CN102890992A - Transparent artificial electromagnetic material - Google Patents
Transparent artificial electromagnetic material Download PDFInfo
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- CN102890992A CN102890992A CN2011101200410A CN201110120041A CN102890992A CN 102890992 A CN102890992 A CN 102890992A CN 2011101200410 A CN2011101200410 A CN 2011101200410A CN 201110120041 A CN201110120041 A CN 201110120041A CN 102890992 A CN102890992 A CN 102890992A
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Abstract
The invention relates to a transparent artificial electromagnetic material which comprises at least one material sheet layer, wherein each material sheet layer comprises a sheet-like substrate and an artificial microstructure attached to the substrate; the substrate is made of transparent material; the artificial microstructure is an aluminum-doped zinc oxide film with geometrical patterns; the substrate is made of transparent material; the aluminum-doped zinc oxide film as the artificial microstructure has the characteristics of transparency and excellent electric conductivity, so that the aluminum-doped zinc oxide film can respond to visible light and further the collection, the diffusion, the deviation and the like of the visible light are caused and the application range of the artificial electromagnetic material is widened to the field from microwaves to the visible light.
Description
Technical field
The present invention relates to the artificial electromagnetic material field, more particularly, relate to a kind of transparent artificial electromagnetic material.
Background technology
Artificial electromagnetic material claims again super material, is a kind of can to the novel artificial synthetic material of electromagnetism generation response, the be comprised of substrate and the artificial micro-structural that is attached on the substrate.Because artificial micro-structural is generally certain geometric structure that has that metal wire is arranged into, therefore can produce response to electromagnetic wave, thereby make artificial electromagnetic material integral body embody the electromagnetic property that is different from substrate, such electromagnetic property can realize the irrealizable specific function of current material, electromagneticly converge, disperse etc. such as realizing, can be used on the electromagnetic communication fields such as antenna, radar.
Artificial electromagnetic material can be applied on the various electromagnetic waves in theory, but existing application is usually only in electromagnetic communication fields such as microwaves, and is inoperative to visible light, and this is that selection by substrate and artificial micro-structural limits.The problem that solution utilizes artificial electromagnetic material to converge, disperse visible light can expand to visible light frequency band with the range of application of artificial electromagnetic material.
Summary of the invention
The technical problem to be solved in the present invention is, for the defective of prior art, provides a kind of transparent artificial electromagnetic material.
The technical solution adopted for the present invention to solve the technical problems is: a kind of transparent artificial electromagnetic material is provided, comprise at least one sheet of material, each sheet of material comprises plate shape substrates and the artificial micro-structural that is attached on the described substrate, described substrate is made by transparent material, and described artificial micro-structural is the Al-Doped ZnO film with geometrical pattern.
In transparent artificial electromagnetic material of the present invention, the light transmittance of described Al-Doped ZnO film is greater than 80%.
In transparent artificial electromagnetic material of the present invention, the thickness of described Al-Doped ZnO film is between 50～1000nm.
In transparent artificial electromagnetic material of the present invention, described artificial micro-structural is " worker " font.
In transparent artificial electromagnetic material of the present invention, described artificial micro-structural is two-dimentional snowflake type or three-dimensional snowflake type.
In transparent artificial electromagnetic material of the present invention, described substrate is transparent polymer material.
In transparent artificial electromagnetic material of the present invention, described substrate is polymethyl methacrylate.
In transparent artificial electromagnetic material of the present invention, described substrate is transparent polyurethane, polyethylene, PETG or polyvinyl chloride.
In transparent artificial electromagnetic material of the present invention, the size of described artificial micro-structural is less than 1/10th of the wavelength of the incident electromagnetic wave that will respond.
Implement transparent artificial electromagnetic material of the present invention, have following beneficial effect: substrate is selected transparent material, and also has good electrical conductance transparent as the Al-Doped ZnO film of artificial micro-structural the time, therefore can produce response to visible light, thereby cause that visible light converges, disperses, deviation etc., thereby the range of application of artificial electromagnetic material is widened the visible light field from microwave.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural representation of the transparent artificial electromagnetic material of the preferred embodiment of the present invention;
Fig. 2 is the structural representation of a material cell of transparent artificial electromagnetic material shown in Figure 1;
Fig. 3 is the electromagnetic schematic diagram of transparent artificial electromagnetic material deviation shown in Figure 1.
Embodiment
The present invention relates to a kind of transparent artificial electromagnetic material, as shown in Figure 1, comprise at least one sheet of material 1, when sheet of material 1 has when a plurality of, it is superimposed as one along the x direction perpendicular to the surface.Sheet of material 1 comprises the plate shape substrates 3 and a plurality of artificial micro-structural 4 that is attached on the plate shape substrates 3 of even uniform thickness.Plate shape substrates 3 is divided into a plurality of identical side's bodily form grids virtually, each grid is a base board unit 30, and so that be attached with an artificial micro-structural 4 on each base board unit 30, then each base board unit 30 and on the artificial micro-structural 4 of adhering to is common consists of a material cell 2, whole sheet of material 1 can be regarded as the first array that is comprised of as row take the z direction as row, take the y direction a plurality of material cell 2.The square bodily form grid here, can have any size of freely dividing, the length that is preferably y, z direction among the present invention be the electromagnetic wavelength that will respond 1/10th, the length of x direction equates with the thickness of the x direction of plate shape substrates 3, therefore be attached to artificial microstructure size on the base material unit be less than incident electromagnetic wave wavelength 1/10th.Certainly, the length of its x of material cell of the present invention, y, z direction electromagnetic wavelength 1/5th to 1/2nd between all can.
The concrete structure of material cell 2 comprises a base board unit 30 and is attached to this base board unit 30 lip-deep artificial micro-structurals 4 as shown in Figure 2.Artificial micro-structural 4 is for having the film of certain geometrical pattern, and for example in the present embodiment, " worker " font that artificial micro-structural 4 is the plane comprises linear the first straight line and is vertically connected on respectively two second straight lines at the first straight line two ends.
Artificial micro-structural 4 also can be other shapes, and such as the two-dimentional snowflake type on plane, it comprises two four the second straight lines that mutually intersect vertically into first straight line of " ten " font and be vertically connected on respectively each the first straight line two ends.
Artificial micro-structural 4 also can be the three-dimensional snowflake type of solid, comprises three six roots of sensation the second straight lines of vertically and mutually sending in twos the first straight line of any and being vertically connected on respectively each the first straight line two ends.Three-dimensional artificial micro-structural 4 is to be attached to substrate 3 inside by certain processing technology.
Certainly, artificial micro-structural 4 of the present invention also has multiple implementation, thereby as long as by certain geometric figure that has that can consist of the film silk thread that the material that the electromagnetic field generation responds is made electromagnetic field generation response is namely changed the structure of electromagnetic nature, artificial micro-structural 4 of the present invention is attached to substrate 3 surfaces upward or embedding substrate 3 inside form material cell 2 of the present invention thereby all can be used as.
Each base board unit 30 and on artificial micro-structural 4 jointly determined dielectric constant and the magnetic permeability of the material cell 2 that they consist of, according to formula
As can be known, known dielectric constant and magnetic permeability can obtain refractive index n, and the expression of refractive index size is to the influence degree of Electromagnetic Wave Propagation direction.Therefore, the shape by designing each artificial micro-structural 4, size etc. change dielectric constant and the magnetic permeability of each material cell 2, and then obtain specific refraction index profile, can realize electromagnetic deviation, converge, disperse etc.
Existing artificial electromagnetic material, its artificial micro-structural 4 is selected the non-ferrous metal of the materials such as silver, copper usually, because the metals such as silver, copper are good conductor, form the surface plasma bulk effect in its metal structure surface, good conductor can excite and strengthen this effect as much as possible, thereby sensitiveer to electromagnetic response, effect is stronger.
3 needs of substrate select those that electromagnetic wave is not had response, do not affect electromagnetic wave or the impact little material of trying one's best, and namely dielectric constant and magnetic permeability must be as far as possible close to 1, and the common Ceramics of existing artificial electromagnetic material is as baseplate material.
Under the acting in conjunction of artificial micro-structural 4 and base board unit 30, artificial electromagnetic material has embodied the characteristic that general nature circle material does not have aspect electromagnetic property, and such as material with negative refractive index, wave beam converges, wave beam deflection, the characteristics such as beam parallel.And by these physical characteristics, extending a lot of new application, such as communication, optics, device miniaturization, the fields such as detection.
But because artificial micro-structural 4 and substrate 3 are opaque material, therefore existing artificial electromagnetic material is mainly used in microwave band, can not the generation effect to visible light.As herein described transparent, refer to that light transmittance reaches more than 80%.
One of innovative point of the present invention is, selects transparent material as substrate 3, such as transparent organic polymer material etc.In the preferred embodiment, substrate 3 of the present invention is selected transparent organic glass, i.e. polymethyl methacrylate, the English PMMA that is called for short.Other transparent organic polymer materials that can be used as substrate 3 can also be transparent polyurethane, polyethylene (PE), low density polyethylene (LDPE) (LDPE), polypropylene (PP), PETG (PET), polyvinyl chloride (PVC) etc.
The dielectric constant of these materials is all not high, be selected between 1～5, and magnetic permeability all is 1 basically, meets as making demands before the substrate 3.Simultaneously, these materials are by the manufacturing process of prior art, all can realize transparent or semitransparent so that visible light sees through.
Two of innovative point of the present invention is, further, artificial micro-structural 4 is also selected transparent or semitransparent material, and the present invention selects Al-Doped ZnO film.
Al-Doped ZnO (being abbreviated as ZAO) film, doped chemical Al gets in the ZnO system.ZnO film has numerous crystal grain of C axle preferential growth, and each crystal grain is to be the plumbous zinc ore structure of well-grown hexagon.ZnO crystal is the hexagonal closs packing of oxygen and reverse nested the forming of hexagonal closs packing of zinc.The film of this structure has transparent conductivity, but resistance value is high.After the doped with Al, can form the ZAO film in ZnO, resistivity reduces greatly, thereby has good electric conductivity, and the stability of film also improves greatly simultaneously.
Al-Doped ZnO film usually between 50～1000nm, is clear, colorless at thickness, and light transmittance can reach 90%.Owing to having a good electricity conductibility, can be used as therefore that conductive film substitutes that silver, copper are made artificial micro-structural in order to electromagnetic wave produced respond, simultaneously, good light transmission can be widened the application of artificial electromagnetic material to visible light by microwave regime.
When the manufacture of intraocular electromagnetic material; make first the substrate 3 of being made by macromolecular materials such as transparent organic glass; enclose layer protecting film at substrate 3; and have on the diaphragm shape identical with artificial micro-structural engrave the hole; with vapour deposition method ZAO is deposited on the diaphragm; and the ZAO that engraves bore portion will be attached directly on the substrate 3; then throw off diaphragm; can obtain being attached with the substrate of the artificial micro-structural of ZAO film; also namely make a sheet of material 1, at last a plurality of sheet of material 1 are encapsulated into a complete artificial electromagnetic material.
Certainly, Al-Doped ZnO film of the present invention also can be to be attached to by other means to form artificial micro-structural 4 on the base material 3, and the method for preparing Al-Doped ZnO film of prior art is all in the present invention available, in order to prepare the artificial micro-structural of Al-Doped ZnO.
Because substrate 3 and artificial micro-structural 4 are transparent material, therefore such artificial electromagnetic material can be used for the visible light field, has expanded greatly application and the scope of artificial electromagnetic material, and important scientific research value and economic worth are arranged.
For example, design a hollow man geosynthetics, such as Fig. 1, shown in Figure 3, to be listed as artificial micro-structural all identical with each of y direction in the x-direction, and in the z-direction each is listed as its shape geometric similarity of artificial micro-structural, and size reduces gradually, so that refractive index is constant along x, y direction, and refractive index in the z-direction reduces gradually.The sheet of material 1 that satisfies such refraction index profile can realize electromagnetic deviation, as shown in Figure 3, incides the electromagnetic wave the hollow man geosynthetics from the little place of refractive index, will be to the large local deviation of refractive index.
Certainly, by designing the artificial micro-structural 4 of each material cell 2, can realize various refraction index profile, and then realize the achieved electromagnetic wave deflection of common artificial electromagnetic material, other functions such as disperse.But the present invention is owing to adopting transparent substrate 3 and artificial micro-structural 4, electromagnetic wave is widened visible light frequency band by microwave band, it is the progress of revolution, be conducive to substitute traditional optical element such as convex lens, concave mirror etc., and sheet of material 1 of the present invention is surface plate, need not special design convex surface or concave surface etc. complex-curved, greatly simplified design and the course of processing, can effectively reduce design, manufacturing cost.
Therefore; the above is described embodiments of the invention by reference to the accompanying drawings; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than restrictive, those of ordinary skill in the art is not breaking away from the scope situation that aim of the present invention and claim protect under enlightenment of the present invention; also can make a lot of forms, these all belong within the protection of the present invention.
Claims (10)
1. transparent artificial electromagnetic material, comprise at least one sheet of material, each sheet of material comprises plate shape substrates and the artificial micro-structural that is attached on the described substrate, it is characterized in that, described substrate is made by transparent material, and described artificial micro-structural is the Al-Doped ZnO film with geometrical pattern.
2. transparent artificial electromagnetic material according to claim 1 is characterized in that, the light transmittance of described Al-Doped ZnO film is greater than 80%.
3. transparent artificial electromagnetic material according to claim 1 is characterized in that, the thickness of described Al-Doped ZnO film is between 50～1000nm.
4. transparent artificial electromagnetic material according to claim 1 is characterized in that, the geometrical pattern of described artificial micro-structural is " worker " font.
5. transparent artificial electromagnetic material according to claim 1 is characterized in that, the geometrical pattern of described artificial micro-structural is two-dimentional snowflake type or three-dimensional snowflake type.
6. transparent artificial electromagnetic material according to claim 1 is characterized in that, described substrate is transparent polymer material.
7. transparent artificial electromagnetic material according to claim 6 is characterized in that, described substrate is polymethyl methacrylate.
8. transparent artificial electromagnetic material according to claim 6 is characterized in that, described substrate is transparent polyurethane, polyethylene.
9. transparent artificial electromagnetic material according to claim 8 is characterized in that, described substrate is PETG or polyvinyl chloride.
10. transparent artificial electromagnetic material according to claim 1 is characterized in that, the size of described artificial micro-structural is less than 1/10th of the wavelength of the incident electromagnetic wave that will respond.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110120041.0A CN102890992B (en) | 2011-05-10 | 2011-05-10 | A kind of transparent artificial electromagnetic material |
| US13/635,863 US9268062B2 (en) | 2011-04-12 | 2011-10-27 | Artificial electromagnetic material |
| EP11860700.1A EP2544029B1 (en) | 2011-04-12 | 2011-10-27 | Artificial dielectric material |
| PCT/CN2011/081389 WO2012139368A1 (en) | 2011-04-12 | 2011-10-27 | Artificial dielectric material |
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| CN201110120041.0A CN102890992B (en) | 2011-05-10 | 2011-05-10 | A kind of transparent artificial electromagnetic material |
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| CN102890992A true CN102890992A (en) | 2013-01-23 |
| CN102890992B CN102890992B (en) | 2015-10-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048028A (en) * | 2015-07-23 | 2015-11-11 | 北京交通大学 | Terahertz filter and manufacturing method thereof |
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| CN101597810A (en) * | 2009-07-03 | 2009-12-09 | 东华大学 | A kind of preparation method of polypropylene/doped oxide composite functional fiber |
| CN101694558A (en) * | 2009-10-21 | 2010-04-14 | 电子科技大学 | Metamaterial structure for modulating terahertz wave |
| CN201450116U (en) * | 2009-07-01 | 2010-05-05 | 东南大学 | Lens antenna with wide frequency band, high gain and good directionality |
| US20100271692A1 (en) * | 2009-04-08 | 2010-10-28 | New Jersey Institute Of Technology | Metamaterials with terahertz response and methods of making same |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100271692A1 (en) * | 2009-04-08 | 2010-10-28 | New Jersey Institute Of Technology | Metamaterials with terahertz response and methods of making same |
| CN201450116U (en) * | 2009-07-01 | 2010-05-05 | 东南大学 | Lens antenna with wide frequency band, high gain and good directionality |
| CN101597810A (en) * | 2009-07-03 | 2009-12-09 | 东华大学 | A kind of preparation method of polypropylene/doped oxide composite functional fiber |
| CN101694558A (en) * | 2009-10-21 | 2010-04-14 | 电子科技大学 | Metamaterial structure for modulating terahertz wave |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105048028A (en) * | 2015-07-23 | 2015-11-11 | 北京交通大学 | Terahertz filter and manufacturing method thereof |
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