CN207199807U - The two functions modulator on super surface is mixed based on metallic graphite carbon alkene - Google Patents
The two functions modulator on super surface is mixed based on metallic graphite carbon alkene Download PDFInfo
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- CN207199807U CN207199807U CN201721157760.9U CN201721157760U CN207199807U CN 207199807 U CN207199807 U CN 207199807U CN 201721157760 U CN201721157760 U CN 201721157760U CN 207199807 U CN207199807 U CN 207199807U
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Abstract
The utility model discloses a kind of two functions modulator that super surface is mixed based on metallic graphite carbon alkene, is made up of from bottom to top monocrystalline substrate layer, silicon oxide base layer, graphene-structured layer and metal band-shaped cable architecture layer；Graphene-structured layer includes the graphene unit of more than 2；Each graphene unit is made up of convex graphene ring, recessed graphene ring and 2 miniature gap openings；All graphene units arrange on silicon oxide base layer in regular matrix；Metal band-shaped cable architecture layer includes the metal band-shaped line of more than 2；Every metal band-shaped line is strip；The quantity of metal band-shaped line is identical with the columns of graphene-structured layer, and every metal band-shaped line Longitudinal extending is simultaneously covered on all graphene units of graphene-structured layer respective column；All metal band-shaped lines are on graphene-structured layer in arranged in parallel.The utility model can be changed the regulation and control for realizing both of which electromagnetic wave, that is, realized difunctional using the super surface of metallic graphite carbon alkene in the case where ensureing modulators modulate behavior pattern according to the relative direction of exciting field and array.
Description
Technical field
It the utility model is related to technical field of graphene, and in particular to a kind of that super surface is mixed based on metal-graphite alkene
Two functions modulator.
Background technology
THz wave plays an important roll in fields such as broadband connections, space exploration, medical diagnosis.As two-dimensional structure
The super surface of electromagnetism has the electromagnetic property that can not be directly obtained in nature, on the basis of theoretical gradual perfection, the super table of electromagnetism
Face is with a wide range of applications in terms of the functional device of terahertz wave band, such as THz modulators, polarizer.Existing work
Super surface of testifying has unique superiority in terms of ultra-thin, high-performance THz modulators are designed.However, this be based on proof gold
The modulator on the super surface of category must by change the structural parameters of modulator come or change the material property of tunable component come reality
Now to the modulation function of electromagnetic wave, realize that function is single.The large area of metal is used so that being operated in Terahertz frequency range simultaneously
Modulator is present such as the shortcomings of modulation rate is low, modulation depth is small.
Utility model content
It is to be solved in the utility model be it is existing based on simple metal surpass surface modulator exist function it is single, modulation speed
A kind of the problem of rate is low and modulation depth is small, there is provided two functions modulator that super surface is mixed based on metal-graphite alkene.
To solve the above problems, the utility model is achieved through the following technical solutions：
The two functions modulator on super surface is mixed based on metal-graphite alkene, by monocrystalline substrate layer, silicon oxide base layer
Super superficial layer composition is mixed with metal-graphite alkene；Silicon oxide base layer is stacked and placed on monocrystalline substrate layer, metal-graphite
Alkene mixes super superficial layer and is stacked and placed on silicon oxide base layer；Above-mentioned metal-graphite alkene mixes super surface by positioned at lower floor
Graphene-structured layer and the metal band-shaped cable architecture layer composition positioned at upper strata；Graphene-structured layer includes the graphene of more than 2
Unit；Each graphene unit includes 1 annular graphene ring, and 2 lateral symmetry settings are offered on the graphene ring
Above-mentioned graphene ring is divided into the convex graphene of 2 longitudinally asymmetric settings by miniature gap opening, this 2 miniature gap openings
Ring and recessed graphene ring；The structural parameters of each graphene unit are identical；All graphene units are in silica substrate
Arranged on layer in regular matrix；Metal band-shaped cable architecture layer includes the metal band-shaped line of more than 2；Every metal band-shaped line is
Strip；The quantity of metal band-shaped line is identical with the columns of graphene-structured layer, and every metal band-shaped line Longitudinal extending simultaneously covers
On all graphene units of graphene-structured layer respective column；All metal band-shaped lines are in parallel on graphene-structured layer
Row.
In such scheme, every metal band-shaped line is vertical with the lateral symmetry axis for covering the graphene unit on row.
In such scheme, every metal band-shaped line overlaps with covering the longitudinal asymmetric axis of the graphene unit on row.
In such scheme, the graphene ring of each graphene unit is square annular；Now, convex graphene ring is U
Shape, recessed graphene ring are positive U-shaped.
Above-mentioned two functions modulator when in use, still further comprises external bias DC voltage source；The external direct current is inclined
The one end for putting voltage source is connected with the metal band-shaped line of metal band-shaped cable architecture layer, and the other end is connected with monocrystalline substrate layer.
Compared with prior art, the utility model has following features：
1. for different frequency range, modulation work frequency can be adjusted by adjusting bias voltage and the physical dimension of graphene
Rate；
2. the use of monoblock graphene film is avoided to modulator modulation depth and modulation speed using the super surface of metal-graphite alkene
The influence of rate；
3. can be in the case where ensureing modulators modulate behavior pattern using the super surface of metal-graphite alkene, can be according to exciting field
The regulation and control of both of which electromagnetic wave are realized in relative direction change with array, that is, are realized difunctional.
Brief description of the drawings
Fig. 1 is a kind of dimensional structure diagram for the two functions modulator that super surface is mixed based on metal-graphite alkene.
Fig. 2 is Fig. 1 top view.
Fig. 3 is that single metal-graphene mixes super surface cell and graphene bias load mode schematic diagram.
Fig. 4 is that a kind of two functions modulator that super surface is mixed based on metal-graphite alkene emulates datagram, wherein Fig. 4 (a)
It is vertical with metal band-shaped line direction for exciting field direction of an electric field；Fig. 4 (b) is that exciting field direction of an electric field is put down with metal band-shaped line direction
OK.
Label in figure：1st, metal band-shaped line；2nd, graphene unit；2-1, convex graphene ring；2-2, recessed graphene ring；
2-3, miniature gap opening；3rd, silicon oxide base layer；4th, monocrystalline substrate layer.
Embodiment
For the purpose of this utility model, technical scheme and advantage is more clearly understood, below in conjunction with instantiation, and join
According to accompanying drawing, the utility model is further described.It should be noted that the direction term mentioned in example, such as " on ",
" under ", " transverse direction ", " longitudinal direction " etc., be only refer to the attached drawing direction.Therefore, the direction used is intended merely to explanation and is not used for limiting
The scope of protection of the utility model processed.
A kind of two functions modulator that super surface is mixed based on metal-graphite alkene, as Figure 1-3, by monocrystalline substrate
Layer 4, silicon oxide base layer 3 and metal-graphite alkene mix super superficial layer composition；Silicon oxide base layer 3 is stacked and placed on monocrystalline silicon
On substrate layer 4, metal-graphite alkene mixes super superficial layer and is stacked and placed on silicon oxide base layer 3.Silicon oxide base layer 3
Thickness have certain influence with resonant frequency to the bandwidth of modulator, it is usually no more than 300nm, and the parameter is by surface wave along hanging down
Directly determined in the attenuation coefficient of silica.
Above-mentioned metal-graphite alkene mixes super surface by the graphene-structured layer positioned at lower floor and positioned at the metal band-shaped of upper strata
The structure sheaf of line 1 forms.The graphene unit 2 of graphene-structured layer and the metal band-shaped line 1 of the structure sheaf of metal band-shaped line 1 are made jointly
With providing resonance characteristic for the whole super surface of metal-graphite alkene.
Graphene-structured layer includes the graphene unit 2 of more than 2.Each graphene unit 2 is by convex graphene ring 2-
1st, recessed graphene ring 2-2 and 2 miniature gap opening 2-3 compositions.That is, each graphene unit 2 includes 1 completely
The graphene ring of annular, the miniature gap opening 2-3 of 2 lateral symmetry settings, this 2 miniature seams are offered on the graphene ring
Graphene ring is divided into the convex graphene ring 2-1 and recessed graphene ring 2-2 of 2 longitudinally asymmetric settings by gap opening 2-3.Often
Individual graphene unit 2 is simultaneously on longitudinal asymmetric axis and lateral symmetry axisymmetrical, wherein 2 miniature gap opening 2-3
Axis overlaps, and forms the lateral symmetry axis of graphene unit 2, convex graphene ring 2-1 symmetrical center line and recessed stone
Black alkene ring 2-2 symmetrical center line overlaps, and forms the longitudinal asymmetric axis of graphene unit 2.Each graphene unit 2 can be with
Generally annular, square annular or polygonal annular, in the utility model preferred embodiment, the stone of each graphene unit 2
Black alkene ring is square annular；Now, convex graphene ring 2-1 is inverted U-shaped that recessed graphene ring 2-2 is positive U-shaped.Each graphite
The structural parameters of alkene unit 2 are identical.The size of graphene unit 2 will influence on resonance band.All graphene lists
Member 2 arranges on silicon oxide base layer 3 in regular matrix.Graphene-structured layer carries out the cycle on silicon oxide base layer 3
Property matrix arrangement when, its graphite that laterally 2 numbers of graphene unit of (i.e. line direction) arrangement and longitudinal (i.e. column direction) arrange
2 numbers of alkene unit can it is equal can also be unequal.The number for the graphene unit 2 that graphene-structured layer is included is more, adjusts
The performance of device processed is more stable.In the utility model preferred embodiment, each row of graphene-structured layer are 8 graphene lists
Member 2, it is 8 graphene units 2 per a line, whole graphene-structured layer is made up of 64 graphene units 2.
The metal band-shaped structure sheaf of line 1 includes the metal band-shaped line 1 of more than 2.Every metal band-shaped line 1 is strip.
The width of metal band-shaped line 1 can influence the resonant frequency on the super surface of metal-graphite alkene, and modulator work can be preferably made by parameter
Make in required frequency range.The quantity of metal band-shaped line 1 is identical with the columns of graphene-structured layer, and every metal band-shaped longitudinal direction of line 1 is prolonged
Stretch and be covered on all graphene units 2 of graphene-structured layer respective column, and be consequently formed resonance structure.Metal band-shaped line
12 miniature gap opening 2-3 with covering the graphene unit 2 on row axis line direction is vertical.Every metal tape
Shape line 1 is covered in the longitudinal asymmetric axis of all graphene units 2 in graphene-structured layer respective column.It is all metal band-shaped
Line 1 is on graphene-structured layer in arranged in parallel.
In addition, the utility model still further comprises external bias DC voltage source, the external bias DC voltage source
One end is connected with the metal band-shaped line 1 of the metal band-shaped structure sheaf of line 1, and the other end is connected with monocrystalline substrate layer 4, passes through metal tape
Shape line 1 is that graphene unit 2 provides bias voltage.All metal band-shaped lines 1 can share 1 external bias DC voltage source,
Several metal band-shaped lines 1 can also be allowed to share 1 external bias DC voltage source, it might even be possible to for each metal band-shaped line
1 is respectively configured 1 external bias DC voltage source.Added by being mixed in metal-graphite alkene between super surface and monocrystalline substrate
Electrode is carried, to realize the control biased to graphene in whole array, and then graphene fermi level is controlled, realizes graphene
Switching between dielectric property and metallic character.
The two functions modulator that super surface is mixed based on metal-graphite alkene, its is difunctional be in particular in designed by
Modulator can not only be realized according to the structural parameters of itself and need the electromagnetic wave modulation of frequency range, can also be according to exciting field pole
Change characteristic and be operated in different frequency range.
It is generally acknowledged that graphene can be counted as electrical conductivity surface, its electrical conductivity can obtain according to Kubo formula, by band
Electrical conductivity and interband electrical conductivity are formed:
σs=σintra(ω,uc,Γ,T)+σinter(ω,uc,Γ,T)
Wherein, e,kBIt is the quantity of electric charge respectively, Planck's constant, Boltzmann's constant, T is room temperature 300K. uc(EF) it is stone
Black alkene fermi level.Γ is scattered power, whereinτ is the electron relaxation time.
For relatively low Terahertz frequency range, as shown from the above formula, the surface conductivity for influenceing graphene is mainly σintra
(ω,uc, Γ, T), and electrical conductivity real part keeps relative stability, imaginary part influenceed relative to real part it is smaller, real part and imaginary part with
uc(EF) increase and increase.In consideration of it, in Terahertz frequency range low side, the fermi level E of graphene-structured 2F(that is, graphene
Chemical potential) it is biased voltage VgControl, the electrical conductivity for being eventually exhibited as graphene are biased voltage control, that is to say, that by changing
Become the bias voltage of graphene-structured 2, the electromagnetic property of graphene shows as eka-gold attribute or class medium.
As the chemical potential E of grapheneFDuring=1eV, the conductance of graphene unit 2 is high, metallic character is shown as, with metal
Strip line 1 collectively forms resonant element；As the chemical potential E of grapheneFDuring=0eV, the conductance of graphene unit 2 is low, performance
For the characteristic of medium, now only bonding jumper produces response to electromagnetic wave, similar to optical grating construction, it will through electric field polarization side
To the electromagnetic wave vertical with bonding jumper, suppress the electromagnetic wave parallel with bonding jumper with E field polarization direction.Therefore, when chemical formula exists
0eV and 1eV changes, graphene are changed from dielectric property to metallic character, so as to change the resonance characteristic of super media units, finally
Realize the modulation function to electromagnetic wave.It is by convex graphene ring 2-1 and recessed graphene ring 2-2 in view of graphene unit 2
The symmetrical structure not connected mutually formed, its loading biased can be completed by metal band-shaped line 1.So metal band-shaped line 1
Resonance structure is not only collectively formed with graphene unit 2, while is alternatively graphene unit 2 and serves as required metal electrode.
In the utility model preferred simulation case：The two functions modulator work on super surface is mixed based on metal-graphite alkene
In Terahertz frequency range, it is made up of identical cellular construction periodic arrangement.Each unit is square in length of side P=60um,
Metal band-shaped line 1 is the copper foil that width is W=8um, silicon dioxide liner bottom 4 use relative dielectric constant for 3.9 SiO2, it is single
Crystalline silicon substrate layer 4 use relative dielectric constant for 11.9 Si.Graphene unit 2 is overall in the square ring that the length of side is L=50um
Shape, miniature gap opening 2-3 width g=3um.The modulator of the utility model design can be according to the electric field side of exciting field
To its mode of operation of determination：When the direction of an electric field of exciting field it is parallel with metal band-shaped line 1 with it is vertical when, modulator is operated in respectively
0.4THz and 1.0THz, modulation depth are respectively 89% and 88%, are realized difunctional.Simulation result such as Fig. 4 (a) Fig. 4 (b)
It is shown, wherein solid line represent exciting field direction of an electric field it is parallel with metal band-shaped line 1, dotted line represent exciting field direction of an electric field and
Metal band-shaped line 1 is vertical.
It should be noted that although embodiment described in the utility model is illustrative above, but this is not to this
The limitation of utility model, therefore the utility model is not limited in above-mentioned embodiment.The utility model is not being departed from
In the case of principle, other embodiment that every those skilled in the art obtain under enlightenment of the present utility model is accordingly to be regarded as
Within protection of the present utility model.
Claims (5)
1. the two functions modulator on super surface is mixed based on metal-graphite alkene, it is characterised in that：By monocrystalline substrate layer (4), two
Aoxidize silicon substrate layer (3) and metal-graphite alkene mixes super superficial layer composition；Silicon oxide base layer (3) is stacked and placed on monocrystalline silicon lining
On bottom (4), metal-graphite alkene mixes super superficial layer and is stacked and placed on silicon oxide base layer (3)；
Above-mentioned metal-graphite alkene mixes super surface by the graphene-structured layer positioned at lower floor and the metal band-shaped line positioned at upper strata
(1) structure sheaf forms；
Graphene-structured layer includes the graphene unit (2) of more than 2；Each graphene unit (2) includes 1 complete annular
Graphene ring, the miniature gap opening (2-3) of 2 lateral symmetry settings is offered on the graphene ring, this 2 miniature gaps are opened
The graphene ring of above-mentioned complete annular is divided into the convex graphene ring (2-1) of 2 longitudinally asymmetric settings and recessed by mouthful (2-3)
Graphene ring (2-2)；The structural parameters of each graphene unit (2) are identical；All graphene units (2) are in titanium dioxide silicon substrate
Arranged on bottom (3) in regular matrix；
Metal band-shaped line (1) structure sheaf includes the metal band-shaped line (1) of more than 2；Every metal band-shaped line (1) is strip
Shape；The quantity of metal band-shaped line (1) is identical with the columns of graphene-structured layer, and every metal band-shaped line (1) Longitudinal extending is simultaneously covered
Cover on all graphene units (2) of graphene-structured layer respective column；All metal band-shaped lines (1) are on graphene-structured layer
In arranged in parallel.
2. the two functions modulator according to claim 1 that super surface is mixed based on metal-graphite alkene, it is characterised in that：
Every metal band-shaped line (1) is vertical with the lateral symmetry axis for covering the graphene unit (2) on row.
3. the two functions modulator according to claim 1 or 2 that super surface is mixed based on metal-graphite alkene, its feature are existed
In：Every metal band-shaped line (1) overlaps with covering the longitudinal asymmetric axis of the graphene unit (2) on row.
4. the two functions modulator according to claim 1 that super surface is mixed based on metal-graphite alkene, it is characterised in that：
The graphene ring of each graphene unit (2) is square annular；Now, convex graphene ring (2-1) is inverted U-shaped, recessed graphite
Alkene ring (2-2) is positive U-shaped.
5. the two functions modulator according to claim 1 that super surface is mixed based on metal-graphite alkene, it is characterised in that：
Still further comprise external bias DC voltage source；One end of the external bias DC voltage source and metal band-shaped line (1) structure
The metal band-shaped line (1) of layer is connected, and the other end is connected with monocrystalline substrate layer (4).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107248608A (en) * | 2017-06-30 | 2017-10-13 | 西安电子科技大学 | Double-deck microstrip multi-path power divider based on graphene film |
| CN107453012A (en) * | 2017-09-11 | 2017-12-08 | 桂林电子科技大学 | The two functions modulator on super surface is mixed based on metallic graphite carbon alkene |
| CN111682319A (en) * | 2020-04-14 | 2020-09-18 | 中国计量大学 | Design method of novel broadband tunable coding super surface based on metal-graphene |
| CN113451719A (en) * | 2021-03-22 | 2021-09-28 | 电子科技大学 | Design of dual electrical regulation super-surface switch filter |
-
2017
- 2017-09-11 CN CN201721157760.9U patent/CN207199807U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107248608A (en) * | 2017-06-30 | 2017-10-13 | 西安电子科技大学 | Double-deck microstrip multi-path power divider based on graphene film |
| CN107248608B (en) * | 2017-06-30 | 2019-06-21 | 西安电子科技大学 | The double-deck microstrip multi-path power divider based on graphene film |
| CN107453012A (en) * | 2017-09-11 | 2017-12-08 | 桂林电子科技大学 | The two functions modulator on super surface is mixed based on metallic graphite carbon alkene |
| CN107453012B (en) * | 2017-09-11 | 2022-02-22 | 桂林电子科技大学 | Dual-function modulator based on metal-graphene mixed super surface |
| CN111682319A (en) * | 2020-04-14 | 2020-09-18 | 中国计量大学 | Design method of novel broadband tunable coding super surface based on metal-graphene |
| CN113451719A (en) * | 2021-03-22 | 2021-09-28 | 电子科技大学 | Design of dual electrical regulation super-surface switch filter |
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