CN104950387B - Column type tetragonal photonic crystal high index of refraction list compensates scattering post orthogonal wave-guide - Google Patents
Column type tetragonal photonic crystal high index of refraction list compensates scattering post orthogonal wave-guide Download PDFInfo
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- CN104950387B CN104950387B CN201410515225.0A CN201410515225A CN104950387B CN 104950387 B CN104950387 B CN 104950387B CN 201410515225 A CN201410515225 A CN 201410515225A CN 104950387 B CN104950387 B CN 104950387B
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- 239000004038 photonic crystal Substances 0.000 title claims abstract description 58
- 239000000463 material Substances 0.000 claims description 13
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 239000010703 silicon Substances 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- 241001132374 Asta Species 0.000 claims description 3
- 229910001218 Gallium arsenide Inorganic materials 0.000 claims description 3
- ORUIBWPALBXDOA-UHFFFAOYSA-L Magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 238000003780 insertion Methods 0.000 description 8
- 238000005286 illumination Methods 0.000 description 6
- 238000010606 normalization Methods 0.000 description 5
- 230000003287 optical Effects 0.000 description 5
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 210000004940 Nucleus Anatomy 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 230000001447 compensatory Effects 0.000 description 1
- 230000001808 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002269 spontaneous Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Abstract
The invention discloses a kind of column type tetragonal photonic crystal high index of refraction list and compensate scattering post orthogonal wave-guide, it, by the first medium post of high index of refraction photonic crystal by tetragonal arrangement in low-refraction background media, removes the first medium post of a row and string high index of refraction to form orthogonal wave-guide in described photonic crystal；The second medium post of one high index of refraction is set in the corner of described orthogonal wave-guide；Described second medium post is for compensating scattering post；Described first medium post is high index of refraction circular columns.The structure of the present invention has extremely low reflectance and the highest transfer rate, it is simple to extensive light path is integrated, and this is that the application of photonic crystal provides broader space.
Description
Technical field
The present invention relates to photonic crystal turn round waveguide, especially column type tetragonal photonic crystal
High index of refraction list compensates scattering post orthogonal wave-guide.
Background technology
1987, the E.Yablonovitch of U.S.'s Bell laboratory suppressed spontaneous discussing how
The S.John of radiation and Princeton university proposes independently of one another at discussion light subregion
The concept of photonic crystal (PC).Photonic crystal is that a kind of dielectric material is in space in periodically
The structure of matter of arrangement, is generally had differing dielectric constant material and constitutes by two or more
Artificial intraocular lenses.The propagation of light has more by force by photonic crystal, control ability flexibly, not only
To linear transport, and to sharp keen right angle, the efficiency of its transmission is the highest.If
PC structure introduces a line defect, creates a guide-lighting passage, referred to as photonic crystal light
Waveguide (PCW).Even if this waveguide also only has the least loss the corner of 90 °.With
Traditional fiber waveguide of basic total internal reflection is entirely different, and it mainly utilizes the guided wave of defect state to imitate
Should, the introducing of defect forms new |photon state | in photon band gap (PBG), and at defect state
Photon state density around is zero.Therefore, photonic crystal optical waveguides utilizes defect mode to realize light
Transmission will not produce mold leakage, and photonic crystal optical waveguides is the basic of composition integreted phontonics light path
Device, photonic crystal waveguide of turning round can improve light path integrated level, associated research for
The development of integrated optical circuit is significant.
Summary of the invention
It is an object of the invention to overcome deficiency of the prior art, it is provided that a kind of have extremely low anti-
The column type tetragonal photonic crystal high index of refraction list penetrating rate and the highest transfer rate compensates
Scattering post orthogonal wave-guide.
In order to realize object above, the present invention is to take following design:
The column type tetragonal photonic crystal high index of refraction list of the present invention compensates scattering post right angle
Waveguide, is pressed regular crystal grillages by the first medium post of high index of refraction in low-refraction background media
The photonic crystal of row, removes the of a row and string high index of refraction in described photonic crystal
One dielectric posts is to form orthogonal wave-guide；One high refraction is set in the corner of described orthogonal wave-guide
The second medium post of rate；Described second medium post is for compensating scattering post；
Described first medium post is high index of refraction circular columns.
Described second medium post is semicircular pillar, arch post, cylinder, triangular prism, polygon post,
Or the pillar that cross-sectional profiles line is round and smooth closed curve.
Described second medium post is semicircular pillar.
The material of described high index of refraction background media is silicon, GaAs, titanium dioxide, or
The refractive index medium more than 2.
Described high index of refraction background media material is silicon, and its refractive index is 3.4.
Described low-refraction background media is air, vacuum, Afluon (Asta), silicon dioxide,
Or the medium that refractive index is less than 1.6.
Described low-refraction background media is air.
Described orthogonal wave-guide is TE mode of operation waveguide.
The area of described orthogonal wave-guide structure is that photon is brilliant more than or equal to 7a × 7a, described a
The lattice paprmeter of body.
Photonic crystal optical waveguides device can be widely used in various photonic integrated device.It is with existing
There is technology to compare, have a following good effect:
1. the column type tetragonal photonic crystal high index of refraction list of the present invention compensates scattering post
Orthogonal wave-guide has extremely low reflectance and the highest transfer rate, and this is the application of photonic crystal
Provide broader space；
2. the structure of the present invention is based on Multiple Scattering Theory, is compensated by single high refractive index medium
Scattering post realizes the compensation of phase and amplitude to the light wave of transmission in it, to reduce reflectance, carries
Rise absorbance, it is possible to realize antiradar reflectivity and high-transmission rate；
3. the column type tetragonal photonic crystal high index of refraction list compensation scattering post of the present invention is straight
Angle waveguide, based on tetragonal structure, can be used in large-scale integrated light path design, and light path is succinct,
Being easy to design, the most extensive light path is integrated；
4. the column type tetragonal photonic crystal high index of refraction list compensation scattering post of the present invention is straight
Angle waveguide is based on tetragonal structure so that between different optical elements and do not share the same light in light path
It is easily achieved connection and coupling between road, advantageously reduces cost.
Accompanying drawing explanation
Fig. 1 is that the column type tetragonal photonic crystal high index of refraction list of the present invention compensates scattering
The nucleus schematic diagram of the structure of post orthogonal wave-guide.
Fig. 2 is that the column type tetragonal photonic crystal high index of refraction list of the present invention compensates scattering
The normalized frequency transmission characteristic figure of post orthogonal wave-guide.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail.
As it is shown in figure 1, the column type tetragonal photonic crystal high index of refraction list of the present invention compensates
Scattering post orthogonal wave-guide by the first medium post of high index of refraction in low-refraction background media
By tetragonal arrangement photonic crystal, remove in described photonic crystal a row and
The first medium post of string high index of refraction is to form orthogonal wave-guide, at described orthogonal wave-guide
Corner arranges the second medium post of a high index of refraction；Described second medium post is for compensating
Scattering post, produces compensatory reflex ripple and offsets with waveguide intrinsic echo；Described compensation scatters
Dielectric posts can also use various shape, such as: semicircular pillar, arch post, cylinder,
Triangular prism, polygon post, naturally it is also possible to using cross-sectional profiles line is round and smooth closed curve
Pillar, described second medium post (compensating scattering medium post) is semicircular pillar, described high refraction
Rate dielectric material is respectively adopted silicon, GaAs, titanium dioxide, or refractive index Jie more than 2
Matter；Described low-refraction background media can use air, vacuum, Afluon (Asta), silicon dioxide,
Or the medium that refractive index is less than 1.6.
Following 6 embodiments are given according to result above:
The lattice paprmeter of tetragonal photonic crystal described in embodiment 1. is a；High index of refraction
First medium post is circular columns, and its radius is 0.18a；The light wave polarization of transmission in waveguide
For TE ripple；Second medium post is semicircular pillar, i.e. lower right corner semicircle high refractive index medium is mended
The radius repaying scattering post is 0.39312a；Its on the basis of initial point at X to the displacement with Z-direction
Being respectively 0.63999a and 0.06213a, its anglec of rotation is 267.446859 degree；Light source
The X of distance initial point is (-4a, 0) to the displacement with Z-direction；The initial phase of incident illumination is 0
Degree.Described high index of refraction background media material is silicon (Si), and its refractive index is 3.4；Described low
Refractive index background media is air.The physical dimension of described orthogonal wave-guide is 15a × 15a, this
The photonic crystal orthogonal wave-guide of Shi Suoshu return loss spectrum and insertion loss spectrum as in figure 2 it is shown,
The transverse axis part of this figure is the operating frequency of this structure, and longitudinal axis part is then its transmission characteristic, figure
In the return loss that dotted line is this structure (be defined as LR=-10log (PR/PI)), solid line is then
Its insertion loss (is defined as LI=-10log (PT/PI)), P thereinIFor the incident power of this structure,
PRFor the reflection power of this structure, PTThrough-put power for this structure.In normalized frequency it is
0.336 (ω a/2 π c) place, the maximum return loss of photonic crystal orthogonal wave-guide is 39.88dB
It is 0.0018dB with minimum insertion loss.
Lattice paprmeter a of tetragonal photonic crystal described in embodiment 2. is 0.5208 micron,
Optimal normalization wavelength is 1.71 microns；The first medium post of high index of refraction is circular columns, its
Radius is 0.093744 micron；In waveguide, the light wave polarization of transmission is TE ripple；Second
Dielectric posts is semicircular pillar, i.e. lower right corner semicircle high refractive index medium compensates the radius of scattering post
It it is 0.204738 micron；It is respectively to the displacement with Z-direction at X on the basis of initial point
0.333311 micron and 0.032361 micron, its anglec of rotation is 267.446859 degree；Light
Spacing is (-2.0832,0) (micron) from the X of initial point to the displacement with Z-direction；Incident illumination
Initial phase be 0 degree.Described high index of refraction background media material is silicon (Si), its refraction
Rate is 3.4；Described low-refraction background media is air.Described photonic crystal orthogonal wave-guide
Physical dimension is 15a × 15a, and its maximum return loss is 21.532672dB and minimum insertion
Loss is 0.050712dB.
Lattice paprmeter a of tetragonal photonic crystal described in embodiment 3. is 0.5208 micron,
Making optimal normalization wavelength is 1.55 microns, and the first medium post of high index of refraction is circular columns,
Its radius is 0.093744；In waveguide, the light wave polarization of transmission is TE ripple；Second is situated between
Matter post is semicircular pillar, i.e. the radius of lower right corner semicircle high refractive index medium compensation scattering post is
0.204738 micron；It is respectively to the displacement with Z-direction at X on the basis of initial point
0.333311 micron and 0.032361 micron, its anglec of rotation is 267.446859 degree；Light
Spacing is (-2.0832,0) (micron) from the X of initial point to the displacement with Z-direction；Incident illumination
Initial phase be 0 degree.Described high index of refraction background media material is silicon (Si), its refraction
Rate is 3.4；Described low-refraction background media is air.Described photonic crystal orthogonal wave-guide
Physical dimension is 15a × 15a, and its maximum return loss is 39.88dB and minimum insertion loss
For 0.0018dB.
Lattice paprmeter a of tetragonal photonic crystal described in embodiment 4. is 0.336 micron,
Making optimal normalization wavelength is 1.00 microns, and the first medium post of high index of refraction is circular columns,
Its radius is 0.06048 micron；In waveguide, the light wave polarization of transmission is TE ripple；Second
Dielectric posts is semicircular pillar, i.e. lower right corner semicircle high refractive index medium compensates the radius of scattering post
It it is 0.132088 micron；It is respectively to the displacement with Z-direction at X on the basis of initial point
0.215037 micron and 0.020876 micron, its anglec of rotation is 267.446859 degree；Light
Spacing is (-1.344,0) (micron) from the X of initial point to the displacement with Z-direction；Incident illumination
Initial phase is 0 degree.Described high index of refraction background media material is silicon (Si), its refractive index
It is 3.4；Described low-refraction background media is air.The knot of described photonic crystal orthogonal wave-guide
Structure a size of 15a × 15a, its maximum return loss is 39.88dB and minimum insertion loss is
0.0018dB。
Lattice paprmeter a of tetragonal photonic crystal described in embodiment 5. is 0.49728 micron,
Making optimal normalization wavelength is 1.48 microns, and the first medium post of high index of refraction is circular columns,
Its radius is 0.08951 micron；In waveguide, the light wave polarization of transmission is TE ripple；Second
Dielectric posts is semicircular pillar, i.e. lower right corner semicircle high refractive index medium compensates the radius of scattering post
It it is 0.195491 micron；It is respectively to the displacement with Z-direction at X on the basis of initial point
0.318254 micron and 0.030896 micron, its anglec of rotation is 267.446859 degree；Light
Spacing is (-1.98912,0) (micron) from the X of initial point to the displacement with Z-direction；Incident illumination
Initial phase be 0 degree.Described high index of refraction background media material is silicon (Si), its refraction
Rate is 3.4；Described low-refraction background media is air.Described photonic crystal orthogonal wave-guide
Physical dimension is 15a × 15a, and its maximum return loss is 39.88dB and minimum insertion loss
For 0.0018dB.
Described in embodiment 6., lattice paprmeter a of tetragonal photonic crystal is 168 microns, makes
Optimal normalization wavelength is 500 microns, and the first medium post of high index of refraction is circular columns, its
Radius is 30.24 microns；In waveguide, the light wave polarization of transmission is TE ripple；Second medium
Post is semicircular pillar, i.e. the radius of lower right corner semicircle high refractive index medium compensation scattering post is
66.04416 microns；It is respectively to the displacement with Z-direction at X on the basis of initial point
107.5183 microns and 10.43784 microns, its anglec of rotation is 267.446859 degree；Light
Spacing is (-672,0) (micron) from the X of initial point to the displacement with Z-direction；At the beginning of incident illumination
Beginning phase place is 0 degree.Described high index of refraction background media material is silicon (Si), and its refractive index is
3.4；Described low-refraction background media is air.The structure of described photonic crystal orthogonal wave-guide
A size of 15a × 15a, its maximum return loss is 39.88dB and minimum insertion loss is
0.0018dB。
Detailed description above is only clearly understood that the present invention, and should not be regarded as this
Bright unnecessary restriction, therefore to any change of the present invention to being skilled in technique in this area
People is apparent from.
Claims (11)
1. a column type tetragonal photonic crystal high index of refraction list compensates scattering post rectangular wave
Lead, it is characterised in that it is situated between in low-refraction background by the first medium post of high index of refraction
By the photonic crystal of tetragonal arrangement in matter, in described photonic crystal, remove one
The first medium post of row and string high index of refraction is to form orthogonal wave-guide；At described rectangular wave
The corner led arranges the second medium post of a high index of refraction；Described second medium post is
Compensate scattering post；Described first medium post is high index of refraction circular columns.
2. according to the column type tetragonal photonic crystal high index of refraction list described in claim 1
Compensate scattering post orthogonal wave-guide, it is characterised in that described second medium post is semicircular pillar, bow
Shape post, cylinder, triangular prism, polygon post or cross-sectional profiles line are round and smooth closed curve
Pillar.
3. according to the column type tetragonal photonic crystal high index of refraction list described in claim 2
Compensate scattering post orthogonal wave-guide, it is characterised in that described second medium post is semicircular pillar.
4. according to the column type tetragonal photonic crystal high index of refraction list described in claim 1
Compensate scattering post orthogonal wave-guide, it is characterised in that the material of the first medium post of described high index of refraction
Expect to be more than the medium of 2 for refractive index.
5. according to the column type tetragonal photonic crystal high index of refraction list described in claim 1
Compensate scattering post orthogonal wave-guide, it is characterised in that the material of the first medium post of described high index of refraction
Material is silicon, GaAs or titanium dioxide.
6. according to the column type tetragonal photonic crystal high index of refraction list described in claim 5
Compensate scattering post orthogonal wave-guide, it is characterised in that the first medium column material of described high index of refraction
For silicon, its refractive index is 3.4.
7. according to the column type tetragonal photonic crystal high index of refraction list described in claim 1
Compensate scattering post orthogonal wave-guide, it is characterised in that described low-refraction background media is refractive index
Medium less than 1.6.
8. according to the column type tetragonal photonic crystal high index of refraction list described in claim 1
Compensate scattering post orthogonal wave-guide, it is characterised in that described low-refraction background media be air,
Vacuum, Afluon (Asta) or silicon dioxide.
9. according to the column type tetragonal photonic crystal high index of refraction list described in claim 8
Compensate scattering post orthogonal wave-guide, it is characterised in that described low-refraction background media is air.
10. according to the column type tetragonal photonic crystal high index of refraction list described in claim 1
Compensate scattering post orthogonal wave-guide, it is characterised in that described orthogonal wave-guide is TE mode of operation ripple
Lead.
11. according to the column type tetragonal photonic crystal high index of refraction list described in claim 1
Compensate scattering post orthogonal wave-guide, it is characterised in that the area of described orthogonal wave-guide structure more than or
Equal to 7a × 7a, wherein a is the lattice paprmeter of photonic crystal.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410515225.0A CN104950387B (en) | 2014-09-29 | Column type tetragonal photonic crystal high index of refraction list compensates scattering post orthogonal wave-guide | |
| PCT/CN2015/090880 WO2016050182A1 (en) | 2014-09-29 | 2015-09-28 | High-refractive-index single-compensation-scattering-cylinder right-angle waveguide of cylindrical square lattice photonic crystal |
| US15/396,487 US9784916B2 (en) | 2014-09-29 | 2016-12-31 | Right-angle waveguide based on circular-cylinder-type square-lattice photonic crystal and single compensation scattering cylinder with high refractive index |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410515225.0A CN104950387B (en) | 2014-09-29 | Column type tetragonal photonic crystal high index of refraction list compensates scattering post orthogonal wave-guide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104950387A CN104950387A (en) | 2015-09-30 |
| CN104950387B true CN104950387B (en) | 2017-01-04 |
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|---|---|---|---|---|
| CN1383003A (en) * | 2002-05-24 | 2002-12-04 | 中国科学院上海微系统与信息技术研究所 | 2D photon Si-base crystal waveguide don insulator with dual insulating burried layers and its preparing process |
| WO2009044715A1 (en) * | 2007-10-01 | 2009-04-09 | Nec Corporation | Photonic crystal body |
| CN102809782A (en) * | 2012-08-15 | 2012-12-05 | 深圳大学 | Three-dimensional polarization beam splitter based on two-dimensional photonic crystal sheets |
| CN102830463A (en) * | 2012-08-29 | 2012-12-19 | 深圳大学 | Full-polarization-state integer ratio power distributor with photonic crystal waveguide |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1383003A (en) * | 2002-05-24 | 2002-12-04 | 中国科学院上海微系统与信息技术研究所 | 2D photon Si-base crystal waveguide don insulator with dual insulating burried layers and its preparing process |
| WO2009044715A1 (en) * | 2007-10-01 | 2009-04-09 | Nec Corporation | Photonic crystal body |
| CN102809782A (en) * | 2012-08-15 | 2012-12-05 | 深圳大学 | Three-dimensional polarization beam splitter based on two-dimensional photonic crystal sheets |
| CN102830463A (en) * | 2012-08-29 | 2012-12-19 | 深圳大学 | Full-polarization-state integer ratio power distributor with photonic crystal waveguide |
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