CN102683808B - Metamaterial - Google Patents
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- CN102683808B CN102683808B CN201110066112.3A CN201110066112A CN102683808B CN 102683808 B CN102683808 B CN 102683808B CN 201110066112 A CN201110066112 A CN 201110066112A CN 102683808 B CN102683808 B CN 102683808B
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Abstract
The embodiment of the invention provides a metamaterial capable of splitting specific single-frequency electromagnetic wave beam in multi-frequency electromagnetic waves. The metamaterial comprises a base plate and a plurality of artificial micro structure units arranged on the base plate, wherein each artificial micro structure unit comprises at least one artificial micro structure, the metamaterial can generate different electromagnetic responses on incidence electromagnetic waves at different frequencies, so the deflection difference of the electromagnetic waves at different frequencies can be caused, the electromagnetic waves is subjected to chromatic dispersion, and the electromagnetic wave beam splitting is realized.
Description
[technical field]
The present invention relates to Meta Materials field, particularly relate to a kind of can by the Meta Materials of the specific single-frequency electromagnetic wave beam splitting in multifrequency electromagnetic wave.
[background technology]
Meta Materials refers to some artificial composite structures with the extraordinary physical property not available for natural material or composite material; By the structurally ordered design on the key physical yardstick of material, the restriction of some apparent natural law can be broken through, thus obtain the meta-materials function exceeding the intrinsic common character of nature.
Meta Materials is made up of medium substrate and the multiple man-made microstructure unit be arranged on substrate, and wherein, each man-made microstructure comprises a man-made microstructure; Each man-made microstructure size is generally less than 1/10 wavelength, and it has electroresponse and/or magnetic response to extra electric field and/or magnetic field, thus has and show effective dielectric constant and/or equivalent permeability.The effective dielectric constant of man-made microstructure and equivalent permeability are determined by its topological structure and physical dimension parameter, can artificially design and control.Further, man-made microstructure can have the anisotropic electromagnetic parameter of artificial design.
Electromagnetic wave (also known as electromagnetic radiation) is by in-phase oscillation and mutually perpendicular electric field and magnetic field are moved with the form of ripple in space, the plane that its direction of propagation is formed perpendicular to electric field and magnetic field, effectively transferring energy and momentum.Electromagnetic radiation according to frequency categorization, from low frequency to high-frequency, can include radio wave, microwave, infrared ray, visible ray, ultraviolet light, X-ray and gamma ray etc.The electromagnetic radiation that human eye can receive, wavelength between 380 to 780 nanometers, is called visible ray greatly.As long as self-temperature is greater than the object of absolute zero, can electromagnetic radiation-emitting, and there is not the object that temperature is equal to or less than absolute zero in the world.
The dispersion of light refers to that polychromatic light is decomposed into monochromatic light and forms the phenomenon of spectrum.The dispersion of light can utilize prism or grating etc. to realize as the instrument of " dispersion system ".After polychromatic light enters prism, because it has different refractivity to the light of various frequency, there is deviation in various degree the direction of propagation of various coloured light, and the thus just dispersion separately when leaving prism, forms spectrum.A few train wave is propagated in medium, and their frequency is different, and propagation velocity is also different, this phenomenon dispersion, in physics, every with velocity of wave, the relevant phenomenon of wavelength, be called dispersion; Electromagnetic dispersion refers to that the multifrequency electromagnetic wave comprising multiple frequency is decomposed into several single-frequency electromagnetic wave, and multifrequency electromagnetic wave is when by medium, because medium is different to the electromagnetic refractive index of each single-frequency, so multifrequency electromagnetic wave can produce dispersion; But general, multifrequency electromagnetic wave is the electromagnetic wave of cline frequency, is namely the electromagnetic wave of certain frequency band, and the electromagnetic frequency of each single-frequency all gradually changes, so when by medium, deflection angle also gradually changes.
In prior art, energy dispersion multifrequency electromagnetic wave, but be small for the relative change between each single-frequency electromagnetic wave, the electromagnetic effect of beam splitting multifrequency can not be reached, if namely need the single-frequency electromagnetic wave beam splitting by some in a multifrequency electromagnetic wave or certain several characteristic frequency, prior art is difficult to accomplish.
[summary of the invention]
The invention provides and a kind ofly by the Meta Materials of the specific single-frequency electromagnetic wave beam splitting in multifrequency electromagnetic wave, can make single-frequency electromagnetic wave beam splitting that is some in a multifrequency electromagnetic wave or certain several characteristic frequency.
A kind of Meta Materials, it is characterized in that, this Meta Materials comprises substrate and multiple man-made microstructure unit be arranged on substrate, and this man-made microstructure unit has at least one man-made microstructure.
Meta Materials provided by the invention, by designing the different man-made microstructure of multiple resonance frequency, thus when making multifrequency electromagnetic wave by Meta Materials, can make to produce resonance with the single-frequency electromagnetic wave of the resonance frequency same frequency of man-made microstructure in this multifrequency electromagnetic wave, there is dispersion, thus reach the object of the single-frequency electromagnetic wave beam splitting of some in a multifrequency electromagnetic wave or certain several characteristic frequency.
[accompanying drawing explanation]
Fig. 1 is the schematic diagram of the embodiment of the present invention one Meta Materials;
Fig. 2 is the schematic diagram of the man-made microstructure forming Meta Materials in the embodiment of the present invention one;
Fig. 3 is the schematic diagram of the embodiment of the present invention two Meta Materials;
Fig. 4 is the schematic diagram of the man-made microstructure forming Meta Materials in the embodiment of the present invention two;
Fig. 5 is the schematic diagram of another man-made microstructure forming Meta Materials in the embodiment of the present invention two;
Fig. 6 is the schematic diagram of the man-made microstructure forming Meta Materials in application examples of the present invention;
Fig. 7 is the schematic diagram of application examples Meta Materials of the present invention.
[embodiment]
Embodiments provide a kind of Meta Materials, this Meta Materials comprises substrate and multiple man-made microstructure unit composition with one or more resonance point be arranged on substrate.Be described in detail below.
Refer to Fig. 1, Fig. 2, in the embodiment of the present invention, a kind of first embodiment of Meta Materials comprises:
As shown in Figure 1, Meta Materials 11 is made up of substrate 12 and multiple man-made microstructure unit 13 be uniformly distributed on the substrate 12, and wherein, man-made microstructure unit 13 has at least one man-made microstructure.As shown in the man-made microstructure 21 in Fig. 2 and man-made microstructure 22; Wherein metal structure 21 is different with the resonance frequency of man-made microstructure 22, namely respectively has a resonance point;
Man-made microstructure is combined with substrate can be equivalent to LC oscillating circuit, electromagnetic resonance can be there is when electromagnetic wave incident, and different electromagnetic responses is produced to the electromagnetic wave of different frequency, when electromagnetic wave generation resonance, because the electromagnetic deviation of different frequency is different, so electromagnetic wave dispersion can occur, thus electromagnetic wave beam splitting can be made.
In the present embodiment, by designing the different man-made microstructure of multiple resonance frequency, thus when making multifrequency electromagnetic wave by Meta Materials, can make to produce resonance with the single-frequency electromagnetic wave of the resonance frequency same frequency of man-made microstructure in this multifrequency electromagnetic wave, there is dispersion, thus reach the object of the single-frequency electromagnetic wave beam splitting of some in a multifrequency electromagnetic wave or certain several characteristic frequency.
Refer to Fig. 3, Fig. 4, Fig. 5, in the embodiment of the present invention, a kind of second embodiment of Meta Materials comprises:
As shown in Figure 3, Meta Materials 31 is made up of substrate 32 and multiple man-made microstructure unit 33 be evenly distributed on basic 32, wherein, man-made microstructure unit 33 comprises a man-made microstructure 34, as shown in Figure 4, man-made microstructure has a resonance point, namely has a resonance frequency, when a branch of comprise the multifrequency electromagnetic wave identical with the resonance frequency of man-made microstructure unit 33 by this Meta Materials time, this unifrequency electromagnetic wave generation dispersion; Wherein, the resonance frequency of man-made microstructure is that the frequency corresponding according to the resonance point pre-set is arranged, changed the resonance frequency of man-made microstructure by the dielectric constant and magnetic permeability changing man-made microstructure, the frequency that the resonance point pre-set is corresponding is that the electromagnetic frequency of single-frequency making it generation dispersion is as required determined;
Wherein, man-made microstructure unit can also comprise multiple man-made microstructure, as shown in Figure 5, man-made microstructure unit 50 comprises man-made microstructure 51, man-made microstructure 52 and man-made microstructure 53, the resonance frequency of each man-made microstructure is not identical, and namely this man-made microstructure unit 50 has three different resonance points; When a branch of comprise the identical multifrequency electromagnetic wave of the frequency corresponding with the resonance point of man-made microstructure unit 50 by this Meta Materials time, because the electromagnetic refractive index of different unifrequency is different, so the plurality of unifrequency electromagnetic wave generation dispersion, thus reach the object of the single-frequency electromagnetic wave beam splitting of some in a multifrequency electromagnetic wave or certain several characteristic frequency; Wherein, the resonance frequency of man-made microstructure is that the frequency corresponding according to the resonance point pre-set is arranged, change the resonance frequency of man-made microstructure by changing the dielectric constant of man-made microstructure and magnetic permeability, the frequency that the resonance point pre-set is corresponding be make it as required to occur dispersion the electromagnetic frequency of single-frequency determine;
The man-made microstructure of composition Meta Materials is the periodic array in uniformity in space; Man-made microstructure has the attachment metal wire on the substrate of given shape, and described shape is non-rotating 90 degree of symmetrical patterns;
Should in use-case, by designing the different man-made microstructure of multiple resonance frequency, thus when making multifrequency electromagnetic wave by Meta Materials, can make to produce resonance with the single-frequency electromagnetic wave of the resonance frequency same frequency of man-made microstructure in this multifrequency electromagnetic wave, there is dispersion, thus reach the object of the single-frequency electromagnetic wave beam splitting of some in a multifrequency electromagnetic wave or certain several characteristic frequency.
Here is an application examples of the present invention, and namely composition graphs 6, Fig. 7 are described in detail a kind of Meta Materials of the present invention, comprising:
If need to separate 55G hertz, 70G hertz and 90G hertz three beams single-frequency electromagnetic wave in the multifrequency electromagnetic wave of 1G hertz to 100G hertz, we need the single-frequency electromagnetic wave generation resonance making these three frequencies, cause dispersion;
First, need the man-made microstructure unit that design one is made up of three man-made microstructure, and the resonance frequency of these three man-made microstructure is identical with needing the electromagnetic frequency of three beams single-frequency of beam splitting respectively; As shown in Figure 6, the man-made microstructure unit 60 that we form for three snowflake types, man-made microstructure unit 60 is made up of man-made microstructure 61, man-made microstructure 62 and man-made microstructure 63, wherein, the dielectric constant of man-made microstructure 61, man-made microstructure 62 and man-made microstructure 63 is not identical with magnetic permeability, thus making the resonance frequency of these three man-made microstructure not identical: the resonance frequency of man-made microstructure 61 is 55G hertz, the resonance frequency of man-made microstructure 62 is 70G hertz, and the resonance frequency of man-made microstructure 63 is 90G hertz; Man-made microstructure unit is evenly distributed on substrate, constitutes the Meta Materials in the embodiment of the present invention;
Make electromagnetic wave dispersion, need electromagnetic frequency identical with the resonance frequency of man-made microstructure, resonance occurs, and the resonance frequency of man-made microstructure can be changed by the dielectric constant and magnetic permeability changing man-made microstructure artificially.
As shown in Figure 7, substrate 71 is uniformly distributed multiple man-made microstructure unit 60, each artificial microstructure unit is made up of three man-made microstructure, the electromagnetic frequency band of multifrequency is between 1G hertz to 100G hertz, when this multifrequency electromagnetic wave is by this Meta Materials, the single-frequency electromagnetic wave of 55G hertz, the single-frequency electromagnetic wave of 70G hertz and the electromagnetic frequency of single-frequency of 90G hertz are identical with the frequency of three man-made microstructure of composition man-made microstructure unit 60 respectively, because the electromagnetic refractive index of different unifrequency is different, so there is resonance with corresponding man-made microstructure in above-mentioned three single-frequency electromagnetic waves, make multifrequency electromagnetic wave generation dispersion, thus make frequency be 55G hertz, the three beams single-frequency electromagnetic deviation angle of 70G hertz and 90G hertz there occurs very large change, thus by obvious beam splitting.
Should in use-case, by designing the different man-made microstructure of multiple resonance frequency, thus when making multifrequency electromagnetic wave by Meta Materials, can make to produce resonance with the single-frequency electromagnetic wave of the resonance frequency same frequency of man-made microstructure in this multifrequency electromagnetic wave, there is dispersion, thus reach the object of the single-frequency electromagnetic wave beam splitting of some in a multifrequency electromagnetic wave or certain several characteristic frequency.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, also can make a lot of form, these all belong within protection of the present invention.
Claims (5)
1. a Meta Materials, it is characterized in that, described Meta Materials comprises substrate and multiple identical man-made microstructure unit be arranged on substrate, each artificial microstructure unit is made up of the man-made microstructure that multiple resonance frequency is not identical, described man-made microstructure is the attachment metal wire on the substrate with given shape, described shape is non-rotating 90 degree of symmetrical patterns, and multiple man-made microstructure of each artificial microstructure unit are arranged side by side.
2. Meta Materials according to claim 1, is characterized in that, described man-made microstructure unit comprises at least one resonance frequency.
3. Meta Materials according to claim 2, is characterized in that, the frequency corresponding according to the resonance point pre-set, and arranges the resonance frequency of each described man-made microstructure.
4. Meta Materials according to claim 3, is characterized in that, the described resonance frequency arranging each described man-made microstructure comprises:
The frequency of described man-made microstructure is set by the dielectric constant and magnetic permeability changing described man-made microstructure.
5. Meta Materials according to claim 1, is characterized in that, the periodic array of described multiple man-made microstructure in space in uniformity.
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| CN201110066112.3A CN102683808B (en) | 2011-03-18 | 2011-03-18 | Metamaterial |
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| CN201110066112.3A CN102683808B (en) | 2011-03-18 | 2011-03-18 | Metamaterial |
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| CN102683808B true CN102683808B (en) | 2015-04-22 |
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| CN103715516B (en) * | 2014-01-22 | 2016-07-06 | 中国科学院电子学研究所 | Frequency scanning reflector antenna and diffracted wave Enhancement Method based on plane diadactic structure |
| CN104638329B (en) * | 2015-01-22 | 2017-10-20 | 复旦大学 | A kind of coupler of the surface phasmon based on special interface |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20050200540A1 (en) * | 2004-03-10 | 2005-09-15 | Isaacs Eric D. | Media with controllable refractive properties |
| CN101587990A (en) * | 2009-07-01 | 2009-11-25 | 东南大学 | Broad band cylindrical lens antenna based on artificial electromagnetic materials |
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| CN101765358B (en) * | 2008-12-25 | 2012-05-30 | 西北工业大学 | Meta-material absorber based on dendritic structure |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050200540A1 (en) * | 2004-03-10 | 2005-09-15 | Isaacs Eric D. | Media with controllable refractive properties |
| CN101587990A (en) * | 2009-07-01 | 2009-11-25 | 东南大学 | Broad band cylindrical lens antenna based on artificial electromagnetic materials |
Non-Patent Citations (1)
| Title |
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| 安兆卫,王明皓.Jerusalem十字架型FSS的仿真设计.《飞机设计》.2010, * |
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Effective date of registration: 20160330 Address after: 518057 Guangdong City, Nanshan District province high tech Zone in the middle of a high tech building, building No. 2, No. 9, building Patentee after: Shenzhen Guangqi Innovative Technology Co., Ltd. Address before: 518057 Guangdong city of Shenzhen province Nanshan District New South Hing a City University Hong Kong No. 8 and building 3 Patentee before: Shenzhen Kuang-Chi Institute of Advanced Technology Patentee before: Shenzhen Kuang-Chi Innovation Technology Co., Ltd. |