CN109193100A - A kind of super transparent resonance device of surface class electromagnetically induced of all dielectric - Google Patents
A kind of super transparent resonance device of surface class electromagnetically induced of all dielectric Download PDFInfo
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- CN109193100A CN109193100A CN201810876286.8A CN201810876286A CN109193100A CN 109193100 A CN109193100 A CN 109193100A CN 201810876286 A CN201810876286 A CN 201810876286A CN 109193100 A CN109193100 A CN 109193100A
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- 239000003989 dielectric material Substances 0.000 claims description 4
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Abstract
本发明公开了一种全介质超表面类电磁诱导透明谐振装置，包括基底和位于基底表面的呈二维周期性分布的类“S”形介质谐振单元，基底由介质材料制作，基底的介电常数大于0且小于等于5；类“S”形介质谐振单元由上横部、上纵部、中横部、下纵部、下横部依次连接为一体组成，每个连接处的转角都为90°，上横部、中横部、下横部相互平行，上纵部、下纵部相互平行；上横部和中横部的间距与中横部和下横部的间距不相等；类“S”形介质谐振单元的介电常数大于等于6。本发明不仅可以实现高透过率、高品质因子谐振，还可以提高群折射率，实现慢光效应。此外，本发明具有鲁棒性，即当谐振装置结构参数在一定范围内发生变化时，不会影响类EIT结果，对比其他类电磁诱导透明谐振装置，该优点将有利于器件加工和工程应用。
The invention discloses an all-dielectric metasurface-like electromagnetically induced transparent resonance device, comprising a substrate and a two-dimensional periodic distribution of "S"-like dielectric resonance units located on the surface of the substrate. The constant is greater than 0 and less than or equal to 5; the "S"-like dielectric resonant unit is composed of an upper transverse part, an upper longitudinal part, a middle transverse part, a lower longitudinal part, and a lower transverse part connected in sequence, and the corner of each connection is 90°, the upper transverse part, the middle transverse part and the lower transverse part are parallel to each other, and the upper longitudinal part and the lower longitudinal part are parallel to each other; the distance between the upper transverse part and the middle transverse part is not equal to the distance between the middle transverse part and the lower transverse part; The dielectric constant of the "S"-shaped dielectric resonance unit is greater than or equal to 6. The invention can not only realize high transmittance and high quality factor resonance, but also can improve the group refractive index and realize the slow light effect. In addition, the present invention is robust, that is, when the structural parameters of the resonator device change within a certain range, the EIT-like results will not be affected. Compared with other electromagnetically induced transparent resonator devices, this advantage will be beneficial to device processing and engineering applications.
Description
Technical field
The present invention relates to a kind of transparent (class EIT) resonance devices of the super surface class electromagnetically induced of all dielectric, belong to Meta Materials skill
Art field.
Background technique
Electromagnetically induced transparent (Electromagnetically induced transparency, EIT) is three energy of atom
Quantum Interference occurs in grade system, sharp transparent window is generated in wider absorption spectrum.Meta Materials class EIT effect
Refer to that interfering cancellation effect by mould bright in metamaterial structure and dark mould resonance realizes the transparent phenomenon of electromagnetically induced.It is close
Nian Lai, super surface class electromagnetically induced is transparent to become nano-photon field since it can produce the resonance of higher quality factor
Focus.The Meta Materials resonator of high-quality-factor can be applied to highly sensitive sensing, narrow-band filtering, electromagnetic wave modulation, light
The fields such as storage and slow-wave device.And high transmitance, group index can effectively slow down the speed that light is propagated in the medium,
The interaction of light and substance is greatly enhanced, the research and application of nonlinear optics can be effectively pushed.
Although the transparent effect of high-quality-factor class electromagnetically induced may be implemented in the current super surface of some all dielectrics, however,
When super surface resonance apparatus structure Parameters variation, often due to Ming Mo and dark mould resonance frequency to the sensitivity of Parameters variation not
Unanimously, relatively large detuning between the two is caused, class EIT effect is made to disappear.Therefore, the same of high transmittance high-quality-factor is being kept
When, realize that changing insensitive class EIT resonance device to structural parameters becomes those skilled in the art's urgent problem to be solved, this
It is beneficial to processing and the practical implementation of device.
Summary of the invention
The object of the present invention is to provide a kind of super transparent resonance devices of surface class electromagnetically induced of all dielectric, to overcome existing skill
All or part of defect of art.
To achieve the above object, the technical solution used in the present invention is: the super surface class electromagnetically induced of all dielectric of the present invention
Transparent resonance device includes substrate and the class serpentine dielectric resonance unit in two-dimensional and periodic distribution positioned at substrate surface, base
Bottom is made by dielectric material, and the dielectric constant of substrate is greater than 0 and is less than or equal to 5；Class serpentine dielectric resonance unit by upper transverse part,
Upper vertical portion, middle transverse part, lower vertical portion, inferior transverse part are sequentially connected and are integrated composition, and the corner of each junction is 90 °, upper transverse part,
Middle transverse part, inferior transverse part are parallel to each other, and upper vertical portion, lower vertical portion are parallel to each other；The spacing of upper transverse part and middle transverse part and middle transverse part and under
The spacing of transverse part is unequal；The dielectric constant of class serpentine dielectric resonance unit is more than or equal to 6.
Further, the corner between the left end of upper transverse part and the upper end in upper vertical portion is 90 °, the lower end in upper vertical portion and middle cross
Corner between the left end in portion is 90 °, and the corner between the right end of middle transverse part and the upper end in lower vertical portion is 90 °, under lower vertical portion
Corner between end and the right end of inferior transverse part is 90 °.
Further, the corner between the right end of upper transverse part and the upper end in upper vertical portion is 90 °, the lower end in upper vertical portion and middle cross
Corner between the right end in portion is 90 °, and the corner between the left end of middle transverse part and the upper end in lower vertical portion is 90 °, under lower vertical portion
Corner between end and the left end of inferior transverse part is 90 °
Further, the dielectric constant of substrate is greater than 0 and is less than or equal to 4.
Further, the upper transverse part of class serpentine dielectric resonance unit, upper vertical portion, middle transverse part, lower vertical portion, inferior transverse part medium
Item is cuboid medium strip.
Compared with prior art, the invention has the following advantages that
The super transparent resonance device of surface class electromagnetically induced of all dielectric of the present invention changes structural parameters insensitive.When resonance fills
When setting structural parameters and changing, if the length or width of transverse part rectangular strip or the height of dielectric resonance unit are in larger range
When interior variation, since sensitivity of the resonance frequency of Ming Mo and dark mould to Parameters variation is almost the same, class EIT resonance still can be with
In the presence of.And in electromagnetically induced transparent window, corresponding class EIT transmitance is positively retained at 97% or more, and resonance quality factor is big
In 6000, corresponding group index ngHigher than 10000.Other transparent resonance devices of class electromagnetically induced are compared, the robustness is advantageous
In device fabrication and practical implementation.In addition, the position for adjusting intermediate transverse part medium strip up and down along vertical part medium strip can phase
Adjust the size of resonance quality factor with answering, it is hereby achieved that the resonance device with different resonance quality factors, simple easy
Row.
Detailed description of the invention
Fig. 1 is a kind of a kind of structure of embodiment of the super transparent resonance device of surface class electromagnetically induced of all dielectric of the present invention
Schematic diagram；
Fig. 2 is the left view of Fig. 1；
Fig. 3 is the structural schematic diagram of the dielectric resonance unit in Fig. 1；
Fig. 4 is the structural schematic diagram of medium resonant element in another embodiment；
Fig. 5 is Transmittance spectrum curve graph of the resonance device shown in FIG. 1 at 1500~1700 nanometers；
Fig. 6 is the transmitance when transverse part medium strip length a of resonance device shown in FIG. 1 changes in a certain range
Curve graph.
Fig. 7 is the transmittance curve when medium strip height h of resonance device shown in FIG. 1 changes in a certain range
Figure.
Fig. 8 is the transmittance curve when medium strip width b of resonance device shown in FIG. 1 changes in a certain range
Figure.
Specific embodiment
Below in conjunction with attached drawing, present invention be described in more detail.
Figures 1 and 2 show that a kind of structure of the super transparent resonance device of surface class electromagnetically induced of all dielectric of the invention.Such as
Shown in Fig. 1 and Fig. 2, all dielectric super transparent resonance device of surface class electromagnetically induced include substrate 2 and positioned at 2 surface of substrate in two
Tie up the class serpentine dielectric resonance unit 1 of periodic distribution.As shown in figure 3, class serpentine dielectric resonance unit 1 by upper transverse part 11,
Upper vertical portion 12, middle transverse part 13, lower vertical portion 14, inferior transverse part 15 are sequentially connected and are integrated composition, and the corner of each junction is
90°.Upper transverse part 11, middle transverse part 13, inferior transverse part 15 are parallel to each other；Upper vertical portion 12, lower vertical portion 14 are parallel to each other.Upper transverse part 11 is in
The spacing g of transverse part 131With the spacing g of middle transverse part 13 and inferior transverse part 152It is unequal.Upper transverse part 11, upper vertical portion 12, middle transverse part 13, under
Vertical portion 14, inferior transverse part 15 are using cuboid medium strip as preferred embodiment.The electric constant for constructing the material of these medium strips is big
In equal to 6.
In class serpentine dielectric resonance unit 1 shown in Fig. 3, between the left end of upper transverse part 11 and the upper end in upper vertical portion 12
Corner is 90 °, and the corner between the lower end in upper vertical portion 12 and the left end of middle transverse part 13 is 90 °, and the right end of middle transverse part 13 is indulged with lower
Corner between the upper end in portion 14 is 90 °, and the corner between the lower end in lower vertical portion 14 and the right end of inferior transverse part 15 is 90 °, is made humorous
The whole shape for showing similar English alphabet " S " of vibration unit 1.Alternatively embodiment, class serpentine shown in Fig. 4
In dielectric resonance unit 1, the corner between the right end of upper transverse part 11 and the upper end in upper vertical portion 12 is 90 °, the lower end in upper vertical portion 12
Corner between the right end of middle transverse part 13 is 90 °, and the corner between the left end of middle transverse part 13 and the upper end in lower vertical portion 14 is
90 °, the corner between the lower end in lower vertical portion 14 and the left end of inferior transverse part 15 is 90 °, and resonant element 1 is made integrally to show similar English
The shape of the mirror image of text mother " S ".Both modes can realize the transparent resonance dress of class electromagnetically induced disclosed in this invention
It sets.Class serpentine dielectric resonance unit shown in Fig. 3 is used in the present embodiment.
As shown in Figure 1, class serpentine dielectric resonance unit 1 is periodic distribution, distribution period along X, Y both direction
It is P.Wherein, using the length direction of upper transverse part as X-direction, the length direction in the above vertical portion is Y direction, with class serpentine
Height (h) direction of dielectric resonance unit 1 is Z-direction.The length of upper transverse part 11 is a1, upper vertical portion 12 length be c1, middle cross
The length in portion 13 is a2, lower vertical portion 14 length be c2, inferior transverse part 15 length be a3。g1For upper transverse part 11 and middle transverse part 13 it
Between interval, g2For the interval between middle transverse part 13 and inferior transverse part 14.In the present embodiment, upper transverse part 11, middle transverse part 13 and lower cross
The length having the same of portion 15, i.e. a1=a2=a3=a；All medium strips width b having the same, therefore upper vertical portion 12
Length c1=g1+ 2b, the length c in lower vertical portion 142=g2+2b。
In the present embodiment, incident electromagnetic wave is Z-direction, and the electric field polarization direction of incident electromagnetic wave is Y direction.
In the present embodiment, substrate 2 is made by dielectric material, and the dielectric constant of substrate 2 is greater than 0 and is less than or equal to 5；As
The preferred embodiment of the present invention, the dielectric constant of substrate 2 are greater than 0 and are less than or equal to 4.
Technical effect of the invention is illustrated with specific embodiment below.The present invention is used into the super table of all dielectric of the present invention
The transparent resonance device of noodles electromagnetically induced works near 1500 nanometers of near infrared band, and electromagnetic wave is normal incidence, and line polarisation enters
It penetrates.The material of substrate 2 is quartz, dielectric constant 2.1316；The material of class S-shaped dielectric resonance unit 1 is silicon, and dielectric constant is
13.69。
1 cycle length along the x axis of class serpentine dielectric resonance unit and cycle length P along the y axis are 1000
Nanometer, incident electromagnetic wave are Z-direction, and the electric field polarization direction of incident electromagnetic wave is Y direction.Wherein, with upper transverse part 11
Length direction is X-direction, and the length direction in the above vertical portion 12 is Y direction, with the height of class serpentine dielectric resonance unit 1
Direction is Z-direction.The length a of transverse part medium strip is 600 nanometers, and dielectric resonance unit 1 is 780 in the total length c of Y direction
Nanometer, the width b of each medium strip is 120 nanometers, and height h is 200 nanometers.
Work as g1For 205 nanometers, g2When being 215 nanometers, the super surface class electromagnetically induced of all dielectric is obtained using Finite element arithmetic
Transmittance spectrum of the transparent resonance device in 1500~1700 nanometer ranges, curve are as shown in Figure 5.From fig. 5, it can be seen that complete
The super transparent resonance device of surface class electromagnetically induced of medium generates class EIT phenomenon, transparency window central wavelength in this frequency range
It is 1580 nanometers, for resonance peak amplitude up to 0.97, resonance quality factor q can be according to formula Q=f0/ Δ f is calculated (its
In, f0For the corresponding resonance frequency of resonance peaks, Δ f indicates that resonance peak reaches the one of maximum amplitude in electromagnetically induced transparent window
The width of corresponding resonance frequency when half).It is computed, quality factor is up to 6082 at this time.In addition, by adjusting along Y-axis side
The position of lower adjustment middle transverse part 13 upwards, thus adjusts the interval g between upper transverse part 11 and middle transverse part 132With middle transverse part 13 under
Interval g between transverse part 152Value, i.e., change Δ g (Δ g=| g1-g2|) size, different size of resonance product can be obtained
Prime factor.Such as when g=50 nanometers of Δ, Q=135；When g=5 nanometers of Δ, Q=20570；And when g=0 nanometers of Δ, do not exist
Meet upper transverse part and the spacing of middle transverse part and the spacing of middle transverse part and inferior transverse part is unequal, class EIT transparency window can disappear.
The value of the group index corresponding to the resonance peaks of electromagnetically induced transparent window can be according to formula ng=λ2/
(FWHM*4*h) (wherein, n is estimatedgIndicate group index, λ indicates the corresponding resonance wavelength of resonance peaks, and FWHM indicates electricity
Resonance peak reaches corresponding resonance wavelength width when the half of maximum amplitude in Magnetic guidance transparent window, and h indicates that class S-shaped medium is humorous
The height of vibration unit 1).It is computed, the corresponding group index of resonance peaks is up to 12482.
Work as g1For 205 nanometers, g2When being 215 nanometers, change the transparent resonance dress of the super surface class electromagnetically induced of all dielectric respectively
The different parameters for setting structure study it and change the influence to class EIT result.It keeps the other parameters of structure constant first, only changes
The size for becoming the length a of upper transverse part 11, middle transverse part 13 and inferior transverse part 15, shows the parameter as length a through result of finite element
When variation range is between 460~700 nanometers, since the sensitivity that the resonance frequency of Ming Mo and dark mould changes parameter a is basic
Unanimously, i.e., detuning very little between the two keeps the effect of class EIT after interaction.Fig. 6 show selection length a=respectively
At 460,600,700 nanometers, the transmittance curve figure that is obtained through FEM calculation.From fig. 6 it can be seen that with length a's
Increase, class EIT transmission peak wavelength will appear Red Shift Phenomena, but class EIT transparency window effect remains unchanged, transmitance be maintained at 97% with
On.
Similarly, it keeps structure other parameters constant, only changes the size of 1 height h of resonant element, through result of finite element
Show when the parameter variation range of height h is between 180~300 nanometers, since the resonance frequency of Ming Mo and dark mould is to parameter
The sensitivity of h variation is almost the same, i.e., detuning very little between the two keeps the effect of class EIT after interaction.Shown in Fig. 7
To choose height h=180 respectively, at 250,300 nanometers, the transmittance curve figure that is obtained through FEM calculation.As shown in Figure 7,
With the increase of 1 height h of resonant element, class EIT transmission peak wavelength will appear Red Shift Phenomena, but class EIT transparency window effect is kept not
Become, transmitance is still maintained at 97% or more.
Meanwhile we also calculate and are keeping structure other parameters constant, only change upper transverse part 11, middle transverse part 13, lower cross
Corresponding transmittance curve figure when portion 15, upper vertical portion 12 and the width b in lower vertical portion 14.Show to work as width through result of finite element
When spending the parameter variation range of b between 110~130 nanometers, width b is changed due to the resonance frequency of Ming Mo and dark mould spirit
Sensitivity is almost the same, i.e., detuning very little between the two, and the effect of class EIT is kept after interaction.Fig. 8 is shown to be chosen respectively
Width b=110, at 120,130 nanometers, the transmittance curve figure that is obtained through FEM calculation.It can be obtained by Fig. 8, with width b's
Increase, class EIT transmission peak wavelength will appear Red Shift Phenomena, but class EIT transparency window effect remains unchanged, transmitance be maintained at 97% with
On, the conclusion that conclusion obtains when changing with other parameters is consistent.
In conclusion the super transparent resonance device of surface class electromagnetically induced of all dielectric has robustness, that is, work as structural parameters
When changing in a big way, class EIT will not influence as a result, comparing other transparent resonance devices of class electromagnetically induced, which will
Be conducive to device fabrication and practical implementation.In addition, resonance device of the present invention can be used for the wave bands such as Terahertz, microwave.
Claims (5)
1. a kind of super transparent resonance device of surface class electromagnetically induced of all dielectric, it is characterised in that: including substrate and be located at substrate table
The class serpentine dielectric resonance unit in two-dimensional and periodic distribution in face, the substrate are made by dielectric material, and the dielectric of substrate is normal
Number is greater than 0 and is less than or equal to 5；The class serpentine dielectric resonance unit is by upper transverse part, upper vertical portion, middle transverse part, lower vertical portion, lower cross
Portion, which is sequentially connected, is integrated composition, and the corner of each junction is 90 °, and upper transverse part, middle transverse part, inferior transverse part are parallel to each other, on
Vertical portion, lower vertical portion are parallel to each other；The spacing of upper transverse part and middle transverse part and the spacing of middle transverse part and inferior transverse part are unequal；The class
The dielectric constant of serpentine dielectric resonance unit is more than or equal to 6.
2. the super transparent resonance device of surface class electromagnetically induced of all dielectric according to claim 1, it is characterised in that: on described
Corner between the left end of transverse part and the upper end in upper vertical portion is 90 °, the corner between the lower end in upper vertical portion and the left end of middle transverse part
Be 90 °, the corner between the right end of middle transverse part and the upper end in lower vertical portion is 90 °, the right end of the lower end in lower vertical portion and inferior transverse part it
Between corner be 90 °.
3. the super transparent resonance device of surface class electromagnetically induced of all dielectric according to claim 1, it is characterised in that: on described
Corner between the right end of transverse part and the upper end in upper vertical portion is 90 °, the corner between the lower end in upper vertical portion and the right end of middle transverse part
Be 90 °, the corner between the left end of middle transverse part and the upper end in lower vertical portion is 90 °, the left end of the lower end in lower vertical portion and inferior transverse part it
Between corner be 90 °.
4. the super transparent resonance device of surface class electromagnetically induced of all dielectric according to claim 1, it is characterised in that: substrate
Dielectric constant is greater than 0 and is less than or equal to 4.
5. the super transparent resonance device of surface class electromagnetically induced of all dielectric according to any one of claim 1-3, feature
Be: the upper transverse part of the class serpentine dielectric resonance unit, upper vertical portion, middle transverse part, lower vertical portion, inferior transverse part medium strip are length
Cube medium strip.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110416683A (en) * | 2019-07-12 | 2019-11-05 | 中国计量大学 | A high quality factor all-dielectric metamaterial ring dipole resonator device |
| CN110444898A (en) * | 2019-07-31 | 2019-11-12 | 天津大学 | A kind of broadband transmission enhancing device and control method |
| CN111650156A (en) * | 2020-06-15 | 2020-09-11 | 武汉理工大学 | High quality factor refractive index sensor based on all-dielectric metasurface and its fabrication method |
| CN112558209A (en) * | 2020-12-17 | 2021-03-26 | 桂林电子科技大学 | All-dielectric super-surface color filter based on H-shaped array |
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| CN107331970A (en) * | 2017-06-30 | 2017-11-07 | 东南大学 | A kind of super surface of two waveband high wave transmission rate |
| CN107579328A (en) * | 2017-09-26 | 2018-01-12 | 中国计量大学 | An E-shaped all-dielectric metasurface electromagnetically induced transparent resonator device |
| CN108172963A (en) * | 2017-12-26 | 2018-06-15 | 中国计量大学 | An all-dielectric metasurface electromagnetically induced transparent resonator device |
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| US20160156090A1 (en) * | 2011-09-20 | 2016-06-02 | Sandia Corporation | Flat optics enabled by dielectric metamaterials |
| CN107331970A (en) * | 2017-06-30 | 2017-11-07 | 东南大学 | A kind of super surface of two waveband high wave transmission rate |
| CN107579328A (en) * | 2017-09-26 | 2018-01-12 | 中国计量大学 | An E-shaped all-dielectric metasurface electromagnetically induced transparent resonator device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110416683A (en) * | 2019-07-12 | 2019-11-05 | 中国计量大学 | A high quality factor all-dielectric metamaterial ring dipole resonator device |
| CN110416683B (en) * | 2019-07-12 | 2020-12-11 | 中国计量大学 | A high quality factor all-dielectric metamaterial ring dipole resonator device |
| CN110444898A (en) * | 2019-07-31 | 2019-11-12 | 天津大学 | A kind of broadband transmission enhancing device and control method |
| CN111650156A (en) * | 2020-06-15 | 2020-09-11 | 武汉理工大学 | High quality factor refractive index sensor based on all-dielectric metasurface and its fabrication method |
| CN111650156B (en) * | 2020-06-15 | 2021-04-30 | 武汉理工大学 | High-quality-factor refractive index sensor based on all-dielectric super surface and manufacturing method thereof |
| CN112558209A (en) * | 2020-12-17 | 2021-03-26 | 桂林电子科技大学 | All-dielectric super-surface color filter based on H-shaped array |
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