CN101923185A - Terahertz wave quasi-optics polaroid sheet and preparation method thereof - Google Patents
Terahertz wave quasi-optics polaroid sheet and preparation method thereof Download PDFInfo
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- CN101923185A CN101923185A CN 201010255801 CN201010255801A CN101923185A CN 101923185 A CN101923185 A CN 101923185A CN 201010255801 CN201010255801 CN 201010255801 CN 201010255801 A CN201010255801 A CN 201010255801A CN 101923185 A CN101923185 A CN 101923185A
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Abstract
The invention discloses a terahertz wave quasi-optics polaroid sheet and a preparation method thereof. The terahertz wave quasi-optics polaroid sheet comprises a metal wire grating structure and a polymer substrate. The manufacturing method of the terahertz wave quasi-optics polaroid sheet comprises the step of printing metal on the clean and dry polymer substrate to manufacture the polaroid sheet with the wire grating structure through an aerosol spray printing or micro-contact printing method, wherein the metal comprises one of aluminum, gold, silver and copper, and materials of the polymer substrate are selected from a terahertz wave band high-permeability thin polymer film. The invention can realize the manufacturing method of the terahertz wave quasi-optics polaroid sheet which has low cost, high accuracy and more specialized application by utilizing an electronic printing technology.
Description
Technical field
The present invention relates to a kind of polaroid and manufacture method thereof that is applicable to the broadband terahertz wave band, this polaroid utilizes the terahertz wave quasi-optics manufacturing, can realize on a large scale, produce cheaply.
Background technology
Terahertz (THz) ripple is meant the electromagnetic wave of frequency in 0.1-10THz (wavelength 30 μ m-3000 μ m) scope.In that it thereby occupies very special position on the spectrogram in electromagnetic spectrum between microwave and infrared light.For many years, owing to lack practicable THz ripple production method and detection means, people know little about it to the characteristic of THz wave band, so that the application development of THz wave science and technology is very restricted, becoming has last of pending comprehensive research frequency window in the electromagnetic wave spectrum, be called as " THz space " in the electromagnetic wave spectrum.In actual applications, except THz source and these two important steps of detector received much concern, the function element of THz also had been subjected to great attention.As the terahertz polarization device, this quasi-optics polarizer not only can be used on the radar, can also be used in communication aspects, all will be widely used at aspects such as beam splitter, optoisolator, light adjuster and light switches.
Existing in the market a kind of terahertz polarization sheet is no support metal wiregrating, is made of the tungsten silk screen that is fixed on the annular frame.Though it is good not have support metal wire-grid polarizer polarization property, because the tungsten filament size is too little, make the comparison difficulty, and tungsten silk screen damages easily, make that its production cost is higher.Another is the polarizer of substrate with the polythene material, though its processing cost is lower than no support metal wire-grid polarizer, but, coat the aluminium film in the one side of groove then because it adopts the method for portrayal grating to depict a series of jagged groove faces earlier in substrate.The shortcoming of this polarizer is the Rowland ghost that is easy to generate of the cyclical variation error of grating portrayal spacing and the scrambling and the damage of delineation, the scattered light that is easy to generate.
Summary of the invention
At above problem, purpose of the present invention is intended to propose a kind of terahertz wave quasi-optics polaroid sheet and preparation method thereof, employing has Support Level palisade metal construction in the high saturating polymer thin films of terahertz wave band as substrate, compare with the tygon polarizer with no support metal wire-grid polarizer, it is easier, convenient to make, also more even, and can produce on a large scale.
One object of the present invention will be achieved through the following technical solutions:
A kind of terahertz wave quasi-optics polaroid sheet for generate the metallic film that wire grid construction is arranged on base material, is characterized in that: described base material is that film thickness is less than 400 μ m in the high saturating polymer thin films of terahertz wave band.Described polymer thin films is the film that forms based on high molecular polymer, and wherein said high molecular polymer comprises after the film forming at least at terahertz wave band high saturating polypropylene and polymethylpentene.
Further, aforesaid a kind of terahertz wave quasi-optics polaroid sheet, wherein this metallic film comprises one of them the formed film of metal material of aluminium, gold, silver, copper, the thickness of metallic film is less than 15 μ m, and the metal line-width of the metallic film of wire grid construction is less than 15 μ m, the grid spacing between 30 μ m between the 3000 μ m.
The technical scheme that realizes above-mentioned second purpose of the present invention is:
A kind of preparation method of terahertz wave quasi-optics polaroid sheet is characterized in that comprising the thin polymer film substrate of step: I, preparation cleaning, drying; II, adopt micro-contact printing or gasoloid spray printing the electronic printing method in conjunction with immersion method, preparation forms the metallic film of width, wire grid construction that the grid spacing is certain in the thin polymer film substrate.
Further, the preparation method of aforementioned a kind of terahertz wave quasi-optics polaroid sheet, adopt the electronic printing method of micro-contact printing, the processing step that wherein also comprises preparation PDMS die before the Step II, this PDMS stamp surfaces have complementary mutually with wire grid construction and pouring is soaked with the modular figure of ODT unimolecular layer.
Further, the preparation method of aforementioned a kind of terahertz wave quasi-optics polaroid sheet, in the Step II, the PDMS die by little contact printing with the modular figure transfer of ODT unimolecular layer to the thin polymer film substrate, and be the fatty mercaptan unimolecular layer of carboxyl with ethanolic solution self assembly in the thin polymer film substrate formation end of MUA, water-bath certain hour in metal ammonium ion solution takes out, cleans and the dry polymer film then.
Implement technical scheme of the present invention, its beneficial effect is:
The present invention proposes and a kind ofly in the high saturating thin polymer film substrate of terahertz wave band, also can realize polarization property, a kind of quasi-optics terahertz polarization device and low cost thereof, extensive, high-precision preparation method are provided with terahertz wave quasi-optics processing metal line.Utilize terahertz wave quasi-optics, can make thinner, light, and polaroid flexibly,, can realize more professional application because its optical signature can be customized.Compare with the tygon polarizer with no support metal wire-grid polarizer, it is easier, convenient, also more even to make, and also can produce on a large scale.
Description of drawings
Below in conjunction with specific embodiment and accompanying drawing thereof the present invention being innovated essence is described in further detail:
Fig. 1 is the structural representation of terahertz wave quasi-optics polaroid sheet.
Embodiment
The practicality of understanding its substantive distinguishing features and being had for a kind of terahertz wave quasi-optics polaroid sheet of the present invention and preparation method thereof is easier to, below constipation close accompanying drawing the present invention is described in further detail.But following description and explanation about embodiment do not constitute any limitation protection domain of the present invention.
As shown in Figure 1, the present invention has disclosed a kind of electromagnetic wave to terahertz wave band and has had the polaroid that covers and see through function, and this polaroid can be applied in aspects such as terahertz polarization device, beam splitter, optoisolator, light adjuster and light switch.Its architectural feature is visible as uniform single-layer metal wire grid construction from diagram and is superimposed upon in the substrate.Wherein, metal material is a kind of material in aluminium, gold, silver, the copper, and metal material thickness is less than 15 microns.Base material is in the high saturating polymer thin films of terahertz wave band, comprises high molecular polymer a kind of materials wherein such as polypropylene, polymethylpentene, and film thickness is less than 400 microns.The metal line-width of wiregrating shape structure is less than 15 microns, and the grid spacing is between 30 microns to 3000 microns.
Below by concrete case study on implementation, the preparation method of polaroid of the present invention is launched to describe:
Embodiment one: micro-contact-printing
At first preparation bidirectional stretching polypropylene film (BOPP) dry, cleaning is stand-by.PDMS prepolymer and hardening agent are mixed by 10: 1 mass ratio and stir evenly, potpourri is cast on the silicon masterplate, leaves standstill after 2h treats that minute bubbles are removed fully, places baking oven to solidify 1.5h in 65 ℃.After the PDMS that curing is finished is cooled to room temperature, it is peeled off from the silicon template, obtain elastomeric stamp.
Figure complementation on lip-deep microstructure of seal and the silicon template, size is equal to.With 1mL concentration is 10mmolL
-1The ODT ethanolic solution drench and to soak the PDMS die. then, on quick peeler with 3000rmin
-1Speed rotation 1min, die is gently placed on the clean polypropylene film, peel off gently after pressing the several seconds with have gentle hands.At ambient temperature, to immerse concentration be 2.5mmolL to the polypropylene film that will have a Templated ODT unimolecular layer
-1The MUA ethanolic solution in about 1h. so that in the self assembly of polypropylene film remainder end be the fatty mercaptan unimolecular layer of carboxyl.The sodium hydrate aqueous solution of 30 μ L concentration 20% being joined in the silver nitrate aqueous solution of 1mL concentration 5%, form brown silver oxide precipitation. the ammoniacal liquor that drips concentration 6% in this mixed liquor dissolves fully until precipitation and forms [Ag (NH
3)
2]
+, silver nitrate aqueous solution to the solution that adds concentration 5% then becomes light brown or yellow, adds the ammoniacal liquor of a concentration 6% again, and solution becomes is transparent.0.2mL methyl alcohol and 0.8mL water are joined above-mentioned [Ag (NH
3)
2]
+In the solution, the polypropylene screen that will have the template self assembled monolayer is placed in one, and sealed reactor reacts 30min～40min in 60～80 ℃ of water-baths, takes out polypropylene film, and water thoroughly cleans, and air drying gets final product.
Embodiment two: gasoloid spray printing method
The preparation method of terahertz wave quasi-optics polaroid sheet of the present invention can also launch to describe in order to following method: the printing type of using the gasoloid spray printing on the polymethylpentene substrate, metals such as gold, silver, copper are dissolved in the volatile organic solvent, in ethanolic solution, make metallic ink.By regulating the parameter setting of gasoloid ink-jet printer, between 30 microns to 3000 microns, control ink droplet diameter is not more than 15 microns metallic ink and evenly is printed on the poly-methyl pentene film with the size adjustment between the metal wire.At a certain temperature, along with the volatilization of solvent, metal wire can combine with poly-methyl pentene film, thereby obtains a kind of quasi-optics polaroid sheet at terahertz wave band.
Below only be the representational embodiment that has much in the numerous concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, all drop within the rights protection scope of the present invention.
Claims (7)
1. terahertz wave quasi-optics polaroid sheet for generate the metallic film that wire grid construction is arranged on base material, is characterized in that: described base material is in the high saturating polymer thin films of terahertz wave band, and film thickness is less than 400 μ m.
2. a kind of terahertz wave quasi-optics polaroid sheet according to claim 1, it is characterized in that: the film of described polymer thin films for forming based on high molecular polymer, wherein said high molecular polymer comprise after the film forming at least at terahertz wave band high saturating polypropylene and polymethylpentene.
3. a kind of terahertz wave quasi-optics polaroid sheet according to claim 1 is characterized in that: described metallic film comprises one of them the formed film of metal material of aluminium, gold, silver, copper, and the thickness of described metallic film is less than 15 μ m.
4. a kind of terahertz wave quasi-optics polaroid sheet according to claim 1 is characterized in that: the metal line-width of the metallic film of described wire grid construction is less than 15 μ m, the grid spacing between 30 μ m between the 3000 μ m.
5. the preparation method of the described a kind of terahertz wave quasi-optics polaroid sheet of claim 1 is characterized in that comprising the thin polymer film substrate of step: I, preparation cleaning, drying;
II, adopt micro-contact printing or gasoloid spray printing the electronic printing method in conjunction with immersion method, preparation forms the metallic film of width, wire grid construction that the grid spacing is certain in the thin polymer film substrate.
6. the preparation method of a kind of terahertz wave quasi-optics polaroid sheet according to claim 5, it is characterized in that: the electronic printing method that adopts micro-contact printing, the processing step that wherein also comprises preparation PDMS die before the Step II, described PDMS stamp surfaces have complementary mutually with wire grid construction and pouring is soaked with the modular figure of ODT unimolecular layer.
7. the preparation method of a kind of terahertz wave quasi-optics polaroid sheet according to claim 6, it is characterized in that: in the Step II, the PDMS die by little contact printing with the modular figure transfer of ODT unimolecular layer to the thin polymer film substrate, and be the fatty mercaptan unimolecular layer of carboxyl with ethanolic solution self assembly in the thin polymer film substrate formation end of MUA, water-bath certain hour in metal ammonium ion solution takes out, cleans and the dry polymer film then.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879914A (en) * | 2012-10-09 | 2013-01-16 | 中国计量学院 | Combed terahertz polarization beam splitter |
| CN104048768A (en) * | 2014-06-23 | 2014-09-17 | 山东科技大学 | Fabry-Perot THz wavelength measurement instrument based on metal wire grids and measurement method |
| CN104536075A (en) * | 2015-01-19 | 2015-04-22 | 中国科学院重庆绿色智能技术研究院 | Terahertz polaroid |
| CN105158836A (en) * | 2015-10-08 | 2015-12-16 | 中国科学院重庆绿色智能技术研究院 | Terahertz polarizing plate based on dual-layer metal wire gating structure |
| CN107065058A (en) * | 2017-04-21 | 2017-08-18 | 南京大学 | Thin-film material as Terahertz and infrared light polarization modulation and preparation method thereof |
| CN108489930A (en) * | 2018-01-30 | 2018-09-04 | 中国科学院上海技术物理研究所 | Passive type THz spectrometers based on unit born of the same parents' solid phase grating |
| CN112276487A (en) * | 2020-10-18 | 2021-01-29 | 西安电子工程研究所 | Processing method of terahertz waveguide piston adjusting block |
| CN113922074A (en) * | 2021-10-08 | 2022-01-11 | 中国计量大学 | Terahertz controller with variable functions |
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| US20050046943A1 (en) * | 2003-08-25 | 2005-03-03 | Takayoshi Suganuma | Wire grid polarizer and method for producing same |
| CN101290371A (en) * | 2008-05-30 | 2008-10-22 | 苏州大学 | Sub-wavelength grate structure polarizing film and its manufacture method |
| US20100007827A1 (en) * | 2006-12-05 | 2010-01-14 | Nippon Oil Corporation | Wire-grid polarizer, method for producing the wire-grid polarizer, retardation film and liquid crystal display device using the retardation film |
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| US20100007827A1 (en) * | 2006-12-05 | 2010-01-14 | Nippon Oil Corporation | Wire-grid polarizer, method for producing the wire-grid polarizer, retardation film and liquid crystal display device using the retardation film |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879914A (en) * | 2012-10-09 | 2013-01-16 | 中国计量学院 | Combed terahertz polarization beam splitter |
| CN102879914B (en) * | 2012-10-09 | 2014-08-06 | 中国计量学院 | Combed terahertz polarization beam splitter |
| CN104048768A (en) * | 2014-06-23 | 2014-09-17 | 山东科技大学 | Fabry-Perot THz wavelength measurement instrument based on metal wire grids and measurement method |
| CN104048768B (en) * | 2014-06-23 | 2017-03-08 | 山东科技大学 | Fabry Perot THz wavelength measurement instrument based on wire grating and measuring method |
| CN104536075A (en) * | 2015-01-19 | 2015-04-22 | 中国科学院重庆绿色智能技术研究院 | Terahertz polaroid |
| CN105158836A (en) * | 2015-10-08 | 2015-12-16 | 中国科学院重庆绿色智能技术研究院 | Terahertz polarizing plate based on dual-layer metal wire gating structure |
| CN107065058A (en) * | 2017-04-21 | 2017-08-18 | 南京大学 | Thin-film material as Terahertz and infrared light polarization modulation and preparation method thereof |
| CN107065058B (en) * | 2017-04-21 | 2019-03-22 | 南京大学 | Thin-film material and preparation method thereof as Terahertz and infrared light polarization modulation |
| CN108489930A (en) * | 2018-01-30 | 2018-09-04 | 中国科学院上海技术物理研究所 | Passive type THz spectrometers based on unit born of the same parents' solid phase grating |
| CN112276487A (en) * | 2020-10-18 | 2021-01-29 | 西安电子工程研究所 | Processing method of terahertz waveguide piston adjusting block |
| CN113922074A (en) * | 2021-10-08 | 2022-01-11 | 中国计量大学 | Terahertz controller with variable functions |
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Application publication date: 20101222 |