CN103399369A - Transmission optical device based on artificial electromagnetic material - Google Patents
Transmission optical device based on artificial electromagnetic material Download PDFInfo
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- CN103399369A CN103399369A CN2013102982058A CN201310298205A CN103399369A CN 103399369 A CN103399369 A CN 103399369A CN 2013102982058 A CN2013102982058 A CN 2013102982058A CN 201310298205 A CN201310298205 A CN 201310298205A CN 103399369 A CN103399369 A CN 103399369A
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Abstract
The invention provides a transmission optical device based on an artificial electromagnetic material. The transmission optical device comprises a first metallic structural layer, a spacing layer and a second metallic structural layer, wherein the spacing layer is made from a transparent photosensitive polymer with a thickness in a 100nm (Nanometers) order of magnitude; the first metallic structural layer and the second metallic structural layer are respectively arranged on surfaces at the two sides of the spacing layer, both the first metallic structural layer and the second metallic structural layer are formed by basic units periodically arranged, and the thickness of either the first metallic structural layer or the second metallic structural layer is 20-60nm; and the basic units of the first metallic structural layer and the second metallic structural layer are in the same structural shape. The transmission optical device provided by the invention has strong linear polarization conversion characteristics in two wave bands and realizes the unidirectional transmission of the two wave bands.
Description
Technical field
The present invention relates to a kind of electromagnetic transmission control unit (TCU) spare, relate in particular to a kind of device of transmission light based on artificial electromagnetic material.
Background technology
The super material of artificial electromagnetic (Metamaterials) is having sub-wavelength structure and presenting the material of the extraordinary character that natural material do not possess of artificial design, the extensive concern that the physical property of its unique novelty and tempting application prospect have obtained international academic community, by U.S.'s " science " magazine, be chosen as one of 2003 annual ten large technological achievements, super material has caused the photonic crystal research boom of another artificial novel medium afterwards.
In Metamaterials, " meta " is equivalent to English " beyond ", means and surmounts, and the yardstick of its structural unit, in the sub-wavelength magnitude, can be realized the unexistent electromagnetic property of natural material, as negative refraction, perfect lens, stealthy cape etc.Chirality (Chirality) is that the symmetric a kind of pure geometry character of object is described, and refers to that object structures self lacks geometrical symmetry, and typical Chiral Media has quartz, glucose etc.As far back as 19 beginnings of the century, the researcher has just found the plane of polarization of the rotatable polarized light of quartz wafer, has optical activity, is called again optical rotation phenomenon.In recent years, in order to describe the optical property of 2 dimensional plane structures, introduced the concept of 2 dimension chiralitys: if a planar object can not overlap with its mirror image by the rotation in plane and displacement, namely it does not have the line symmetry in the plane of structure, this object is chiral structure, has spiral character.The research contents in electromagnetism field has greatly been enriched in the appearance of the super material of artificial electromagnetic, and for example, chirality there will be huge rotation effect, electromagnetic asymmetric transmission etc. after the super material of artificial electromagnetic is combined.
Asymmetric transport phenomena, for the direction regulation and control of optical band polarized light transmission provide new approach, is significant to realizing the super material function devices such as optical band isolator, optical band diode, polarization converter device.Since the one-way transmission phenomenon of chiral material was found, correlative study had been subject to extensive concern.At present, in the one-way transmission of single band, single polarization state, and polarization conversion efficiency is not high based on the optical device study limitation of artificial electromagnetic material.
Summary of the invention
The invention provides a kind of device of transmission light based on artificial electromagnetic material, this transmission light device can be realized the transmission of two waveband.
On the one hand, provide a kind of device of transmission light based on artificial electromagnetic material, having comprised: first layer metal structural sheet, wall and second layer metal structural sheet; Wall is transparent photopolymer, and thickness is hundred nanometer scale; First layer metal structural sheet and second layer metal structural sheet lay respectively at the surface of wall both sides, first layer metal structural sheet and second layer metal structural sheet form by the elementary cell of periodic arrangement, and the thickness of first layer metal structural sheet and second layer metal structural sheet is 20-60nm; The first layer metal structural sheet is identical with the planform of the elementary cell of second layer metal structural sheet.
Preferably, first layer metal structural sheet and second layer metal structural sheet adopt precious metal material Noble metal.
Preferably, precious metal material comprises: golden or silver-colored.
Preferably, identical the comprising of planform of first layer metal structural sheet and the elementary cell of second layer metal structural sheet: the structure of the elementary cell of first layer metal structural sheet and second layer metal structural sheet is the structure of two I types.
Preferably, identical the comprising of planform of first layer metal structural sheet and the elementary cell of second layer metal structural sheet: the planform of the elementary cell of first layer metal structural sheet and second layer metal structural sheet is continuously two I types, the first layer metal structural sheet is identical with the physical dimension of the elementary cell of second layer metal structural sheet, and the rotation angle between the elementary cell of first layer metal structural sheet and the elementary cell of second layer metal structural sheet is 90 degree.
Preferably, every layer of metal construction thicknesses of layers of first layer metal structural sheet and second layer metal structural sheet is 20-60nm and comprises: every layer of metal construction thicknesses of layers of first layer metal structural sheet and second layer metal structural sheet is 50nm.
Preferably, above-mentioned device also comprises: the infrared transparent medium substrate, wherein, infrared transparent medium substrate and wall lay respectively at the both sides of the first structured metal layer.
Preferably, the material of infrared transparent medium substrate is quartz glass.
Above-mentioned device can be directly uses at free space, also can be placed on the infrared transparent medium substrate material such as quartz glass and use.
In the present invention, the cycle of artificial electromagnetic material elementary cell is ρ, and the live width of metal construction is w, and space layer is t, and above-mentioned device can be operated in infrared band.
By such scheme, the invention provides the one-way transmission optical device of a kind of two waveband based on artificial electromagnetic material, biorthogonal polarization state, by in designed double-deck chiral structure, adding slit, realize the linear polarization one-way transmission of two waveband.This two waveband one-way transmission device has simple structure, manufactures the advantages such as simple, cheap, and the one-way transmission phenomenon of optical band linearly polarized light conversion clearly, has realized the two waveband one-way transmission of optical band for the biorthogonal polarization state effectively.
Two waveband one-way transmission optical device proposed by the invention has very strong linear polarization conversion dichroism, and double-deck chiral structure has been realized the one-way transmission of optical band linearly polarized light conversion.This device can be realized light wave isolator or light wave diode, and will be significant to the development of infrared waves artificial electromagnetic material function element.
The accompanying drawing explanation
Fig. 1 is the perspective view according to the two waveband one-way transmission optical device S of the embodiment of the present invention;
Fig. 2 is the two waveband one-way transmission optical device S(front according to the embodiment of the present invention) and elementary structure parameter;
Fig. 3 is the principle of work schematic diagram according to the two waveband one-way transmission optical device S of the embodiment of the present invention;
Fig. 4 be according to the embodiment of the present invention two waveband one-way transmission optical device S forward transmission amplitude (
) curve;
Fig. 5 be according to the embodiment of the present invention the reverse transmission amplitude of two waveband one-way transmission optical device S (
) curve;
Fig. 6 is the asymmetric transmission coefficient curve according to the two waveband one-way transmission optical device S of the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, for example the present invention is done to more detailed description.
Embodiment 1:
As shown in Figure 1-2, two waveband one-way transmission optical device S comprises wall 2 and metal material layer 1,3 to embodiments of the present invention; Wall, between metal material layer 1 and 3, adopts photopolymer (PC403), for support metal material layer 1 and 3, and its thickness t=50nm; Metal material layer 1 and 3 lays respectively at the surface of wall both sides, and every layer of continuously two I type metal material layer elementary cell by periodic arrangement form, and the parameter of metal material layer elementary cell is as follows, cycle ρ=1200nm, the width w=200nm of metal wire, length l 1=495nm, l2=400nm, l3=990nm, b=210nm, t1=t2=50nm, wherein, t1 is the thickness of metal material layer 1, and t2 is the thickness of metal material layer 3.Metal material layer 1 is the first layer metal structural sheet, and metal material layer 3 is the second layer metal structural sheet.It should be noted that, above-mentioned size is only a kind of preferred scheme, the protection domain that is not intended to limit the present invention.Those skilled in the art can expect, similarly other sizes also can realize the present invention, and for example, the thickness of the thickness of metal material layer 1 and metal material layer 3 can be 20-60nm.Device in the present embodiment can use at free space.
Below 3 further illustrate embodiment by reference to the accompanying drawings again, at first for unidirectional transmission unit S arranges an XYZ coordinate axle as work space, Z axis is perpendicular to the surface of unidirectional transmission unit.As shown in Fig. 3 (a), after the linearly polarized light 4 of directions X polarization impinged perpendicularly on above-mentioned asymmetric transmitter surface along the Z axis forward, transmitted light was 5.Make it along the Z axis negative sense, impinge perpendicularly on above-mentioned asymmetric transmitter surface, transmitted light is 6, as Fig. 3 (b) again.Calculate respectively its transmissivity
(transmitted wave amplitude/incident wave amplitude), subscript i, j represent respectively the polarization state of incident light and transmitted light, subscript d represents the wave vector direction of incident light, along the Z axis negative sense be+, the Z axis forward is-.Two waveband one-way transmission optical device S forward transmission amplitude (
) curve as shown in Figure 4, as can be seen from the figure,
With
Reach respectively extreme value, the polarization conversion degree is the highest.The reverse transmission amplitude of two waveband one-way transmission optical device S (
) curve as shown in Figure 5, as can be seen from the figure, at 103.76THz and 146.72THz,
With
Reach respectively extreme value, the polarization conversion degree is the highest, thereby realizes the transmission of two waveband Unidirectional light.Fig. 6 is the asymmetric transmission coefficient curve of two waveband one-way transmission optical device S,
By the scheme of the present embodiment, can realize the two waveband one-way transmission.
Embodiment 2:
The present embodiment provides a kind of two waveband one-way transmission optical device, this device is to improve on embodiment 1, one-piece construction in embodiment 1 is placed in the infrared transparent substrate, that is, infrared transparent medium substrate and described wall lay respectively at the both sides of described the first structured metal layer.This device also can be realized the Unidirectional light transmission of two waveband, dual-polarization state (X and Y) at infrared band.Preferably, the material of this infrared transparent substrate is quartz glass.
Claims (8)
1. the device of the transmission light based on artificial electromagnetic material, is characterized in that, comprising: first layer metal structural sheet, wall and second layer metal structural sheet; Described wall is transparent photopolymer, and thickness is hundred nanometer scale; Described first layer metal structural sheet and described second layer metal structural sheet lay respectively at the surface of described wall both sides, described first layer metal structural sheet and described second layer metal structural sheet form by the elementary cell of periodic arrangement, and the thickness of described first layer metal structural sheet and described second layer metal structural sheet is 20-60nm; Described first layer metal structural sheet is identical with the planform of the elementary cell of described second layer metal structural sheet.
2. the device of the transmission light based on artificial electromagnetic material according to claim 1, it is characterized in that: the material of described first layer metal structural sheet and described second layer metal structural sheet is precious metal material.
3. the device of the transmission light based on artificial electromagnetic material according to claim 2, it is characterized in that: described precious metal material comprises: golden or silver-colored.
4. the described device of transmission light based on artificial electromagnetic material of according to claim 1 to 3 any one is characterized in that: identical the comprising of planform of described first layer metal structural sheet and the elementary cell of described second layer metal structural sheet: the structure of the elementary cell of described first layer metal structural sheet and described second layer metal structural sheet is the structure of two I types.
5. the described device of transmission light based on artificial electromagnetic material of according to claim 1 to 3 any one, it is characterized in that: identical the comprising of planform of described first layer metal structural sheet and the elementary cell of described second layer metal structural sheet: the planform of the elementary cell of described first layer metal structural sheet and described second layer metal structural sheet is continuously two I types, described first layer metal structural sheet is identical with the physical dimension of the elementary cell of described second layer metal structural sheet, rotation angle between the elementary cell of the elementary cell of described first layer metal structural sheet and described second layer metal structural sheet is 90 degree.
6. the described one-way transmission of two waveband based on artificial electromagnetic material of according to claim 1 to 3 any one optical device, it is characterized in that: every layer of metal construction thicknesses of layers of described first layer metal structural sheet and described second layer metal structural sheet is 20-60nm and comprises: every layer of metal construction thicknesses of layers of described first layer metal structural sheet and described second layer metal structural sheet is 50nm.
7. the described device of transmission light based on artificial electromagnetic material of according to claim 1 to 3 any one, it is characterized in that: also comprise: the infrared transparent medium substrate, wherein, described infrared transparent medium substrate and described wall lay respectively at the both sides of described the first structured metal layer.
8. the device of the transmission light based on artificial electromagnetic material according to claim 7, it is characterized in that: the material of described infrared transparent medium substrate is quartz glass.
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Cited By (9)
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| CN105044814A (en) * | 2015-08-03 | 2015-11-11 | 欧阳征标 | Right-hand circularly-polarized conversion meta-material film |
| CN105759465A (en) * | 2016-04-01 | 2016-07-13 | 哈尔滨工程大学 | Dynamically tunable broadband polarization converter |
| CN105958209A (en) * | 2016-07-05 | 2016-09-21 | 中国矿业大学(北京) | Double-incident type electromagnetic metamaterial structure |
| CN107144909A (en) * | 2017-04-06 | 2017-09-08 | 陕西师范大学 | It is a kind of to realize single layer of gold nanostructured of asymmetric transmission and preparation method thereof |
| JP2017527857A (en) * | 2014-09-15 | 2017-09-21 | カリフォルニア インスティチュート オブ テクノロジー | Simultaneous polarization and wavefront control using planar devices |
| CN108594350A (en) * | 2018-04-28 | 2018-09-28 | 西安柯莱特信息科技有限公司 | It is a kind of can dynamic regulation asymmetric transmission signal optical polarizator and application method |
| CN113219569A (en) * | 2021-05-25 | 2021-08-06 | 韩山师范学院 | Structure for generating circular dichroism signals by noble metal structure and preparation method thereof |
| CN114740562A (en) * | 2022-05-11 | 2022-07-12 | 曲阜师范大学 | T-shaped optical diode capable of realizing dual-band polarization conversion |
| US11397331B2 (en) | 2018-10-22 | 2022-07-26 | California Institute Of Technology | Color and multi-spectral image sensor based on 3D engineered material |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017527857A (en) * | 2014-09-15 | 2017-09-21 | カリフォルニア インスティチュート オブ テクノロジー | Simultaneous polarization and wavefront control using planar devices |
| CN105044814A (en) * | 2015-08-03 | 2015-11-11 | 欧阳征标 | Right-hand circularly-polarized conversion meta-material film |
| 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 |
| CN105958209A (en) * | 2016-07-05 | 2016-09-21 | 中国矿业大学(北京) | Double-incident type electromagnetic metamaterial structure |
| CN105958209B (en) * | 2016-07-05 | 2022-09-02 | 中国矿业大学(北京) | Double-incidence left-handed material structure |
| CN107144909A (en) * | 2017-04-06 | 2017-09-08 | 陕西师范大学 | It is a kind of to realize single layer of gold nanostructured of asymmetric transmission and preparation method thereof |
| CN107144909B (en) * | 2017-04-06 | 2019-06-07 | 陕西师范大学 | A kind of single layer of gold nanostructure and preparation method thereof for realizing asymmetric transmission |
| CN108594350A (en) * | 2018-04-28 | 2018-09-28 | 西安柯莱特信息科技有限公司 | It is a kind of can dynamic regulation asymmetric transmission signal optical polarizator and application method |
| US11397331B2 (en) | 2018-10-22 | 2022-07-26 | California Institute Of Technology | Color and multi-spectral image sensor based on 3D engineered material |
| CN113219569A (en) * | 2021-05-25 | 2021-08-06 | 韩山师范学院 | Structure for generating circular dichroism signals by noble metal structure and preparation method thereof |
| CN113219569B (en) * | 2021-05-25 | 2023-01-31 | 韩山师范学院 | Structure for generating circular dichroism signals by noble metal structure and preparation method thereof |
| CN114740562A (en) * | 2022-05-11 | 2022-07-12 | 曲阜师范大学 | T-shaped optical diode capable of realizing dual-band polarization conversion |
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