CN102692733A - Multimodal cross polarization filter based on metamaterials - Google Patents
Multimodal cross polarization filter based on metamaterials Download PDFInfo
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- CN102692733A CN102692733A CN2012101626367A CN201210162636A CN102692733A CN 102692733 A CN102692733 A CN 102692733A CN 2012101626367 A CN2012101626367 A CN 2012101626367A CN 201210162636 A CN201210162636 A CN 201210162636A CN 102692733 A CN102692733 A CN 102692733A
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Abstract
The invention provides a multimodal cross polarization filter based on metamaterials. The multimodal cross polarization filter comprises a polarizer, an metamaterial structure and an analyzer which are sequentially arranged; the metamaterial structure comprises a dielectric layer and two metamaterial layers; the two metamaterial layers are respectively positioned on the surfaces of two sides of the dielectric layer, each metamaterial layer consists of metamaterial basic units which are arrayed periodically, structures of the units of the two metamaterial layers are the same, but the units of the two metamaterial layers are perpendicular; each of the structures of the units of the metamaterial layers comprises two metal resonators with different arc lengths, and corresponding central angles include an angle of 140 degrees and an angle of 160 degrees or consists of two other asymmetric angles. The multimodal cross polarization filter can realize cross polarization conversion of a plurality of frequency bands, and a good cross polarization filtering function is realized. Besides, the multimodal cross polarization filter has good tunability and can be used in Terahertz and optical bands.
Description
Technical field
What the present invention relates to is a kind of Polarization filter.
Background technology
The sixties in 19th century, Henry has proposed a kind of very effective polarization spectrum wave filter (C.H.Henry, Phys.Rev.143; 627; 1966), mainly rely in the birefringece crystal energy exchange between two mutually orthogonal polarization modes to realize its polarization spectrum filtering, near the refractive index approximately equal of ordinary light and the extraordinary ray filtering point; Be that birefringence disappears, can realize the function of cross polarization filtering.If when birefringece crystal is placed between two mutually orthogonal linear polarizers, do not have light to see through.Yet, near birefringece crystal etc. during refractive index point, a small disturbance will have a strong impact on eigenstate, can change the polarization state of self through the light of crystal.Therefore, waiting refractive index point place, the crystal that is between the linear polarizer of quadrature can transmit light, realizes the unimodal filtering of cross polarization.The transmission wavelength of cross polarization wave filter is limited by the character of crystal self, for example: crystalline material CdS and CuAlSe
2Etc. the refractive index wavelength be respectively 523nm and 531nm.But up to the present, the available crystal that folding rate characteristic such as has is few, can realize that therefore the wavelength of polarization spectrum filtering is rare, and etc. the refractive index crystal be mostly compound, cost an arm and a leg, seriously hindered the application of crystal and the development of polarization spectrum filtering technique.
The appearance of novel artificial electromagnetic material (Metamaterials) has changed for a long time people to the traditional understanding of specific inductive capacity and magnetic permeability, and it has caused concern widely international with domestic electromagnetism scientific research field.Perfect lens, electromagnetism cape etc. all becomes the research focus rapidly, and the novel artificial electromagnetic material has injected new vigor and vitality for the electromagnetism research field, will produce significant effects to future science and technological development.
The novel artificial electromagnetic material can replace the core cell of traditional cross polarization wave filter-etc. the crystal of refractive index, realize arrowband cross polarization wave filter from the microwave section to any setted wavelength of visible light wave range.Zheludev had proposed a kind of polarization spectrum wave filter based on artificial electromagnetic material (United States Patent (USP) " Spectral filter " in 2011; Publication number: US 2011/0261441A1); Utilize individual layer novel artificial electromagnetic material can realize the cross polarization wave filter: when the electromagnetic wave vertical incidence; Therefore coupling between the no quadrature eigenvector does not have cross polarization conversion output; When the electromagnetic wave oblique incidence, intercouple between 2 orthogonal vectors, cause cross polarization conversion output.But this patent is modulated cross polarization output based on incident angle of light, only can realize unimodal filtering, has limited to its application.
Summary of the invention
The object of the present invention is to provide that a kind of work spectral range is wide, the multimodal cross polarization wave filter based on artificial electromagnetic material of convenient regulation and control, low cost of manufacture.
The objective of the invention is to realize like this:
Comprise the polarizer, manual electromagnetic structure and the analyzer of arranging successively, said manual electromagnetic structure comprises dielectric layer and two-layer artificial electromagnetic material layer; Said two-layer artificial electromagnetic material layer lays respectively at the surface of dielectric layer both sides, and every layer of artificial electromagnetic material layer is made up of the artificial electromagnetic material elementary cell of periodic arrangement, and the cellular construction of two-layer artificial electromagnetic material layer is identical, turn 90 degrees but revolve each other; The cellular construction of said artificial electromagnetic material layer comprises two sections arc length different metallic resonators, and corresponding central angle is respectively the combination of 140 degree and 160 degree or other asymmetric angles.
Fano resonance has asymmetric spectral line shape, and the generation of its asymmetry is attributable to the coexistence of resonance transmission resonant reflection close to each other, can be interpreted as discrete (local attitude) and continuous state results of interaction simply.The Fano effect of unsymmetric structure novel artificial electromagnetic material shows strong polarization dependence, near the Fano resonance frequency, can only see through the electromagnetic wave of special polarization state.If the design double-decker, layer coupling will take place in mutual half-twist between the double-layer structure unit, 2 couplings between the quadrature eigenvector must occur, causes the cross polarization conversion, therefore can design novel deflection device, i.e. the cross polarization wave filter.
Compared with prior art, advantage of the present invention is:
1 wideer work spectral range.Cross polarization wave filter in the past is because the restriction of crystalline material, can only be effective to some specific spectral range, and this mode filter can effectively be worked in wideer frequency range, especially is fit to the filtering of multimodal cross polarization.
2 performance regulation and control more easily.Cross polarization wave filter in the past need be regulated and control filtering characteristic by incident angle, and the present invention need not angle can realize the output of multimodal cross polarization, and material property and artificial electromagnetic material structural parameters can be regulated and control filtering characteristic flexibly.
3 lower manufacturing costs.Than the cross polarization wave filter that uses expensive crystalline material, the present invention is owing to adopt artificial electromagnetic material, and what manufacturing cost will be low relatively is many, and PCB technology and silicon semiconductor process technology can be used for processing artificial electromagnetic material.
Description of drawings
Accompanying drawing 1 (a) is the perspective view of artificial electromagnetic material structural unit.
Accompanying drawing 1 (b) is the front basic parameter figure of artificial electromagnetic material structural unit.
Accompanying drawing 2 is cross polarization filter system synoptic diagram.
Accompanying drawing 3 is simulation results of cross polarization wave filter.
Accompanying drawing 4 is experimental results of cross polarization wave filter.
Accompanying drawing 5 is simulation results of cross polarization wave filter under the no substrate loss situation.
Embodiment
Multimodal cross polarization wave filter based on artificial electromagnetic material of the present invention comprises the polarizer, novel artificial electromagnetic structure and analyzer.Described novel artificial electromagnetic structure comprises dielectric layer and double worker's layer of electro-magnetic material, and dielectric layer adopts the PCB material, and its thickness is the millimeter magnitude; Double worker's layer of electro-magnetic material is positioned at the surface of dielectric layer both sides, and every layer of artificial electromagnetic material is made up of the artificial electromagnetic material elementary cell of periodic arrangement, and two-layer structural unit structure is identical, turn 90 degrees but revolve each other; The elementary cell of artificial electromagnetic material layer comprises two sections arc length different metallic resonators; Corresponding central angle is respectively the combination of 140 degree and 160 degree or other asymmetric angles; The cycle of artificial electromagnetic material is the millimeter magnitude, and ripe PCB technology can be accomplished the preparation of artificial electromagnetic material like a cork.The multimodal cross-filters that the present invention proposes can realize the cross polarization conversion of a plurality of frequency ranges, and this filtering device possesses good tunability, can realize the multimodal cross polarization wave filter of Terahertz and optical band.
Described terahertz wave band multimodal cross polarization wave filter, dielectric layer adopts monocrystalline silicon or organic high molecular polymer dielectric material, and its thickness is the submillimeter magnitude; Described artificial electromagnetic material is the unsymmetric structure of metallic aluminium, and thickness is more than the 200nm; The cycle of artificial electromagnetic material is hundred micron dimensions.
Described optical band multimodal cross polarization wave filter, dielectric layer adopting quartz glass material, its thickness are the submillimeter magnitude; Described artificial electromagnetic material is the unsymmetric structure of gold, and thickness is nanometer scale; The cycle of artificial electromagnetic material is a sub-micrometer scale.
The basic structural unit of double-layer artificial electromagnetic material is shown in Fig. 1 (a) and Fig. 1 (b); Asymmetrical metallic copper resonant ring 1 and 3 is etched in the tow sides that thickness is about the PCB dielectric layer 2 of h=1.6mm periodically; The basic structural unit of two-layer artificial electromagnetic material is measure-alike; But mutual half-twist between the two-layer elementary cell, the interior external radius of asymmetric metal wire is respectively r=5.6mm and R=6.4mm, and two sections corresponding central angles of metal arc are respectively α=140 ° and β=160 °.
Fig. 2 has provided the synoptic diagram of cross polarization wave filter; Comprise the polarizer 4, novel artificial electromagnetic material structure 5 and analyzer 6; Wherein novel artificial electromagnetic material structure 5 comprises metallic copper resonant ring 1,3 and the dielectric layer 2 shown in Fig. 1 (a), and the polarizer 4 is vertical each other with the polarization direction 7,8 of analyzer 6.When novel artificial electromagnetic material structure 5 is between two mutually orthogonal polarizers 4 and 6, the cross polarization wave filter will be exported the Txy of a plurality of arrowbands.Theory and experimental result such as Fig. 3 and shown in Figure 4 based on the multimodal cross polarization wave filter of novel artificial electromagnetic material.When electromagnetic wave during perpendicular to sample surfaces incident, Txx equates with Tyy, at 4.2GHz, has occurred 3 arrowband transmission peaks Txy near 7.2GHz and the 10.5GHz, shows that our designed artificial electromagnetic material sample can accomplish the function of multimodal cross polarization filtering.The further raising of dielectric layer performance can improve the performance of multimodal cross polarization wave filter, and Fig. 5 provides the transport property of cross polarization wave filter when the loss of substrate reduces, and peak transmittance obviously improves, and the Q value of wave filter significantly promotes.
Claims (4)
1. the multimodal cross polarization wave filter based on artificial electromagnetic material comprises the polarizer, manual electromagnetic structure and the analyzer of arranging successively, and said manual electromagnetic structure comprises dielectric layer and two-layer artificial electromagnetic material layer; It is characterized in that: said two-layer artificial electromagnetic material layer lays respectively at the surface of dielectric layer both sides; Every layer of artificial electromagnetic material layer is made up of the artificial electromagnetic material elementary cell of periodic arrangement; The cellular construction of two-layer artificial electromagnetic material layer is identical, turn 90 degrees but revolve each other; The cellular construction of said artificial electromagnetic material layer comprises two sections arc length different metallic resonators, and corresponding central angle is respectively the combination of 140 degree and 160 degree or other asymmetric angles.
2. the multimodal cross polarization wave filter based on artificial electromagnetic material according to claim 1 is characterized in that: said dielectric layer adopts the PCB material, and its thickness is the millimeter magnitude.
3. the multimodal cross polarization wave filter based on artificial electromagnetic material according to claim 1 is characterized in that: dielectric layer adopts monocrystalline silicon or organic high molecular polymer dielectric material, and its thickness is the submillimeter magnitude; Described artificial electromagnetic material is the unsymmetric structure of metallic aluminium, and thickness is more than the 200nm; The cycle of artificial electromagnetic material is hundred micron dimensions.
4. the multimodal cross polarization wave filter based on artificial electromagnetic material according to claim 1 is characterized in that: described dielectric layer adopting quartz glass material, and its thickness is the submillimeter magnitude; Described artificial electromagnetic material is the unsymmetric structure of gold, and thickness is nanometer scale; The cycle of artificial electromagnetic material is a sub-micrometer scale.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399369A (en) * | 2013-07-16 | 2013-11-20 | 哈尔滨工程大学 | Transmission optical device based on artificial electromagnetic material |
| CN104020623A (en) * | 2014-06-05 | 2014-09-03 | 哈尔滨工程大学 | Background-free wave beam direction controller based on split ring structure |
| CN104347915A (en) * | 2013-07-31 | 2015-02-11 | 深圳光启创新技术有限公司 | Space angle filtering device and antenna |
| CN104466419A (en) * | 2013-09-17 | 2015-03-25 | 深圳光启创新技术有限公司 | Metamaterial and antenna |
| CN105759465A (en) * | 2016-04-01 | 2016-07-13 | 哈尔滨工程大学 | Dynamically tunable broadband polarization converter |
| CN106058477A (en) * | 2016-05-11 | 2016-10-26 | 哈尔滨工业大学深圳研究生院 | Microwave band dual-layer metal wire structural chirality super surface |
| CN106450793A (en) * | 2016-09-12 | 2017-02-22 | 电子科技大学 | Broadband selectivity wave-transparent polarization regulation electromagnetic structure |
| CN107317119A (en) * | 2017-06-16 | 2017-11-03 | 哈尔滨工程大学 | It is a kind of to polarize the relevant absorption device of controllable multiband Meta Materials |
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| US20110261441A1 (en) * | 2010-04-26 | 2011-10-27 | University Of Southampton | Spectral Filter |
| CN102291970A (en) * | 2011-05-06 | 2011-12-21 | 东南大学 | Single frequency band microwave absorber and multiple frequency band microwave absorber |
| US20120013989A1 (en) * | 2010-07-15 | 2012-01-19 | Electronics And Telecommunications Research Institute | Meta material and method of manufacturing the same |
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| US20110261441A1 (en) * | 2010-04-26 | 2011-10-27 | University Of Southampton | Spectral Filter |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399369B (en) * | 2013-07-16 | 2016-01-27 | 哈尔滨工程大学 | Based on the transmission light device of artificial electromagnetic material |
| CN103399369A (en) * | 2013-07-16 | 2013-11-20 | 哈尔滨工程大学 | Transmission optical device based on artificial electromagnetic material |
| CN104347915A (en) * | 2013-07-31 | 2015-02-11 | 深圳光启创新技术有限公司 | Space angle filtering device and antenna |
| CN104466419A (en) * | 2013-09-17 | 2015-03-25 | 深圳光启创新技术有限公司 | Metamaterial and antenna |
| CN104020623A (en) * | 2014-06-05 | 2014-09-03 | 哈尔滨工程大学 | Background-free wave beam direction controller based on split ring structure |
| CN104020623B (en) * | 2014-06-05 | 2017-01-18 | 哈尔滨工程大学 | Background-free wave beam direction controller based on split ring structure |
| CN105759465B (en) * | 2016-04-01 | 2019-05-21 | 哈尔滨工程大学 | A kind of wideband polarization converter of dynamic-tuning |
| CN105759465A (en) * | 2016-04-01 | 2016-07-13 | 哈尔滨工程大学 | Dynamically tunable broadband polarization converter |
| CN106058477A (en) * | 2016-05-11 | 2016-10-26 | 哈尔滨工业大学深圳研究生院 | Microwave band dual-layer metal wire structural chirality super surface |
| CN106058477B (en) * | 2016-05-11 | 2019-01-15 | 哈尔滨工业大学深圳研究生院 | A kind of super surface of microwave section double-level-metal cable architecture chiral |
| CN106450793A (en) * | 2016-09-12 | 2017-02-22 | 电子科技大学 | Broadband selectivity wave-transparent polarization regulation electromagnetic structure |
| CN106450793B (en) * | 2016-09-12 | 2019-08-13 | 电子科技大学 | A kind of broadband selective wave transparent polarization regulation electromagnetic structure |
| CN107317119A (en) * | 2017-06-16 | 2017-11-03 | 哈尔滨工程大学 | It is a kind of to polarize the relevant absorption device of controllable multiband Meta Materials |
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