CN101126828A - Two-dimensional complete band gap photon crystal polarization and depolarization beam splitter - Google Patents
Two-dimensional complete band gap photon crystal polarization and depolarization beam splitter Download PDFInfo
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- CN101126828A CN101126828A CNA2007101443030A CN200710144303A CN101126828A CN 101126828 A CN101126828 A CN 101126828A CN A2007101443030 A CNA2007101443030 A CN A2007101443030A CN 200710144303 A CN200710144303 A CN 200710144303A CN 101126828 A CN101126828 A CN 101126828A
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Abstract
The utility model provides a beam splitter of two-dimensional complete bandgap photon crystalloid polarization and depolarization. The distributing of the crystalloid lattice of the photon crystalloid is shaped like hexagonal beehive. The photon crystalloid is composed of an input wave-guide and two output wave-guides; a parallel coupling effect area is arranged between the input wave-guide and the output wave-guide; the exit end of the coupling area is connected with the output wave-guides via the kinked wave-guide. Both of the input and output wave-guides comprise two rows of dielectric bar drawback, and the distance between the two parallel wave-guides of the coupled area is one to three rows dielectrics sticks. With the complete photon bandgap, the utility model has the obvious advantages that the polarization beam splitting and the depolarization beam splitting are realized, the size is small and the splitter is easy to integrate.
Description
(1) technical field
The present invention relates to a kind of light wave beam splitter, belong to the photoelectron technology field.
(2) background technology
Photonic crystal (Photonic Crystal) is the structure that dielectric is periodic distribution, its feature is to have the photon frequency forbidden band, light with frequency in the photon frequency forbidden band can not transmit in photonic crystal, but can at random control flowing of light wave by introducing defective.The photonic crystal function element is compared with the conventional waveguide device, owing to presenting and the optical characteristics of horn of plenty has important application prospects, open the light as make catoptron, antenna, light of photonic crystal, image intensifer, optical waveguide, microcavity, no threshold value laser instrument etc.; Existing business-like big core diameter photonic crystal single-mode fiber on the market, the airport microstructured optical fibers, high non-linear photon crystal optical fiber and high double-refraction photon crystal fiber are sold.But the size of photon crystal device and chip area subminiaturization, loss is low, can realize the wide-angle bending, the development of the photon integrated functionality loop chip that is highly advantageous to, cost also will reduce significantly.
Polarization and depolarization beam splitter are the Primary Components in optical signal processing system and the optical communication.Polarization beam apparatus is that the unpolarized electromagnetic wave of a branch of incident is resolved into the electromagnetic wave device that two bundles have different polarization.Traditional polarizer is only effective to very little frequency range or a certain incident angle scope, is difficult to obtain simultaneously high degree of polarization and transmissivity, and volume is also bigger, is not easy to realize that photon is integrated.Based on the existing research of the polarization beam apparatus of photonic crystal.Document [Mehmet Bayindir, Appl.Phys.Lett.77,3902,2000] has designed square lattice photonic crystals splitter, but only can realize single polarization beam splitting effect.Document [X.Y.Chen, ChinesePhys.Lett.21,1285,2004] designed the waveguide of photon crystal linear defect Y type, branch-waveguide sees through the electromagnetic wave of a polarization state and reflects the electromagnetic wave of another polarization state, another waveguide then conversely, but the triangular crystal lattice structure has complete band gap, need very high packing ratio, require very high manufacture craft.Document [X.Y.Ao, Appl.Phys.Lett.89,171115,2006] designed polarization beam apparatus based on light quantum crystal positive/negative refraction, the electromagnetic wave of a polarization state is crossed photonic crystal with the positive refraction transmission, and another polarization state is then crossed photonic crystal with the negative refraction transmission.Depolarization beam splitter is that the unpolarized electromagnetic wave of a branch of incident is resolved into the electromagnetic wave device that two bundles have identical beam intensity ratio, all utilizes Amici prism to realize at present, and the photonic crystal depolarization beam splitter yet there are no report.
(3) summary of the invention
The object of the present invention is to provide the high volume size of a kind of transmitance little, it is integrated to be easier to extensive optics, the two-dimensional complete band gap photon crystal polarization and the depolarization beam splitter that two polarization states of incident light can be separated fully or two polarization states are all separated by identical beam intensity ratio.
The object of the present invention is achieved like this: it is hexagon cellular shape that the lattice of photonic crystal of the present invention is arranged, it comprises an input waveguide and two output waveguides, one section coupling district parallel to each other is arranged between input waveguide and output waveguide, the coupled zone endpiece links to each other with output waveguide by the bending waveguide, input waveguide and output waveguide constitute by 2 row's dielectric rod defectives, and coupled zone two parallel waveguide spacings are 1-3 row dielectric rod.
The present invention can also comprise:
1, the length of coupled zone is recently regulated according to coupling.
2, the length of coupled zone is regulated by the radius that increases and reduce coupled zone dielectric rod.
3, the refractive index of dielectric rod is greater than the refractive index of background dielectric material.
The present invention is based on the photonic crystal theory, realize complete band gap polarization and depolarization device, compare size with common waveguide beam splitter and can do forr a short time, energy loss is little and can realize the wide-angle bending.The tangible advantage of structure of the present invention is to have complete photonic band gap, can realize polarization beam splitting, can realize the depolarization beam splitting again, and size is easy to integrated for a short time.
Advantage of the present invention is the notion of photonic crystal is used for beam splitter.Because of the honeycomb lattice photonic crystal is not the complete photonic band gap that just there is broad in very high situation in medium post dutycycle, can reduce manufacture difficulty, overcome the requirement of manufacture craft.Utilize this complete band gap can realize that polarization can realize depolarization beam splitting function element again.This photon crystal device is simple in structure, and size is little, and it is integrated to be easier to optics.
(4) description of drawings
Fig. 1 is photon crystal polarization of the present invention and depolarization beam splitter structural drawing.
Fig. 2-a and Fig. 2-b are polarization beam apparatus analog result figure of the present invention.
Fig. 3-a and Fig. 3-b are depolarization beam splitter analog result figure of the present invention.
(5) embodiment
For example the present invention is done description in more detail below in conjunction with accompanying drawing:
In conjunction with Fig. 1, it is hexagon cellular shape that the lattice of photon crystal 1 is arranged, and background is an air, and grating constant is a, and the medium post is silicon Si.Comprise an input waveguide 2 and two output waveguides 4 and 5, there are one section coupling district 3 parallel to each other in 4,5 of input waveguide 2 and output waveguides, coupled zone 3 endpiece link to each other with output waveguide 4,5 by the bending waveguide, input waveguide 2 and output waveguide constitute by 2 row's dielectric rod defectives, and coupled zone two parallel waveguide spacings are 2 row's dielectric rods.The length of coupled zone can recently be regulated according to coupling, also can regulate by the radius that increases and reduce coupled zone dielectric rod.
Embodiment 1:
Take hexagon cellular structure shown in Figure 1, background is an air, grating constant is a, the relative dielectric constant ε of silicon Si medium post is taken as 11.38, the medium column radius is about 0.15a, input waveguide and output waveguide constitute by 2 row's dielectric rod defectives, and coupled zone two parallel waveguide spacings are 2 row's dielectric rods.When the coupling length field is 80a, during incident light wave normalized frequency ω a/2 π c=0.9743, can be used for polarization beam apparatus, ω is a frequency of light wave, and c is the light velocity in the vacuum, and TE and the pairing field distribution of TM two-mode such as Fig. 2 show.
Embodiment 2:
Take hexagon cellular structure shown in Figure 1, background is an air, grating constant is a, the relative dielectric constant ε of silicon Si medium post is taken as 11.38, the medium column radius is about 0.15a, input waveguide and output waveguide constitute by 2 row's dielectric rod defectives, and coupled zone two parallel waveguide spacings are 2 row's dielectric rods.When the coupling section length is 30a, during incident light wave normalized frequency ω a/2 π c=0.9822, can be used for depolarization beam splitter, ω is a frequency of light wave, and c is the light velocity in the vacuum, and TE and the pairing field distribution of TM two-mode such as Fig. 3 show.
Claims (5)
1. two-dimensional complete band gap photon crystal polarization and depolarization beam splitter, it is characterized in that: it is hexagon cellular shape that the lattice of photonic crystal is arranged, it comprises an input waveguide and two output waveguides, one section coupling district parallel to each other is arranged between input waveguide and output waveguide, the coupled zone endpiece links to each other with output waveguide by the bending waveguide, input waveguide and output waveguide constitute by 2 row's dielectric rod defectives, and coupled zone two parallel waveguide spacings are 1-3 row dielectric rod.
2. two-dimensional complete band gap photon crystal polarization according to claim 1 and depolarization beam splitter is characterized in that: the length of coupled zone is recently regulated according to coupling.
3. two-dimensional complete band gap photon crystal polarization according to claim 1 and 2 and depolarization beam splitter is characterized in that: the length of coupled zone is regulated by the radius that increases and reduce coupled zone dielectric rod.
4. two-dimensional complete band gap photon crystal polarization according to claim 1 and 2 and depolarization beam splitter is characterized in that: the refractive index of dielectric rod is greater than the refractive index of background dielectric material.
5. two-dimensional complete band gap photon crystal polarization according to claim 3 and depolarization beam splitter is characterized in that: the refractive index of dielectric rod is greater than the refractive index of background dielectric material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101443030A CN100541249C (en) | 2007-09-12 | 2007-09-12 | Two-dimensional complete band gap photon crystal and depolarization beam splitter |
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| CNB2007101443030A CN100541249C (en) | 2007-09-12 | 2007-09-12 | Two-dimensional complete band gap photon crystal and depolarization beam splitter |
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| CN101126828A true CN101126828A (en) | 2008-02-20 |
| CN100541249C CN100541249C (en) | 2009-09-16 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881862A (en) * | 2010-06-07 | 2010-11-10 | 南昌大学 | Ultramicro polarization beam splitter based on photonic crystal micro-resonance loop |
| CN102569968A (en) * | 2012-01-12 | 2012-07-11 | 中国科学院上海微系统与信息技术研究所 | Electromagnetic beam control method, beam deflector, beam splitter and changeover switch of beam deflector and beam splitter |
| CN102650714A (en) * | 2012-01-13 | 2012-08-29 | 深圳大学 | T-shaped polarization beam splitter with photonic crystal waveguide |
| CN102650713A (en) * | 2012-01-13 | 2012-08-29 | 深圳大学 | Photonic crystal waveguide TM-polarization separator |
| CN102650715A (en) * | 2012-01-13 | 2012-08-29 | 深圳大学 | Photonic crystal waveguide TE-polarization separator |
| CN103941337A (en) * | 2014-02-22 | 2014-07-23 | 浙江大学 | Y-type polarization filtering beam splitter based on isomorphic two-dimension photonic crystals |
| CN104280889A (en) * | 2014-10-27 | 2015-01-14 | 京东方科技集团股份有限公司 | 3D display part and 3D display device |
| CN104407416A (en) * | 2014-11-27 | 2015-03-11 | 中国计量学院 | M-shaped one-dimensional photonic crystal terahertz wave polarization beam splitter |
| US9170375B2 (en) | 2012-01-13 | 2015-10-27 | Shenzhen University | TM-polarization splitter based on photonic crystal waveguide |
| CN112113691A (en) * | 2019-06-21 | 2020-12-22 | 南京邮电大学 | Gallium arsenide photonic crystal pressure sensor considering temperature influence |
-
2007
- 2007-09-12 CN CNB2007101443030A patent/CN100541249C/en not_active Expired - Fee Related
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881862A (en) * | 2010-06-07 | 2010-11-10 | 南昌大学 | Ultramicro polarization beam splitter based on photonic crystal micro-resonance loop |
| CN102569968B (en) * | 2012-01-12 | 2013-11-06 | 中国科学院上海微系统与信息技术研究所 | Electromagnetic beam control method, beam deflector, beam splitter and changeover switch of beam deflector and beam splitter |
| CN102569968A (en) * | 2012-01-12 | 2012-07-11 | 中国科学院上海微系统与信息技术研究所 | Electromagnetic beam control method, beam deflector, beam splitter and changeover switch of beam deflector and beam splitter |
| US9170375B2 (en) | 2012-01-13 | 2015-10-27 | Shenzhen University | TM-polarization splitter based on photonic crystal waveguide |
| CN102650715B (en) * | 2012-01-13 | 2015-04-08 | 深圳大学 | Photonic crystal waveguide TE-polarization separator |
| WO2013104302A1 (en) * | 2012-01-13 | 2013-07-18 | 深圳大学 | Photonic crystal waveguide tm-polarization splitter |
| WO2013104307A1 (en) * | 2012-01-13 | 2013-07-18 | 深圳大学 | Photonic crystal waveguide te-polarization splitter |
| CN102650713A (en) * | 2012-01-13 | 2012-08-29 | 深圳大学 | Photonic crystal waveguide TM-polarization separator |
| CN102650715A (en) * | 2012-01-13 | 2012-08-29 | 深圳大学 | Photonic crystal waveguide TE-polarization separator |
| CN102650714A (en) * | 2012-01-13 | 2012-08-29 | 深圳大学 | T-shaped polarization beam splitter with photonic crystal waveguide |
| US9164232B2 (en) | 2012-01-13 | 2015-10-20 | Shenzhen University | TE- polarization splitter based on photonic crystal waveguide |
| CN102650713B (en) * | 2012-01-13 | 2015-04-08 | 深圳大学 | Photonic crystal waveguide TM-polarization separator |
| CN102650714B (en) * | 2012-01-13 | 2015-04-08 | 深圳大学 | T-shaped polarization beam splitter with photonic crystal waveguide |
| CN103941337A (en) * | 2014-02-22 | 2014-07-23 | 浙江大学 | Y-type polarization filtering beam splitter based on isomorphic two-dimension photonic crystals |
| CN103941337B (en) * | 2014-02-22 | 2017-01-04 | 浙江大学 | Y type polarization filtering beam splitter based on isomorphism 2 D photon crystal |
| CN104280889A (en) * | 2014-10-27 | 2015-01-14 | 京东方科技集团股份有限公司 | 3D display part and 3D display device |
| CN104407416A (en) * | 2014-11-27 | 2015-03-11 | 中国计量学院 | M-shaped one-dimensional photonic crystal terahertz wave polarization beam splitter |
| CN104407416B (en) * | 2014-11-27 | 2017-06-06 | 中国计量学院 | M shape 1-D photon crystal terahertz polarization beam splitters |
| CN112113691A (en) * | 2019-06-21 | 2020-12-22 | 南京邮电大学 | Gallium arsenide photonic crystal pressure sensor considering temperature influence |
| CN112113691B (en) * | 2019-06-21 | 2022-01-25 | 南京邮电大学 | Gallium arsenide photonic crystal pressure sensor considering temperature influence |
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| CN100541249C (en) | 2009-09-16 |
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