CN207216055U - A kind of device, straight wave guide and the curved waveguide of surface wave photonic crystal - Google Patents
A kind of device, straight wave guide and the curved waveguide of surface wave photonic crystal Download PDFInfo
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- CN207216055U CN207216055U CN201720630867.4U CN201720630867U CN207216055U CN 207216055 U CN207216055 U CN 207216055U CN 201720630867 U CN201720630867 U CN 201720630867U CN 207216055 U CN207216055 U CN 207216055U
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- 239000004038 photonic crystal Substances 0.000 title claims abstract description 51
- 239000002184 metal Substances 0.000 claims abstract description 66
- 229910052751 metal Inorganic materials 0.000 claims abstract description 66
- 238000005452 bending Methods 0.000 claims abstract description 12
- 230000000644 propagated effect Effects 0.000 claims abstract description 8
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- 239000000203 mixture Substances 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 38
- 239000013078 crystal Substances 0.000 abstract description 6
- 230000003287 optical effect Effects 0.000 abstract description 5
- 238000012546 transfer Methods 0.000 abstract description 3
- 206010003084 Areflexia Diseases 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 9
- 238000000411 transmission spectrum Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005090 crystal field Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 230000005404 monopole Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
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Abstract
The utility model discloses a kind of surface wave photonic crystal.It is made up of the columnar metal structure of two-dimensional and periodic arrangement on metal flat, metal column is equal with the distance between post, and the distance is less than the half of surface wave operation wavelength.Introduce defect fault location resonant frequency by reducing pillar height on described surface photon crystal be just in the forbidden band of surrounding photonic crystal can be with structured surface ripple photonic crystal function element.When the defects of introducing is line defect, surface electromagnetic wave can be constrained in line defect and be propagated along line defect.When introduce the defects of for 90 degree knuckles without bending radius when, surface electromagnetic wave during the curved waveguide by that can realize without scattering and unreflected high-efficiency transfer.In wideband and sub-wavelength restriction range, the utility model can realize that both areflexia or perfect without scattering transmitted surface electromagnetic wave when by curved waveguide without bending radius.This characteristic is not available for Traditional Man surface plasma waveguide and conventional photonic crystals waveguide.The utility model provides a kind of effective and feasible solution for the design and application of following extensive, sub-wavelength Terahertz and optical integrated circuit.
Description
Technical field
The utility model belongs to photonic crystal field, and in particular to a kind of novel surface ripple photonic crystal.
Background technology
Surface plasma excimer (surface plasmonpolaritons, abbreviation SPPs) is that one kind is present in optics
Mixed activation state of the wave band along the photon and electronics of metal and dielectric interface.Surface plasma excimer not only possesses breakthrough and spread out
The sub-wavelength of emitter-base bandgap grading limit can be propagated from constraint as electromagnetic wave in metal surface, hold promise as very much following height
The information carrier of integrated level, subminaturization Terahertz and optical integrated circuit system, it is the hot research problem of present forefront.
Natural metal surface plasma body is generally present in optical region, in low-frequency band, such as far infrared, Terahertz
And microwave band, the dielectric constant of metal is very big, and electromagnetic wave is difficult to permeate (skin depth is much smaller than wavelength), therefore surface etc.
Constraint of the gas ions in metal surface is very poor, it is impossible to is applied directly as a kind of carrier of information in low frequency sub-wavelength integrated device
In system.
In order to solve this problem, professor Pendry of Imperial College of Britain proposes artificial surface plasma
Concept, i.e., strengthen the infiltration of electromagnetic wave, such artificial metal table by increasing the hole of sub-wavelength dimensions in metal surface
Face not only can be by artificial surface plasma confinement in the range of sub-wavelength, and can be by changing metallic surface structures
Geometric parameter carrys out the characteristic of control surface electromagnetic wave.Because artificial surface plasma has sub-wavelength from constraint, height adjustable
Property and it is easy in excellent performances such as metal surface large-scale integrateds, before it has important application in low frequency IC system
Scape.
But the curved waveguide that traditional artificial surface plasma filled waveguide is zero by bending radius in transfer surface ripple
When can produce serious scattering and reflection, this not only can greatly reduce the efficiency of transmission of information, and can be in integrated circuit system
The crosstalk between signal is caused in system, is a great bottleneck for extensive, high density, sub-wavelength integrated circuit.Separately
On the one hand, can when by curved waveguide without bending radius it is understood that conventional photonic crystals are due to the constraint of forbidden photon band
Realize that the perfection almost without scattering is transmitted in some single-frequencies by resonance.But due to the forbidden photon band of conventional photonic crystals
It is to be formed based on Bragg diffraction, so the cycle of conventional photonic crystals is usually wavelength magnitude, so results in photon crystalline substance
The size of body is very big, is unfavorable for extensive, high-density optical circuit and integrates.
The content of the invention
The purpose of this utility model is overcome the deficiencies in the prior art, and the utility model provide firstly a kind of novel surface
Ripple photonic crystal.
Surface wave photonic crystal of the present utility model by two-dimensional and periodic arrangement on metal flat columnar metal structure structure
Into metal column is equal with the distance between post, and the distance is less than the half of surface wave operation wavelength.
Propagate on the surface that described surface wave is constrained on metal flat.
The distance between the metal column and post are less than the half of surface wave operation wavelength, optionally, the metal
The distance between post and post are less than 1/10th of surface wave operation wavelength.Alternative, the distance between the metal column and post
Less than 1st/20th of surface wave operation wavelength.
The invention also discloses it is several can the transmission of control surface ripples surface wave photonic crystal function element, its be
Obtained on surface photon crystal described in the utility model by introducing defect；The mode for introducing defect is reduction part metals post
Sub- height so that the resonant frequency of shorter metal pillar is just in the taboo of the longer molecular photonic crystal of metal column of surrounding
In band.Therefore, when the defects of introducing is line defect, electromagnetic wave can be constrained in line defect and be propagated along line defect.
For the mode of described introducing defect to reduce part metals post pillar height, the resonant frequency of the fault location is in surrounding
Within the forbidden band of the surface wave photonic crystal of higher metal post composition, the metal column after the reduction height is highly identical.
Based on the straight wave guide of the surface wave photonic crystal, by metal flat periodicity columnar metal structure form
Surface wave photonic crystal in introduce line defect form；Resonant frequency at the line defect is in higher metal post composition around
Surface wave photonic crystal forbidden band within, it is described introduce line defect mode for reduce straight line on columnar metal structure
Height, it is described reduce height after metal column it is highly identical.
Further, when introduce the defects of for 90 degree of curved waveguides without bending radius when, as long as shorter metal column
The resonant frequency of sub (defect) is in the forbidden band of the longer molecular photonic crystal of metal column of surrounding, and surface electromagnetic wave can
Realize when by 90 degree curved waveguides without bending radius without scattering and unreflected high efficiency of transmission.
Further, in the surface wave photonic crystal by introducing U-shaped defect structure two 90 without bending radius
Curved waveguide is spent, surface electromagnetic wave can be still realized in U-shaped defect curved waveguide without scattering and unreflected high efficiency of transmission.
The utility model proposes novel surface photonic crystal, the novel surface photonic crystal and traditional based on Prague
The photonic crystal of scattering is quite different.Because the surface photon crystal is to be based on surface wave forbidden photon band caused by particular resonance,
So the cycle of the novel surface photonic crystal is far smaller than wavelength, there is important answer for microwave and THz devices miniaturization
With.
The utility model can realize surface electromagnetic wave by the bending without bending radius in very wide frequency range
Both areflexia or the perfect transmission without scattering during waveguide.This is Traditional Man surface plasma waveguide and conventional photonic crystals institute
Do not possess.Design and application for following extensive, sub-wavelength Terahertz and optical integrated circuit provide one kind and effectively may be used
Capable solution.
Brief description of the drawings
Fig. 1 (a) surface wave photonic crystal schematic diagrames, the height of metal pillar is h, cycle d.Fig. 1 (b) surfaces glistening light of waves
The energy band diagram of sub- crystal；The near field transmission spectrum of Fig. 1 (c) surface wave photonic crystals；
Fig. 2 (a) surface wave photon crystal linear defect wave-guide schematic diagrames；The dispersion curve of Fig. 2 (b) linear defect wave-guides；Fig. 2
(c) the near field transmission spectrum of linear defect wave-guide；The near field distribution figure of Fig. 2 (d) linear defect wave-guides；
The U-shaped line defect curved waveguide schematic diagrames of Fig. 3 (a)；The U-shaped line defect curved waveguide near field transmission spectrums of Fig. 3 (b)；Fig. 3
(c) the near field distribution figure of U-shaped line defect curved waveguide.
Embodiment
The utility model is further described with reference to Figure of description.
Embodiment 1
Surface wave photonic crystal of the present utility model is made up of the metal column of metal surface periodic distribution, such as Fig. 1
(a) shown in, the height of metal pillar is H=5mm, and radius is r=1.25mm, and the cycle is that d=5 mm. use finite element eigen mode
Formula analytic approach can obtain the energy band diagram of the cycle metal structure, and as shown in Fig. 1 (b), the metal structure arrives in 12.6GHZ
A surface wave photonic crystal band between 27GHz be present, any surface is not supported in the surface wave photonic crystal band
Wave mode.The near field transmission spectrum of the experiment test metal structure.As shown in Fig. 1 (c), near field transmission spectrum in from 12.6GHz to
There is a transmission and falls into band in 27GHz, just corresponds to the surface wave photonic crystal band in energy band diagram, it was demonstrated that the metal surface
Structure is a kind of surface wave photonic crystal.
Embodiment 2
In the surface wave photonic crystal of embodiment 1 can by introduce the method for defect (reduce metal pillar height) come
The transmission of control surface ripple.As shown in Fig. 2 (a), the metal column of wherein one row is reduced to h=4.3mm from height H=5mm,
The resonant frequency of so shorter metal pillar is just in the forbidden band of the longer molecular photonic crystal of metal column of surrounding, institute
It can be constrained in line defect with electromagnetic wave and be propagated along line defect.The dispersion that the line defect has been calculated with same method is bent
Line, as shown in Fig. 2 (b), the dispersion curve is placed exactly in the forbidden band of surrounding photonic crystal.The experiment test linear defect wave-guide
Transmission spectrum, surface wave can pass through the perfect transmission of the linear defect wave-guide within 12.6GHz to 14.2GHz.In order to contrast,
The near field transmission spectrum in the presence of no defect is tested simultaneously, and as shown in Fig. 2 (c), surface wave photonic crystal band is from 12.6GHz
Start.The distribution map of the electric field of linear defect wave-guide is measured using microwave near-field imaging platform, as shown in Fig. 2 (d), surface wave is tight
Tight constraint is propagated in line defect and along line defect.
Embodiment 3
90 degree of curved waveguides are a kind of basic component in microwave and Terahertz integrated circuit.In the surface wave photon
Crystal is by introducing 90 degree curved waveguides of the U-shaped defect structure two without bending radius, as shown in Fig. 3 (a).Utilize two
Monopole antenna is as excitaton source and the probe test transfer rate of the U-bend waveguide, as shown in Fig. 3 (b), in 12.8GHz
Frequency range inner surface electromagnetic wave to 14.1GHz can be realized without the unreflected high efficiency of transmission of scattering.This and traditional artificial surface
Plasma filled waveguide is quite different.Traditional artificial surface plasma filled waveguide is when by 90 curved waveguide without bending radius
Serious scattering and reflection can be produced.
Claims (5)
1. a kind of device of surface wave photonic crystal, described surface wave photonic crystal is by two-dimensional and periodic arrangement on metal flat
Columnar metal structure form, metal column is equal with the distance between post, and the distance is less than two points of surface wave operation wavelength
One of, surface wave is propagated from the surface for constraining in metal flat, it is characterised in that the part gold of described surface wave photonic crystal
Category pillar height degree be less than the other metal columns of surrounding, and the resonant frequency at relatively low metal column is in the surface that around higher metal post forms
Within the forbidden band of ripple photonic crystal.
2. a kind of straight wave guide of surface wave photonic crystal, described surface wave photonic crystal are arranged by two-dimensional and periodic on metal flat
The columnar metal structure of row is formed, and metal column is equal with the distance between post, and the distance is less than the two of surface wave operation wavelength
/ mono-, surface wave is propagated from the surface for constraining in metal flat, it is characterised in that described surface wave photonic crystal one is straight
The height of columnar metal structure on line is less than the columnar metal structure height around the straight line, the resonant frequency at the straight line
It is in around within the forbidden band of the surface wave photonic crystal of higher metal post composition, the columnar metal structure height on the straight line
It is identical.
3. a kind of curved waveguide of surface wave photonic crystal, described surface wave photonic crystal is by two-dimensional and periodic on metal flat
The columnar metal structure of arrangement is formed, and metal column is equal with the distance between post, and the distance is less than surface wave operation wavelength
Half, surface wave are propagated from the surface for constraining in metal flat, it is characterised in that described surface wave photonic crystal bend
Columnar metal structure height on line is less than the columnar metal structure height around the sweep, the resonance frequency at the sweep
Rate is in around within the forbidden band of the surface wave photonic crystal of higher metal post composition, the columnar metal structure on the sweep
It is highly identical.
4. the curved waveguide of surface wave photonic crystal according to claim 3, it is characterised in that described sweep is without curved
90 degree of broken lines of bilge radius.
5. the curved waveguide of surface wave photonic crystal according to claim 3, it is characterised in that described sweep be comprising
The broken line of several 90 degree of knuckles without bending radius.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720630867.4U CN207216055U (en) | 2017-06-01 | 2017-06-01 | A kind of device, straight wave guide and the curved waveguide of surface wave photonic crystal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720630867.4U CN207216055U (en) | 2017-06-01 | 2017-06-01 | A kind of device, straight wave guide and the curved waveguide of surface wave photonic crystal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107315222A (en) * | 2017-06-01 | 2017-11-03 | 深圳凌波近场科技有限公司 | Surface wave photonic crystal |
| CN110221384A (en) * | 2019-06-17 | 2019-09-10 | 华中科技大学 | A kind of silicon substrate Meta Materials multimode curved waveguide and preparation method thereof |
-
2017
- 2017-06-01 CN CN201720630867.4U patent/CN207216055U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107315222A (en) * | 2017-06-01 | 2017-11-03 | 深圳凌波近场科技有限公司 | Surface wave photonic crystal |
| CN107315222B (en) * | 2017-06-01 | 2024-02-02 | 深圳凌波近场科技有限公司 | surface wave photonic crystal |
| CN110221384A (en) * | 2019-06-17 | 2019-09-10 | 华中科技大学 | A kind of silicon substrate Meta Materials multimode curved waveguide and preparation method thereof |
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