CN107039722A - A kind of artificial surface plasmon coupling resonance cavity waveguide - Google Patents
A kind of artificial surface plasmon coupling resonance cavity waveguide Download PDFInfo
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- CN107039722A CN107039722A CN201710257785.4A CN201710257785A CN107039722A CN 107039722 A CN107039722 A CN 107039722A CN 201710257785 A CN201710257785 A CN 201710257785A CN 107039722 A CN107039722 A CN 107039722A
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- artificial surface
- waveguide
- grid
- surface plasma
- resonance cavity
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/12—Hollow waveguides
- H01P3/121—Hollow waveguides integrated in a substrate
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Abstract
The invention discloses a kind of artificial surface plasmon coupling resonance cavity waveguide.Rearranged by the artificial surface plasma chamber that shakes, the described artificial surface plasma chamber that shakes is the copper sheet grid being printed on medium bottom plate or the metal helical structure for supporting magnetic dipole pattern.The waveguide is the transmission that surface electromagnetic wave is realized by the weak coupling between surface plasma resonance chamber.Because the surface plasma resonance chamber supports quadravalence mode of resonance and eight rank modes of resonance with quadruple rotational symmetry, so surface electromagnetic wave will not reflect and scatter in the curved waveguide without bending radius by being made up of the resonator, so as to realize the perfect transmission of surface electromagnetic wave, a kind of new integrated platform is provided for following highly integrated plasma circuit.
Description
Technical field
The invention belongs to artificial surface plasma device field, and in particular to a kind of artificial surface plasmon coupling is humorous
Shake cavity waveguide.
Background technology
Surface plasma (optical band is present in a kind of surface electromagnetic wave of metal medium interface) is widely regarded as
A kind of information carrier for holding promise as very much following sub-wavelength Terahertz and optics all-optical integrated circuit.But in low frequency wave
Section, such as microwave, Terahertz and far infrared band, the dielectric constant of metal is close to perfect metal, so electromagnetic wave is in metal
The constraint on surface is very poor, it is impossible to carry out conducted signal as a kind of effective information carrier.Imperial College in 2004
Professor pendry proposes the concept of artificial surface plasma, i.e., introduce hole to increase the skin that becomes of electromagnetic wave in metal surface
Depth, so as to increase constraint of the electromagnetic wave in metal surface.
Traditional artificial surface plasma filled waveguide, such as domino artificial surface plasma filled waveguide (domino
Surface plasmon waveguide) and coplanar artificial surface plasma filled waveguide (conformal surface
Plasmon wavegudie), electromagnetic wave can be constrained in transmission in the range of the sub-wavelength of metal surface.But for passing
The artificial surface plasma filled waveguide of system, because surface electromagnetic wave would generally be produced when by curved waveguide without bending radius
Serious scattering, can not only reduce the efficiency of transmission of signal, and can produce serious signal cross-talk in different integrated devices,
It significantly limit sub-wavelength Terahertz and optics collection help the development of optical circuit.
The content of the invention
A kind of concept of artificial surface plasmon coupling resonance cavity waveguide is proposed in the present invention first and is successfully realized
Surface electromagnetic wave areflexia, perfect without scattering when by waveguide without bending radius are transmitted.Our solution is
Using the weak coupling between a kind of surface plasma resonance chamber for supporting multipole resonance chamber pattern come conduction surfaces electromagnetic wave.By
In the rotational symmetry of multi-mode, such as quadravalence and the quadruple rotational symmetry of eight rank patterns, surface electromagnetic wave by by
Reflection will not be produced during the curved waveguide without bending radius that the resonator is constituted and is scattered, so as to realize signal in wider band
Perfect transmission in width.
The artificial surface plasmon coupling resonance cavity waveguide of the present invention is rearranged by the artificial surface plasma chamber that shakes,
The described artificial surface plasma chamber that shakes is the copper sheet grid that is printed on medium bottom plate or the gold for supporting magnetic dipole pattern
Belong to helical structure.
It is preferred that, the described copper sheet grid being printed on medium bottom plate includes circular copper sheet and all around copper sheet is arranged in
The grid enclosed；Relation between each physical dimension of surface plasma resonance chamber is：2 π R=N*d, wherein R are resonator half
Footpath, N is grid number, and d is the cycle between grid.Maximum gap width a=d/2 between grid and grid.
It is preferred that, the cycle d=1.256mm between described grid, the gap width a=0.628mm between grid,
The length r=9mm of grid, the radius of whole copper dish is R=12mm, and copper thickness is 0.018mm, and the thickness of medium bottom plate is
0.254mm。
It is preferred that, the metal helical structure of described support magnetic dipole pattern includes a spiral center and Duo Gen metals
Spiral arm；Many described metal spiral arm rotation directions are identical with structure, and are uniformly connected on spiral center.
Further, many described metal spiral arms follow Archimedes spiral gauge rule, and its polar equation is:
R=a θ；Distance between alternate arm is equal, is 2 π a, and wherein a is constant.
It is preferred that, the spacing between described adjacent artificial surface plasma resonant edge is 1-10mm.
Based on above-mentioned artificial surface plasmon coupling resonator waveguiding structure, the invention discloses a kind of straight wave guide,
It is characterized in that described artificial surface plasma shakes, chamber is arranged point-blank.
A kind of curved waveguide, it is characterised in that the described artificial surface plasma chamber that shakes is arranged on a curve.
A kind of orthogonal wave-guide without bending radius, it is characterised in that the described artificial surface plasma chamber that shakes is arranged in one
On right angle folding of the bar without bending radius.
A kind of composite waveguide, it is characterised in that by any number of straight wave guide, curved waveguide or the right angle without bending radius
Waveguide is formed by any order arrangement.
The present invention proposes a kind of waveguiding structure different from Traditional Man surface plasma waveguide and a variety of realization sides
Formula, the waveguide is the transmission that surface electromagnetic wave is realized by the weak coupling between surface plasma resonance chamber.Due to this
Surface plasma resonance chamber supports quadravalence mode of resonance and eight rank modes of resonance with quadruple rotational symmetry, so surface
Electromagnetic wave will not reflect and scatter in the curved waveguide without bending radius by being made up of the resonator, so as to realize
The perfect transmission of surface electromagnetic wave, a kind of new integrated platform is provided for following highly integrated plasma circuit.
Brief description of the drawings
The single copper sheet grid surface plasma resonant schematic diagrames of Fig. 1.
Fig. 2 (a) artificial surface plasmon coupling resonator straight wave guides.
Fig. 2 (b) forward directions excite what artificial surface plasmon coupling resonator straight wave guide during with broadside was supported
Quadravalence pattern, six rank patterns, the dispersion curve of eight rank patterns.
The quadravalence pattern that Fig. 2 (c) artificial surface plasmon coupling resonance cavity waveguides are supported, six rank patterns, eight ranks
The near field transmission spectral curve of pattern.
The quadravalence pattern that Fig. 2 (d)-(g) is supported for the coupled resonator straight wave guide, six rank patterns, the electricity of eight rank patterns
Field pattern.Wherein six rank patterns have two kinds of different mode of excitation, are that forward direction is excited and broadside respectively.
90 degree artificial surface plasmon coupling resonator curved waveguides of the Fig. 3 (a) without bending radius.
The artificial surface plasmon coupling resonator curved waveguide is supported when Fig. 3 (b) forward directions are excited with broadside
Quadravalence pattern, six rank patterns, the transmission spectral curve of eight rank patterns.
The quadravalence pattern that Fig. 3 (c-f) coupled resonator curved waveguides are supported, six rank patterns, the electric field of eight rank patterns
Distribution map.Wherein six rank patterns have two kinds of different mode of excitation, are that forward direction is excited and broadside respectively.
Fig. 4 is single metal helical structure surface plasma resonance chamber schematic diagram.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is further illustrated.But embodiments of the invention should not be construed as
It is the limitation to present invention protection content.
As shown in figure 1, the structure of the artificial surface plasma resonant for the present embodiment, the resonator supports that multipole is humorous
Shake pattern, such as quadrupole pattern, sextupole pattern, ends of the earth pattern etc..The described copper sheet grid being printed on medium bottom plate includes circle
Shape copper sheet and the circular grid being arranged in around copper sheet；Relation between each physical dimension of surface plasma resonance chamber is：2
π R=N*d, wherein R are resonator radius, and N is grid number, and d is the cycle between grid.Maximum between grid and grid
Gap width a=d/2.The physical dimension of the surface plasma resonance chamber can be adjusted, and the resonant frequency corresponding to it also can
Change with the change of physical dimension.The artificial surface plasma resonant is by the copper sheet grid structure that is printed on medium bottom plate
Into, the cycle d=1.256mm between copper sheet grid, gap width a=0.628mm, the length r=of grid between grid
9mm, the radius of whole copper dish is R=12mm.Copper thickness is 0.018mm, and the thickness of medium bottom plate is 0.254mm.
It is arranged in a row when the surface plasma resonance chamber, as shown in figure 1, adjacent surface plasma resonant is logical
The mutual weak coupling of evanescent wave is crossed, artificial surface plasma can jump to resonator adjacent thereto from a resonator, and often
The multipole resonance pattern that individual resonator is supported keeps constant, so as to realize the transmission of surface electromagnetic wave.Net is used in an experiment
Network vector analysis instrument as electromagnetic wave emission source and receiver, so as to study electromagnetic wave on the coupled resonance cavity waveguide
Transmission.
Shown in laboratory sample such as Fig. 2 (a) of artificial surface coupled resonance cavity waveguide proposed by the invention, seven resonators
It is arranged in a row, the spacing between adjacent resonators edge is that the spacing between 6mm, resonator center is 30mm, is calculated first
The quadrupole pattern that the coupled resonator is supported, sextupole pattern, shown in the dispersion curve of ends of the earth pattern, such as Fig. 2 (b), for four
Pole and ends of the earth pattern, because they have quadruple rotational symmetry, so being changed to laterally swash when exciting position to excite from forward direction
When hair, their dispersion curve will not change.But for not possessing the sextupole pattern of quadruple rotational symmetry, work as change
Its dispersion curve can be overturn when exciting position, but transmission spectrum will not change.With being connected on network vector analyzer
Two monopole antennas test forward direction and excite coupled resonance cavity waveguide during with broadside respectively as excitaton source and probe
Shown in transmission spectrum, such as Fig. 2 (c), for two kinds of different mode of excitation, three isolated transmission belts can be observed, respectively
Correspondence quadrupole pattern, sextupole pattern, ends of the earth pattern, and also the transmission belt and dispersion curve of the transmission spectrum are one-to-one.
In order to further appreciate that transmission of the surface electromagnetic wave on the coupled resonance cavity waveguide, using microwave near-field imager to the coupling
The electric field in three transmission belts that resonance cavity waveguide is supported is imaged, shown in such as Fig. 2 (d-g).Wherein Fig. 2 (d-e) is respectively
There is the quadravalence pattern of quadruple rotational symmetry and the distribution map of the electric field of eight rank patterns when being positive excite, Fig. 2 (f-g) is respectively
Forward direction excites the distribution map of the electric field with six rank patterns of broadside.It can be seen that six rank patterns excite in forward direction and
Coupled modes during broadside are different, thus cause the upset of dispersion curve, and for quadravalence pattern and eight
Rank pattern, due to rotation quadruple symmetry, when exciting position to excite from forward direction to be changed to broadside, their coupling side
Formula is the same, so dispersion curve will not change.Imaging of marching into the arena visually confirms this point.
The present invention have also been devised a kind of coupled resonator curved waveguide without bending radius, shown in such as Fig. 3 (a), seven couplings
Close the curved waveguide that resonator is arranged in one 90 degree.The transmission of the bending coupled resonance cavity waveguide is tested with same method
Spectrum, shown in such as Fig. 3 (b), either forward direction is excited or broadside, can observe three isolated transmission belts, it was demonstrated that
Surface wave can efficiently pass through the coupled resonance cavity waveguide without bending radius.Electric Field Distribution to the curved waveguide is carried out
Shown in imaging analysis, such as Fig. 3 (c-f).Wherein Fig. 3 (c-d) has the quadravalence of quadruple rotational symmetry when being positive excite respectively
The distribution map of the electric field of pattern and eight rank patterns, Fig. 3 (e-f) is the positive electric field point excited with six rank patterns of broadside respectively
Butut.It can be seen that quadravalence and eight rank patterns are due to quadruple rotational symmetry, so passing through 90 degree of bending waves
Coupled modes will not change when leading, so as to realize perfect transmission of the areflexia without scattering.And for six rank patterns, either just
To still broadside is excited, coupled modes of surface wave when by curved waveguide can all be inverted, even so, six ranks
Pattern still can efficiently pass through 90 degree of curved waveguides.
Fig. 4 is the structure of another artificial surface plasma resonant of the present invention, support magnetic dipole of the invention
The metal helical structure requirement of pattern includes a spiral center and Duo Gen metal spiral arms；It is preferred that many described metal spiral shells
Spiral arm rotation direction is identical with structure, and is uniformly connected on spiral center.Many described metal spiral arms follow Archimedes's spiral shell
Spin line rule, its polar equation is:R=a θ；Distance between alternate arm is equal, is 2 π a, and wherein a is constant.
In one particular embodiment of the present invention, the resonator is the support magnetic dipole that four metal spiral arms are constituted
The metal helical structure of pattern；The geometric parameter of metal helical structure is：The wide w=0.5 mm of metal spiral arm, around center rotation
Turn 1.5 circles, external diameter R=12.5mm, the distance between metal spiral arm is d=1.5mm.The distance between resonance cavity edge is 1-
10mm；Its implementation result is similar with copper sheet grid copper sheet grid.
Claims (9)
1. a kind of artificial surface plasmon coupling resonance cavity waveguide, it is characterised in that arranged by artificial surface plasma resonant
Row composition, described artificial surface plasma resonant is the copper sheet grid being printed on medium bottom plate or supports magnetic dipole
The metal helical structure of pattern.
2. artificial surface plasmon coupling resonance cavity waveguide according to claim 1, it is characterised in that described printing
Copper sheet grid on medium bottom plate includes circular copper sheet and around the grid being arranged in around copper sheet；The surface plasma is humorous
Relation between each physical dimension of the chamber that shakes is：2 π R=N*d, wherein R are resonator radius, and N is grid number, and d is between grid
Cycle.Maximum gap width a=d/2 between grid and grid.
3. artificial surface plasmon coupling resonance cavity waveguide according to claim 1, it is characterised in that described support
The metal helical structure of magnetic dipole pattern includes a spiral center and Duo Gen metal spiral arms；Many described metal spirals
Arm rotation direction is identical with structure, and is uniformly connected on spiral center.
4. artificial surface plasmon coupling resonance cavity waveguide according to claim 3, it is characterised in that described many
Metal spiral arm follows Archimedes spiral gauge rule, and its polar equation is:R=a θ；Distance between alternate arm is equal, is 2 π
A, wherein a are constant.
5. artificial surface plasmon coupling resonance cavity waveguide according to claim 1, it is characterised in that described is adjacent
Spacing between artificial surface plasma resonant edge is 1-10mm.
6. a kind of straight wave guide based on waveguide described in claim 5, it is characterised in that described artificial surface plasma shakes chamber
Arrangement is point-blank.
7. a kind of curved waveguide based on waveguide described in claim 5, it is characterised in that described artificial surface plasma shakes
Chamber is arranged on a curve.
8. a kind of orthogonal wave-guide without bending radius based on waveguide described in claim 5, it is characterised in that described labor statement
The surface plasma chamber that shakes is arranged on a right angle folding without bending radius.
9. a kind of composite waveguide based on waveguide described in claim 5, it is characterised in that by any number of straight wave guide, bending wave
Lead or the orthogonal wave-guide without bending radius is formed by any order arrangement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710257785.4A CN107039722A (en) | 2017-04-19 | 2017-04-19 | A kind of artificial surface plasmon coupling resonance cavity waveguide |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710257785.4A CN107039722A (en) | 2017-04-19 | 2017-04-19 | A kind of artificial surface plasmon coupling resonance cavity waveguide |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109509954A (en) * | 2019-01-04 | 2019-03-22 | 桂林电子科技大学 | A kind of artificial surface phasmon waveguide based on Fermat arm structure |
| CN111710967A (en) * | 2020-07-07 | 2020-09-25 | 江苏师范大学 | Vortex wave generator based on artificial surface plasmon and Archimedes spiral particles |
Citations (3)
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| JP2009150748A (en) * | 2007-12-20 | 2009-07-09 | Japan Aviation Electronics Industry Ltd | Surface plasmon sensor |
| CN104167346A (en) * | 2014-07-04 | 2014-11-26 | 南京航空航天大学 | Dual-frequency-band surface plasma resonant cavity |
| CN106486729A (en) * | 2016-09-29 | 2017-03-08 | 东南大学 | Compact closed-loop resonator based on artificial surface phasmon |
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2017
- 2017-04-19 CN CN201710257785.4A patent/CN107039722A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009150748A (en) * | 2007-12-20 | 2009-07-09 | Japan Aviation Electronics Industry Ltd | Surface plasmon sensor |
| CN104167346A (en) * | 2014-07-04 | 2014-11-26 | 南京航空航天大学 | Dual-frequency-band surface plasma resonant cavity |
| CN106486729A (en) * | 2016-09-29 | 2017-03-08 | 东南大学 | Compact closed-loop resonator based on artificial surface phasmon |
Non-Patent Citations (3)
| Title |
|---|
| GAO ZEHN等: "Frequency-selective propagation of localized spoof surface plasmons in a graded plasmonic resonator chain", 《SCIENTIFIC REPORTS》 * |
| SHOHEI MORIMOTO等: "Control of spoof localized surface plasmons by vortex of light in terahertz region", 《2016 41ST INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ)》 * |
| ZHEN LIAO等: "Electromagnetically induced transparency metamaterial based on spoof localized surface plasmons at terahertz frequencies", 《SCIENTIFIC REPORTS》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109509954A (en) * | 2019-01-04 | 2019-03-22 | 桂林电子科技大学 | A kind of artificial surface phasmon waveguide based on Fermat arm structure |
| CN111710967A (en) * | 2020-07-07 | 2020-09-25 | 江苏师范大学 | Vortex wave generator based on artificial surface plasmon and Archimedes spiral particles |
| CN111710967B (en) * | 2020-07-07 | 2022-05-17 | 江苏师范大学 | Vortex wave generator based on artificial surface plasmon and Archimedes spiral particles |
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Application publication date: 20170811 |
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