CN105572922A - Right-angle output double-way inverted optical clock signal generator with photonic crystal T-type waveguide - Google Patents
Right-angle output double-way inverted optical clock signal generator with photonic crystal T-type waveguide Download PDFInfo
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- 230000003287 optical effect Effects 0.000 title claims abstract description 63
- 239000004038 photonic crystal Substances 0.000 title claims abstract description 55
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 18
- 239000010703 silicon Substances 0.000 claims abstract description 18
- 230000002950 deficient Effects 0.000 claims description 29
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/122—Basic optical elements, e.g. light-guiding paths
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/122—Basic optical elements, e.g. light-guiding paths
- G02B6/1225—Basic optical elements, e.g. light-guiding paths comprising photonic band-gap structures or photonic lattices
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/09—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect
- G02F1/095—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect in an optical waveguide structure
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/015—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on semiconductor elements having potential barriers, e.g. having a PN or PIN junction
- G02F1/0151—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on semiconductor elements having potential barriers, e.g. having a PN or PIN junction modulating the refractive index
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2202/00—Materials and properties
- G02F2202/32—Photonic crystals
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Abstract
The invention discloses a right-angle output double-way inverted optical clock signal generator with a photonic crystal T-type waveguide. The optical clock signal generator comprises the photonic crystal T-type waveguide with a TE forbidden band and further comprises one input end (1), two output ends (2 and 3), background silicon dielectric cylinders (4), isosceles right triangle defect dielectric cylinders (5), a defect dielectric cylinder (6), an electromagnet (7) providing a bias magnetic field and a rectangular wave current source (9). The left end of the photonic crystal T-type waveguide is the input end (1), the output ends (2 and 3) are located at the right end and the upper end of the photonic crystal T-type waveguide respectively, the defect dielectric cylinder (6) is located in the center intersection position of the T-type waveguide, and the four isosceles right triangle defect dielectric cylinders (5) are located at the four intersecting corners of the T-type waveguide respectively; TE carrier wave light is input through the port (1) of the photonic crystal T-type waveguide, and two ways of optical clock signals opposite in phase are output from the ports (2 and 3). The TE light double-way inverted optical clock signal generator can be obtained efficiently.
Description
Technical field
The present invention relates to the anti-phase optical clock signal generator of two-way, particularly relate to a kind of photonic crystal T-shaped waveguide right angle and export the anti-phase optical clock signal generator of two-way.
Background technology
Traditional dutycycle is adjustable and each other logic NOT two-way optical clock signal generator application be geometric optical theory, therefore volume is all larger, cannot be used for light path integrated in.The combination of magneto-optic memory technique and New-type photon crystal proposes many photonic devices, its topmost character is the gyromagnet nonreciprocity that electromagnetic wave shows under bias magnetic field, make magnetic photonic crystal not only have optically-active characteristic, also have larger transmission bandwidth and the propagation efficiency of Geng Gao.Small device can be made based on photonic crystal, comprise the anti-phase optical clock signal generator of two-way.The general inlead defect in the photonic crystal of photon crystal wave-guide light path of the anti-phase optical clock signal generator of two-way builds.Optical clock is the vitals of optical communication, optical logic device, optical information processing system, optical computing, and have widespread use and be worth, compact optical clock generator is the vitals of integrated wide sharp chip.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, provide a kind of structural volume little, efficient short distance, be convenient to integrated photonic crystal T-shaped waveguide right angle and export the anti-phase optical clock signal generator of two-way.
Object of the present invention is achieved by following technical proposals.
Photonic crystal of the present invention T-shaped waveguide right angle exports the anti-phase optical clock signal generator of two-way, comprises the T-shaped waveguide of photonic crystal that has TE forbidden band; Described generator also comprises an input end 1, two output terminals 2 and 3, background silicon dielectric posts 4, isosceles right triangle defective media post 5 and defective media post 6, and this generator also comprises electromagnet 7 and the square wave current source 9 that provides bias magnetic field; The left end of the T-shaped waveguide of described photonic crystal is input end 1; Described output terminal 2 and output terminal 3 lay respectively at right-hand member and the upper end of the T-shaped waveguide of photonic crystal; Described defective media post 6 is positioned at T-shaped waveguide core infall; Described 4 isosceles right triangle defective media posts 5 lay respectively at four corners that T-shaped waveguide intersects; Described photon crystal wave-guide inputs TE light by port one, then exports the contrary optical clock signal of two-way phase place from port 2 and port 3.
Described generator comprises wire 8 further, and one end of described electromagnet 7 is connected by wire 8 one end with square wave current source 9; Mechanical periodicity is done in time in the direction of the bias magnetic field that described electromagnet 7 provides.
Described photonic crystal is Two dimensional square lattice photonic crystal.
Described photonic crystal is made up of high refractive index medium material and low-index material, and described high refractive index medium material is the medium that silicon or refractive index are greater than 2; Described low refractive index dielectric is the medium that air or refractive index are less than 1.4.
Described T-shaped waveguide is the structure after removing a middle horizontally-arranged and middle vertical setting of types dielectric posts in photonic crystal.
4 background media posts 4 of described T-shaped waveguide intersection corner delete an angle respectively to form isosceles right triangle defective media post, and this isosceles right triangle defective media post 5 is triangle column type.
The shape of described background silicon dielectric posts 4 is square.
Described square silicon dielectric posts is rotated counterclockwise 41 degree with dielectric posts axis z-axis direction.
Described defective media post 6 is ferrite square column, and its shape is square, and the magnetic permeability of described ferrite square column is anisotropy, and is subject to the control of bias magnetic field, and bias magnetic field direction is along the axis direction of ferrite square column.
Described port 2 and port 3 layout at a right angle.
The present invention compared with prior art has following advantage:
(1) structural volume is little, and time response is fast, and light transmissioning efficiency is high, is applicable to extensive light path integrated;
(2) can realize to Short-range efficient the function of the anti-phase optical clock signal generator of TE light two-way, be convenient to integrated, there is great practical value;
(3) applying photonic crystal can the characteristic of equal proportion convergent-divergent, is changed the method for grating constant, can realize the generation of different wave length two-way inverting clock signal by equal proportion;
(4) high-contrast, high-isolation, also has wider operating wavelength range simultaneously, can allow the pulse of certain spectrum width, or Gauss light, or the light work of different wave length, or the light of multiple wavelength works simultaneously, has Practical significance.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation that photonic crystal of the present invention T-shaped waveguide right angle exports two-way anti-phase optical clock signal generator.
In figure: input end 1 output terminal 2 output terminal 3 background silicon dielectric posts 4 isosceles right triangle defective media post 5 defective media post 6
Fig. 2 is that photonic crystal of the present invention T-shaped waveguide right angle exports the another kind of structural representation of the anti-phase optical clock signal generator of two-way.
In figure: magnet coil 7 wire 8 square wave current source 9
Fig. 3 is the structural parameters distribution plan that photonic crystal of the present invention T-shaped waveguide right angle exports the anti-phase optical clock signal generator of two-way.
Fig. 4 is the optical clock signal oscillogram that photonic crystal of the present invention T-shaped waveguide right angle exports the anti-phase optical clock signal generator of two-way.
Fig. 5 is the logic contrast figure that in embodiment 1, photonic crystal T-shaped waveguide right angle exports two-way anti-phase optical clock signal generator forbidden band frequency.
Fig. 6 is the logic contrast figure that in embodiment 2, photonic crystal T-shaped waveguide right angle exports two-way anti-phase optical clock signal generator forbidden band frequency.
Fig. 7 is the logic contrast figure that in embodiment 3, photonic crystal T-shaped waveguide right angle exports two-way anti-phase optical clock signal generator forbidden band frequency.
Fig. 8 is the optical field distribution schematic diagram that photonic crystal of the present invention T-shaped waveguide right angle exports the anti-phase optical clock signal generator of two-way.
Embodiment
As shown in Figure 1, photonic crystal of the present invention T-shaped waveguide right angle exports the structural representation (deleting biasing circuit and bias coil) of the anti-phase optical clock signal generator of two-way, comprise the T-shaped waveguide of photonic crystal that has TE forbidden band, this generator also comprises an input end 1, two output terminals 2 and 3, background silicon dielectric posts 4, isosceles right triangle defective media post 5 and defective media post 6; This device initialize signal light is incident from left port one, port 2 output light-wave, and port 3 isolates light wave; Port 2 and port 3 lay respectively at right-hand member and the upper end of the T-shaped waveguide of photonic crystal, this port 2 and port 3 layout at a right angle; Photon crystal wave-guide inputs TE light by port one, then exports the contrary optical clock signal of two-way phase place from port 2,3.Background silicon dielectric posts 4, its shape is square, the vertical paper of optical axis direction is outside, and isosceles right triangle defective media post 5 shape is, T-shaped waveguide intersects after an angle deleted by the background media post 4 of corner and formed, for triangle column type, 4 isosceles right triangle defective media posts 5 lay respectively at four corners of T-shaped waveguide intersection, and optical axis direction is identical with background media post, and the shape of defective media post 6 is square, it is positioned at T-shaped waveguide core infall, and the vertical paper of optical axis direction is outside.Defective media post 6 is ferrite square column) magnetic permeability of this ferrite square column is anisotropy, and by the control of bias magnetic field, bias magnetic field direction is along the axis direction of ferrite square column.As shown in Figure 2, photonic crystal of the present invention T-shaped waveguide right angle exports the structural representation (containing biasing circuit and bias coil) of the anti-phase optical clock signal generator of body two-way, generator comprises electromagnet 7 (magnet coil) and the square wave current source 9 that provides bias magnetic field, this generator also comprises wire (8), and one end of electromagnet 7 is connected by wire 8 one end with square wave current source 9; The other end of electromagnet 7 is connected with the other end in square wave current source 9, and mechanical periodicity is done in time in the direction of the bias magnetic field that this electromagnet 7 provides; The structural representation of generator of the present invention adopts Descartes's rectangular coordinate system: x-axis positive dirction be level to the right; Y-axis positive dirction be in paper straight up; Z-axis positive dirction is outside perpendicular to paper.
As shown in Figure 3, the correlation parameter of this device is:
D
1=a (grating constant)
D
2=0.3a (the square silicon post length of side)
D
3=0.2817a (the square defect post length of side)
D
4=0.3a (isosceles right triangle defect post waist is long)
D
5=1.2997a (isosceles right triangle defect post hypotenuse is to the distance at square defect post center)
D
6=1.577a (the wide length of waveguide)
Photonic crystal of the present invention is tetragonal, grating constant is a, the dielectric posts length of side is 0.3a, when photonic crystal square silicon dielectric posts blank medium mast axis direction (z-axis) is rotated counterclockwise 41 degree, plane wave expansion method is adopted to obtain TE forbidden band structure in photonic crystal, photon TE forbidden band is 0.3150 to 0.4548 (ω a/2 π c), the light wave of any frequency in the middle of it will be limited in the waveguide, after tetragonal dielectric posts blank medium mast axis direction (z-axis) is rotated counterclockwise 41 degree, obtain larger wider forbidden band scope.
Silicon Medium Wave Guide used herein needs delete a line and a row dielectric posts and form guided wave waveguide.Planar waveguide is perpendicular to the axis of the dielectric posts in photonic crystal.By introducing a ferrite square column (square defective media post 6) at above-mentioned T-shaped waveguide core infall, its length of side is 0.28a, and 4 isosceles right triangle defective media post 5 inclined edge surfaces divide the distance being clipped to ferrite column axis (square defective media post 6) to be 1.2997a.The optical axis of ferrite square column is consistent with the optical axis direction of background media post.
Principles and methods of the present invention is explained mainly for magnet-optical medium.Ferrite is a kind of material of magnetic anisotropy, and ferritic magnetic anisotropy is induced by external dc bias magnetic place.This magnetic field makes the magnetic dipole in ferrite follow the arrangement of same direction, thus produces the magnetic dipole moment of synthesis, and magnetic dipole is taken exercises under the frequency controlled by biased magnetic field strength.
The interaction with additional microwave signal can be controlled by adjustment biased magnetic field strength, thus realize the anti-phase optical clock signal generator of photonic crystal T-shaped waveguide right angle output two-way.Under the effect of bias magnetic field, ferritic permeability tensor shows as asymmetry, and wherein ferrite tensor permeability [μ] is:
Relevant parameter in the matrix element of permeability tensor is provided by following formula:
ω
0＝μ
0γH
0(2)
ω
m＝μ
0γM
s(3)
ω＝2πf(4)
Wherein, μ
0for the magnetic permeability in vacuum, γ is gyromagnetic ratio, H
0for externally-applied magnetic field, M
sfor saturation magnetization, be frequency of operation, p=k/ μ is normalization magnetic frequency, also be separation factor, parameter μ and k determines different Ferrite Material, and the material with the permeability tensor of this form is called gyromagnetism, assuming that the direction be biased is contrary, then H
0and M
sby reindexing, so sense of rotation also can be contrary.
For choosing of grating constant and operation wavelength, can determine in the following ways.Pass through formula
Wherein with tetragonal silicon structure in the present invention normalization forbidden band frequency range
F
norm=0.3150 ~ 0.4548 (8) calculates corresponding forbidden band wavelength coverage is:
λ＝2.1987a～3.1746a(9)
As can be seen here when not considering dispersion or material dispersion variation is very little, the λ value meeting wavelength coverage with its equal proportion can be obtained by the value changing grating constant a.Operation wavelength grating constant can regulate between not considering in dispersion or the insignificant situation of dispersion by dielectric posts.
Calculated by numerical value scanning, d
2=0.3a, d
3=0.2817a, d
5=1.2997a, normalization frequency of light wave f=0.4121, relative dielectric constant ε
r=12.9, light signal exports maximal value from port 2, and exports minimum from port 3.When bias magnetic field direction changes, H
0and M
ssign modification, the circumferential direction of light signal should be changed.Therefore, light signal exports maximal value from port 3, and exports minimum from port 2.
Bias magnetic field is produced by biased electrical magnet, loads bias current in biased electrical magnet, and this bias current is modulation signal, variable period signal when modulation signal is.
The anti-phase optical clock signal generator of two-way, under mechanical periodicity bias magnetic field, utilizes Faraday rotation effect, makes the angle required for light rotation, is alternately exported by two ports, namely exports the contrary optical clock signal of two-way phase place.
Determine to meet H=H by regulating the size of bias magnetic field H
0time, light exports from port 3, H=-H
0time, light exports from port 2.Thus realize the anti-phase optical clock signal generator of two-way.
After introduce above-mentioned defect in silicon dielectric posts Waveguide array, incoming signal port is positioned at the position of the port one of left shown in Fig. 1, and this port one place is TE light signal.Light signal is propagated in the waveguide formed with the dielectric posts array of silicon dielectric posts 4, and after TE light signal arrives the defective locations of defective media post 6, TE light signal will all pass through, and last TE light signal exports in output port 2 position; TE light signal does not almost export in output port 3 position.Meanwhile, insertion loss is very little in the waveguide.Now, port 2 is in conducting state, and port 3 is in closed condition.When bias magnetic field direction changes, incoming signal port is positioned at the position of the port one of left shown in Fig. 1, and this port one place is TE light signal.Light signal is propagated in the waveguide formed with the dielectric posts array of silicon dielectric posts 4, and after TE light signal arrives the defective locations of defective media post 6, TE light signal will all pass through, and last TE light signal exports in output port 3 position; TE light signal does not almost export in output port 2 position.Meanwhile, insertion loss is very little in the waveguide.Now, port 3 is in conducting state, and port 2 is in closed condition.
As shown in Figure 4, by control voltage, obtain luminous power output waveform, wherein T
1period magnetic field is-H, exports from port 2; T
2period magnetic field is H, exports from port 3.Optical clock signal dutycycle=signal be 1 time/signal be 0 time=T
1/ T
2.Pulse rise time=rect.p. edge time required when rising to 90% of maximum power output from 0, the pulse rise time of this structure depends on the pace of change in magnetic field.
By regulating the positive and negative Selecting time ratio of modulation signal, the dutycycle of adjustable clock signal, it equal modulation signal be on the occasion of time and modulation signal be the ratio of negative time.
Optical clock parameter:
(1) pulse rise time=rect.p. edge time required when rising to 90% of maximum power output from 0, the pulse rise time of this structure depends on the pace of change in magnetic field.
(2) change frequency in clock frequency=magnetic field
(3) logic contrast is defined as:
For port 2 conducting: the 10log output power of port 2 (during the conducting during output power/disconnection of port 2)=10log (P
open/ P
close)
For port 3 conducting: the 10log output power of port 3 (during the conducting during output power/disconnection of port 3)=10log (P
open/ P
close)
Isolation is defined as: isolation=10log (power input/isolation end output power)=10log (P
enter/ P
every)
Embodiment 1
In the present embodiment, when not considering dispersion or material dispersion variation is very little, changing the method for grating constant by equal proportion, the function of the anti-phase optical clock signal generator of two-way under different wave length can be realized.Make parameter a=6.1772 × 10
-3[m], d
2=0.3a, d
3=0.2817a, d
5=1.2997a, μ=9.6125, p=0.7792, normalization frequency of light wave ω a/2 π c=0.4121, other parameter constants, make it correspond to the light wave of 20GHz.With reference to Fig. 5, the logic contrast obtained within the scope of the frequency of light wave of forbidden band by simulation calculation, this structure has high logic contrast, two-way anti-phase optical clock signal generator function.
Embodiment 2
In the present embodiment, when not considering dispersion or material dispersion variation is very little, changing the method for grating constant by equal proportion, the function of the anti-phase optical clock signal generator of two-way under different wave length can be realized.Make parameter a=4.1181 × 10
-3[m], d
2=0.3a, d
3=0.2817a, d
5=1.2997a, μ=9.6125, p=0.7792, normalization frequency of light wave ω a/2 π c=0.4121, other parameter constants, make it correspond to the light wave of 30GHz.With reference to Fig. 6, the logic contrast obtained within the scope of the frequency of light wave of forbidden band by simulation calculation, this structure has high logic contrast, two-way anti-phase optical clock signal generator function.As shown in Figure 6, when normalization frequency of light wave ω a/2 π c=0.4121, its logic contrast can reach 48dB.
Embodiment 3
In the present embodiment, when not considering dispersion or material dispersion variation is very little, changing the method for grating constant by equal proportion, the function of the anti-phase optical clock signal generator of two-way under different wave length dutycycle can be realized.Make parameter a=3.0886 × 10
-3[m], d
2=0.3a, d
3=0.2817a, d
5=1.2997a, μ=9.6125, p=0.7792, normalization frequency of light wave ω a/2 π c=0.4121, other parameter constants, make it correspond to the light wave of 40GHz.With reference to Fig. 7, the logic contrast obtained within the scope of the frequency of light wave of forbidden band by simulation calculation, this structure has high logic contrast, two-way anti-phase optical clock signal generator function.
As shown in Figure 8, when normalization frequency of light wave ω a/2 π c=0.4121, calculated by finite element software COMSOL, the light field simulation figure obtained.Can observe, TE light is transmitted to port 2 and port 3 respectively efficiently.
The above the present invention all has improvements in embodiment and range of application, not should be understood to limit the present invention.
Claims (10)
1. photonic crystal T-shaped waveguide right angle exports the anti-phase optical clock signal generator of two-way, comprises the T-shaped waveguide of photonic crystal that has TE forbidden band; Described generator also comprises an input end (1), two output terminals (2,3), background silicon dielectric posts (4), isosceles right triangle defective media post (5) and defective media posts (6), and this generator also comprises electromagnet (7) and the square wave current source (9) that provides bias magnetic field; The left end of the T-shaped waveguide of described photonic crystal is input end (1); Described output terminal (2,3) lays respectively at right-hand member, the upper end of the T-shaped waveguide of photonic crystal; Described defective media post (6) is positioned at T-shaped waveguide core infall; Described 4 isosceles right triangle defective media posts (5) lay respectively at four corners that T-shaped waveguide intersects; Described photon crystal wave-guide inputs TE carrier light by port (1), then exports the contrary optical clock signal of two-way phase place from port (2,3).
2. export the anti-phase optical clock signal generator of two-way according to photonic crystal according to claim 1 T-shaped waveguide right angle, it is characterized in that: described generator comprises wire (8) further, one end of described electromagnet (7) is connected by wire (8) one end with square wave current source (9); Mechanical periodicity is done in time in the direction of the bias magnetic field that described electromagnet (7) provides.
3. export the anti-phase optical clock signal generator of two-way according to photonic crystal according to claim 1 T-shaped waveguide right angle, it is characterized in that: described photonic crystal is Two dimensional square lattice photonic crystal.
4. export the anti-phase optical clock signal generator of two-way according to photonic crystal according to claim 1 T-shaped waveguide right angle, it is characterized in that: described photonic crystal is made up of high refractive index medium material and low-index material, described high refractive index medium material is the medium that silicon or refractive index are greater than 2; Described low refractive index dielectric is the medium that air or refractive index are less than 1.4.
5. export the anti-phase optical clock signal generator of two-way according to photonic crystal according to claim 1 T-shaped waveguide right angle, it is characterized in that: described T-shaped waveguide is the structure after removing a middle horizontally-arranged and middle vertical setting of types dielectric posts in photonic crystal.
6. export the anti-phase optical clock signal generator of two-way according to photonic crystal according to claim 1 T-shaped waveguide right angle, it is characterized in that: 4 background media posts (4) of described T-shaped waveguide intersection corner delete an angle respectively to form isosceles right triangle defective media post, and this isosceles right triangle defective media post (5) is triangle column type.
7. export the anti-phase optical clock signal generator of two-way according to photonic crystal according to claim 1 T-shaped waveguide right angle, it is characterized in that: the shape of described background silicon dielectric posts (4) is square.
8. export the anti-phase optical clock signal generator of two-way according to photonic crystal according to claim 7 T-shaped waveguide right angle, it is characterized in that: described square silicon dielectric posts is rotated counterclockwise 41 degree with dielectric posts axis z-axis direction.
9. export the anti-phase optical clock signal generator of two-way according to photonic crystal according to claim 1 T-shaped waveguide right angle, it is characterized in that: described defective media post (6) is ferrite square column, its shape is square, the magnetic permeability of described ferrite square column is anisotropy, and being subject to the control of bias magnetic field, bias magnetic field direction is along the axis direction of ferrite square column.
10. export the anti-phase optical clock signal generator of two-way according to photonic crystal according to claim 1 T-shaped waveguide right angle, it is characterized in that: described port (2) and port (3) layout at a right angle.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610086380.4A CN105572922B (en) | 2016-02-15 | 2016-02-15 | Photonic crystal T-shaped waveguide right-angle output double-path reverse optical clock signal generator |
| PCT/CN2016/106584 WO2017140134A1 (en) | 2016-02-15 | 2016-11-21 | Two-way inverted optical clock signal generator with photonic crystal t-type waveguide right-angle output |
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| CN201610086380.4A CN105572922B (en) | 2016-02-15 | 2016-02-15 | Photonic crystal T-shaped waveguide right-angle output double-path reverse optical clock signal generator |
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| CN105572922A true CN105572922A (en) | 2016-05-11 |
| CN105572922B CN105572922B (en) | 2021-02-19 |
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| CN201610086380.4A Expired - Fee Related CN105572922B (en) | 2016-02-15 | 2016-02-15 | Photonic crystal T-shaped waveguide right-angle output double-path reverse optical clock signal generator |
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| WO (1) | WO2017140134A1 (en) |
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| WO2017140134A1 (en) * | 2016-02-15 | 2017-08-24 | 深圳大学 | Two-way inverted optical clock signal generator with photonic crystal t-type waveguide right-angle output |
| WO2017140135A1 (en) * | 2016-02-15 | 2017-08-24 | 深圳大学 | Dual-path inverted optical clock signal generator with photonic crystal waveguide |
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| WO2017152653A1 (en) * | 2016-02-15 | 2017-09-14 | 深圳大学 | Photonic crystal t-type waveguide-based magnetic control either/or right angle output optical path switch |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017140134A1 (en) | 2017-08-24 |
| CN105572922B (en) | 2021-02-19 |
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