalate media particle, the size of the sub-wavelength metal through hole on this aluminium sheet and/or shape also need to adjust.
Be noted that above embodiment, only for explanation technological thought of the present invention, can not limit protection scope of the present invention with this. Every technological thought proposing according to the present invention; any change of doing on this Electromgnetically-transparent intensifier basis; comprise the array structure of selecting multiple metal aperture; transmission intensifier and the adjustable transmission intensifier of temperature of the sub-wavelength metallic hole that other high-k temperature coefficient materials, media particle shape and the principle by Scaling realizes while making the operating frequency of metal aperture and media particle bring up to millimere-wave band, terahertz wave band, infrared and optical region, within all falling into protection domain of the present invention.
In description of the invention, it will be appreciated that, term " on ", orientation or the position relationship of the instruction such as D score, " interior ", " outward " be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, construct and operation with specific orientation, therefore can not be interpreted as limitation of the present invention.
In description of the invention, the implication of " multiple " is more than two, unless otherwise expressly limited specifically.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiment " etc. means to describe in conjunction with this embodiment are contained at least one embodiment of the present invention. In this manual, to the schematic statement of above-mentioned term not must for be identical embodiment. And, specific features, structure, material or the feature of description can one or more embodiment in office in suitable mode combination. In addition,, not conflicting in the situation that, those skilled in the art can carry out combination and combination by the feature of the different embodiment that describe in this description and different embodiment.
Although illustrated and described embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, amendment, replacement and modification.
Claims (3)
1. an Electromgnetically-transparent intensifier, for strengthening the electromagnetic transmission capacity of plane of incidence, is characterized in that, comprises metalPlate, is provided with a through hole on described metallic plate, described through hole is sub-wavelength structure; A medium is set in described through holeGrain, described media particle stretches out from described through hole both sides; The resonant frequency of described media particle equals described plane of incidence electromagnetic waveFrequency.
2. Electromgnetically-transparent intensifier according to claim 1, is characterized in that, the dielectric constant temperature of described media particleThe absolute value of coefficient is greater than 100 × 10-6/℃。
3. Electromgnetically-transparent intensifier according to claim 1, is characterized in that, the material of described media particle is titanium dioxideTitanium or potassium tantalate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610012561.2A CN105655719B (en) | 2016-01-07 | 2016-01-07 | Electromgnetically-transparent intensifier |
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| CN201610012561.2A CN105655719B (en) | 2016-01-07 | 2016-01-07 | Electromgnetically-transparent intensifier |
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| CN105655719B CN105655719B (en) | 2017-11-17 |
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| CN107046179A (en) * | 2016-09-18 | 2017-08-15 | 北京邮电大学 | A kind of super surface of adjustable dielectric |
| 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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| WO2007008440A2 (en) * | 2005-07-08 | 2007-01-18 | The Board Of Trustees Of The University Of Illinois | Photonic crystal biosensor fabrication method |
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| CN105655719B (en) | 2017-11-17 |
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