CN101303423A - Magnetofluid grating - Google Patents
Magnetofluid grating Download PDFInfo
- Publication number
- CN101303423A CN101303423A CNA200810035201XA CN200810035201A CN101303423A CN 101303423 A CN101303423 A CN 101303423A CN A200810035201X A CNA200810035201X A CN A200810035201XA CN 200810035201 A CN200810035201 A CN 200810035201A CN 101303423 A CN101303423 A CN 101303423A
- Authority
- CN
- China
- Prior art keywords
- magnetofluid
- groove
- magnetic field
- grating
- magnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention relates to a magnetic fluid raster which comprises a periodic groove, a magnetic fluid filled in the periodic groove, an optical transparent rigid covering layer used for sealing the magnetic fluid in the periodic groove and a magnetic field generating device which generates an even magnetic filed in the position of the magnetic fluid and is used for changing the refractive index and the absorption coefficient of the magnetic fluid. The magnetic fluid raster utilizes an external magnetic field to control the refractive index and the absorption coefficient of the magnetic fluid so as to cause the refractive index modulation and the absorption coefficient modulation of the magnetic fluid raster to be changed with the change of the external magnetic field, thereby realizing a feature that diffraction efficiency can be adjusted by the external magnetic field. The raster with an adjustable diffraction efficiency can be used for manufacturing novel adjustable photonic devices, such as beam deflectors, light modulators and optical switches and has extremely good application prospect in the fields of photonic devices and optical communication.
Description
Technical field
The present invention relates to a kind of grating, the adjustable magnetofluid grating of particularly a kind of diffraction efficiency.
Background technology
Grating is an important device at optical field, grating device be commonly used to laser beam modulation, deflection, filtering, etc.The application of grating is very extensive, comprises integrated optics, acoustooptics, spectroscopy, optical communication, or the like.At present the grating that generally adopts of institute all has the fixing cycle, fixing refractive index and absorption coefficient modulated, so the diffraction efficiency of their each rank diffraction lights is changeless.Therefore, for a grating of having made, can only be applied to specific occasions or specific parameter environment.If can produce a kind of grating, its cycle, index modulation or absorption coefficient modulated energy are with the extraneous factor real time altering, and then the diffraction efficiency of its each rank diffraction light will also change thereupon.The tunable diffraction characteristic of this grating can be used to make tunable photon device, has good using value in the optical communication field.
At present found that the refractive index of magnetic fluid and absorption coefficient change along with the variation of the intensity of external magnetic field, reference, as, Yang etc., Applied Physics Letters, Volume 84,5204 (2004) and Horng etc., Journal of Magnetism and Magnetic Materials, Volume 252,104 (2002).This specific character of magnetic fluid is used for making grating, can realize the function that diffraction efficiency is adjustable, has good using value.But, also never have and utilize magnetic fluid to make the technology of grating and the device of magnetofluid grating through the prior art document is retrieved discovery.In view of this, develop the grating that magnetofluid grating, a kind of diffraction efficiency can online adjusting and have crucial meaning.
Summary of the invention
The present invention be directed to the traditional raster diffraction effect immobilizes, unadjustable, the problem of utilization faciostenosis, a kind of magnetofluid grating has been proposed, utilize the intensity of external magnetic field to control the refractive index and the absorption coefficient of magnetic fluid, and then make the index modulation of magnetofluid grating and the change that absorption coefficient is modulated with external magnetic field change, realize the adjustable characteristic of magnetofluid grating diffraction efficiency.
Technical scheme of the present invention is: a kind of magnetofluid grating, described magnetofluid grating comprises one-period groove, a kind of magnetic fluid, an optically transparent rigidity overlayer and a magnetic field generation device, magnetic fluid is inserted in each groove of periodicity groove, optically transparent rigidity overlayer with magnet fluid sealing in the periodicity groove, magnetic field generation device places outside the periodicity groove, magnetic field generation device energising back produces even, adjustable magnetic field in the position at magnetic fluid place, is used to change the refractive index and the absorption coefficient of magnetic fluid.
Described periodicity groove is that the optical material with the band refractive index is divided into groove one by one on optically transparent rigid substrate, and the method for making groove adopts etching method.Described magnetic fluid is coated the magnetic particle of activating agent and is used to disperse the liquid phase carrier fluid of magnetic-particle to form by the surface.The degree of depth of described periodicity groove between the 1 μ m-10 μ m, width is between 1 μ m-200 μ m.Described optically transparent rigid substrate and optically transparent rigidity overlayer are quartzy (SiO
2), optical glass.The mean refractive index n of the periods lambda of described periodicity groove, depth d, lambda1-wavelength λ and magnetofluid grating
0Satisfy relational expression 2 π λ d/ (n
0Λ)
2＜＜1 glimmer grizzly bar spare, shape is selected rectangle, serrate, cosine-shaped for use.The magnetic particle of described magnetic fluid is selected tri-iron tetroxide (Fe for use
3O
4), di-iron trioxide (Fe
2O
3), manganese-zinc ferrite, surfactant is selected oleic acid, linoleic acid, olive oil for use, the liquid phase carrier fluid is selected water, kerosene for use.Described magnetic field generation device comprises one or a pair of solenoid and an adjustable dc constant current power supply, and this adjustable dc constant current power supply is used for to electromagnet or solenoid power supply, the size control electromagnet magnetic field of its output current or the intensity of solenoid induced field.The magnetic field that described magnetic field generation device produces is parallel to substrate or tectal surface and perpendicular to the long side wall of groove.
Beneficial effect of the present invention is: the present invention is used for making grating with this liquid phase magnetisable material of magnetic fluid, utilize the refractive index of magnetic fluid and absorption coefficient characteristics with the external magnetic field Strength Changes, by external magnetic field is may command grating diffration optical efficiency, thereby has realized the grating that diffraction efficiency is adjustable.The diffraction efficiency that having realized can be online, real-time regulated is specified the order diffraction light is for the performance in optical communication and photonic device field provides new method.
Description of drawings
Fig. 1 is the periodicity groove synoptic diagram of magnetofluid grating of the present invention;
Fig. 2 is the one-piece construction synoptic diagram of magnetofluid grating of the present invention;
Fig. 3 is the index distribution and the absorption coefficient distribution schematic diagram of magnetofluid grating of the present invention;
Fig. 4 is the microphoto pictorial diagram of the periodicity groove of the embodiment of the invention;
Fig. 5 is the microphoto pictorial diagram of the magnetofluid grating of the embodiment of the invention;
Fig. 6 is the diffraction pattern of magnetofluid grating under different magnetic field intensity of the embodiment of the invention.
Embodiment
Fig. 1 is the periodicity groove synoptic diagram of magnetofluid grating, periodically groove is to be divided into groove 2 one by one with band refractive index materials 3 on optically transparent rigid substrate 1, can select the optical material of appropriate refractive index according to the needs of grating design every the material 3 of system groove, the method for making groove can adopt etching method.
Fig. 2 is the one-piece construction synoptic diagram of magnetofluid grating, and it comprises: the groove of one-period, 5, one optically transparent rigidity overlayers 4 of a kind of magnetic fluid; Magnetic field generation device of tyre, magnetic fluid 5 is inserted in each groove 2 of periodic groove, optically transparent rigidity overlayer 4 lids in the above, with magnet fluid sealing in the periodicity groove, magnetic field generation device places periodically outside the groove, and the magnetic field that the energising back produces is parallel to the surface of described substrate 1 (or overlayer 4) and perpendicular to each groove long side wall 11 of periodicity groove.
Described optically transparent rigid substrate 1 and optically transparent rigidity overlayer 4 can be selected quartz (SiO for use
2), optical glass.
The magnetic particle of described magnetic fluid 5 can be selected tri-iron tetroxide (Fe for use
3O
4), di-iron trioxide (Fe
2O
3), manganese-zinc ferrite, surfactant can be selected oleic acid, linoleic acid, olive oil for use, the optional water of liquid phase carrier fluid, kerosene.
Described magnetic field generation device comprises 6,7 and adjustable dc constant current power supplies 8 of an electromagnet (or a pair of solenoid), adjustable dc constant current power supply 8 is used for to electromagnet (or solenoid) 6,7 energising, utilizes the size of the output current of adjustable dc constant current power supply 8 to control the magnetic field intensity of electromagnet (or solenoid) 6,7.
To specifically describe the principle of work of the adjustable magnetofluid grating of diffraction efficiency of the present invention below:
Referring to Fig. 2, when adjustable dc constant current power supply 8 output currents were zero, electromagnet (or solenoid) 6,7 did not produce magnetic field, during incident beam 9 process magnetofluid gratings diffraction can take place, and the diffraction efficiency of each rank diffracted beam 10 is all determined.When adjustable dc constant current power supply 8 output currents are given electromagnet (or solenoid) 6,7, the refractive index of magnetic fluid 5 and absorption coefficient will change, thereby make the refractive index of magnetofluid grating and absorption coefficient change, shown in the index distribution and absorption coefficient distribution schematic diagram of Fig. 3 magnetofluid grating, refractive index 12 becomes among the figure 13 from figure, absorption coefficient 14 becomes among the figure 15 from figure, finally cause the diffraction efficiency of the diffracted beam 10 of magnetofluid grating to change.And the refractive index of magnetofluid grating and absorption coefficient change size and are directly proportional with the magnetic field intensity that electromagnet (or solenoid) 6,7 produces, promptly be directly proportional with adjustable dc constant current power supply 8 output current sizes, and then can change the diffraction efficiency of diffracted beam 10 continuously by continuously changing adjustable dc constant current power supply 8 output current sizes, realize the function of the continuously adjustable grating of diffraction efficiency.
To be further described with embodiment below:
At first use whirl coating platform thick photoresist of spin coating 4 μ m on a clean microslide, this microslide is as optically transparent rigid substrate 1, and this photoresist is as the material of groove periodically.Method cycle of carving on photoresist of utilizing mask lithography is that 21 μ m, dutycycle are 50% rectangle periodicity groove 2, and the back baking makes remaining photoresist hard solid then, as constituting every the material 3 of making groove.The microphoto of the periodicity groove of this embodiment made as shown in Figure 4.Magnetic fluid 5 is inserted in the above-mentioned periodicity groove 2, and covered with another clean microslide thereon, magnetic fluid 5 is sealed in wherein, this microslide is as optically transparent rigidity overlayer 4.This promptly forms magnetofluid grating, as shown in Figure 5, is the microphoto of the magnetofluid grating of this embodiment made.Adopt the adjustable diffraction efficiency of the magnetofluid grating that device observation post shown in Figure 2 produces, allow the wavelength be the produced magnetofluid grating of He-Ne laser beam 9 vertical irradiations of 632.8nm, the magnetic field that utilizes magnetic field generation device to produce varying strength, the diffraction efficiency of observing the diffracted beam 10 of the magnetofluid grating under the different magnetic field intensity.Under different magnetic field intensitys, utilize laser powermeter to measure the power of incident beam 9 and each rank diffracted beam 10, can draw the diffraction efficiency of each rank diffraction light 10 quantitatively.The diffraction pattern of magnetofluid grating among this embodiment under four kinds of different magnetic field intensity as shown in Figure 6.
Experiment shows: when magnetic field intensity increased, zeroth order diffraction diffraction of light efficient reduced, and high order diffraction diffraction of light efficient increases, and the energy of observing zeroth order diffraction light is significantly transferred to high order diffraction light and got on.Otherwise when magnetic field intensity reduced, high order diffraction diffraction of light efficient reduced, and zeroth order diffraction diffraction of light efficient increases, and the energy of observing high order diffraction light is significantly transferred to zeroth order diffraction light and got on.In this embodiment, when magnetic field intensity increased to 500Oe by 0Oe, the ratio of observing the diffraction efficiency of zeroth order diffraction light and single order diffraction light changed to 0.27 by 10.46.
The above embodiments only are used to provide and illustrate the present invention, but the scope of not limiting to this invention and being included.Other relevant variation of the present invention for a professional with usual skill, is easy and tangible.These all should be included within the present invention's scope required for protection according to the equivalent and the modification of spirit of the present invention.
Claims (10)
1. magnetofluid grating, it is characterized in that described magnetofluid grating comprises one-period groove, a kind of magnetic fluid, an optically transparent rigidity overlayer and a magnetic field generation device, magnetic fluid is inserted in each groove of periodicity groove, optically transparent rigidity overlayer with magnet fluid sealing in the periodicity groove, magnetic field generation device places outside the periodicity groove, magnetic field generation device energising back produces even, adjustable magnetic field in the position at magnetic fluid place, is used to change the refractive index and the absorption coefficient of magnetic fluid.
2. magnetofluid grating according to claim 1 is characterized in that described periodicity groove is to be divided into groove one by one with the band refractive index materials on optically transparent rigid substrate, and the method for making groove adopts etching method.
3. magnetofluid grating according to claim 1 is characterized in that described magnetic fluid, is coated the magnetic particle of activating agent and is used to disperse the liquid phase carrier fluid of magnetic-particle to form by the surface.
4. according to claim 1,2 described magnetofluid gratings, the degree of depth that it is characterized in that described periodicity groove between 1 μ m, the 10 μ m, width is between 1 μ m-200 μ m.
5. according to claim 1,2 described magnetofluid gratings, it is characterized in that described optically transparent rigid substrate and optically transparent rigidity overlayer are quartzy (SiO
2), optical glass.
6. according to claim 1,2,3,4 described magnetofluid gratings, it is characterized in that the mean refractive index n of the periods lambda of described periodicity groove, depth d, lambda1-wavelength λ and magnetofluid grating
0Satisfy relational expression 2 π λ d/ (n
0Λ)
2＜＜1 glimmer grizzly bar spare.
7. according to claim 1,2,4,6 described magnetofluid gratings, it is characterized in that the shape of described periodicity groove is selected rectangle, serrate, cosine-shaped for use.
8. according to claim 1,3 described magnetofluid gratings, it is characterized in that the magnetic particle of described magnetic fluid is selected tri-iron tetroxide (Fe for use
3O
4), di-iron trioxide (Fe
2O
3), manganese-zinc ferrite, surfactant is selected oleic acid, linoleic acid, olive oil for use, the liquid phase carrier fluid is selected water, kerosene for use.
9. magnetofluid grating according to claim 1, it is characterized in that described magnetic field generation device comprises electromagnet or a pair of solenoid and an adjustable dc constant current power supply, this adjustable dc constant current power supply is used for to electromagnet or solenoid power supply, the size control electromagnet magnetic field of its output current or the intensity of solenoid induced field.
10. according to claim 1,9 described magnetofluid gratings, it is characterized in that the magnetic field that described magnetic field generation device produces is parallel to substrate or tectal surface and perpendicular to the long side wall of groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810035201XA CN101303423A (en) | 2008-03-27 | 2008-03-27 | Magnetofluid grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810035201XA CN101303423A (en) | 2008-03-27 | 2008-03-27 | Magnetofluid grating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101303423A true CN101303423A (en) | 2008-11-12 |
Family
ID=40113417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200810035201XA Pending CN101303423A (en) | 2008-03-27 | 2008-03-27 | Magnetofluid grating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101303423A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388639A (en) * | 2015-10-30 | 2016-03-09 | 南京邮电大学 | Photoswitch of corrosion type fiber grating under anisotropism liquid phase magnetic fluid |
| CN106290254A (en) * | 2016-07-22 | 2017-01-04 | 京东方科技集团股份有限公司 | A kind of refractometry device, refractive index measurement method and device |
| CN107153230A (en) * | 2017-06-27 | 2017-09-12 | 常州瑞丰特科技有限公司 | Manufacture method based on controllable magnetic field balzed grating, |
| CN107274767A (en) * | 2017-07-25 | 2017-10-20 | 重庆科技学院 | A kind of adjustable steady magnetic field experimental provision |
| CN107393381A (en) * | 2017-07-25 | 2017-11-24 | 重庆科技学院 | A kind of application method of adjustable steady magnetic field experimental provision |
| CN108733965A (en) * | 2018-08-30 | 2018-11-02 | 沈阳建筑大学 | The magnetofluid grating and analogy method gone out based on aspherical molecular dynamics simulation |
| CN109083563A (en) * | 2018-07-02 | 2018-12-25 | 北京小米智能科技有限公司 | Window, window control method and device, electronic equipment, storage medium |
| CN112130249A (en) * | 2020-08-17 | 2020-12-25 | 桂林电子科技大学 | Programmable fiber grating based on magnetofluid |
-
2008
- 2008-03-27 CN CNA200810035201XA patent/CN101303423A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388639A (en) * | 2015-10-30 | 2016-03-09 | 南京邮电大学 | Photoswitch of corrosion type fiber grating under anisotropism liquid phase magnetic fluid |
| CN106290254A (en) * | 2016-07-22 | 2017-01-04 | 京东方科技集团股份有限公司 | A kind of refractometry device, refractive index measurement method and device |
| CN106290254B (en) * | 2016-07-22 | 2018-10-30 | 京东方科技集团股份有限公司 | A kind of refractometry device, refractive index measurement method and device |
| CN107153230A (en) * | 2017-06-27 | 2017-09-12 | 常州瑞丰特科技有限公司 | Manufacture method based on controllable magnetic field balzed grating, |
| CN107153230B (en) * | 2017-06-27 | 2019-09-06 | 常州瑞丰特科技有限公司 | Manufacturing method based on controllable magnetic field balzed grating, |
| CN107274767A (en) * | 2017-07-25 | 2017-10-20 | 重庆科技学院 | A kind of adjustable steady magnetic field experimental provision |
| CN107393381A (en) * | 2017-07-25 | 2017-11-24 | 重庆科技学院 | A kind of application method of adjustable steady magnetic field experimental provision |
| CN107393381B (en) * | 2017-07-25 | 2019-11-26 | 重庆科技学院 | A kind of application method of adjustable steady magnetic field experimental provision |
| CN109083563A (en) * | 2018-07-02 | 2018-12-25 | 北京小米智能科技有限公司 | Window, window control method and device, electronic equipment, storage medium |
| CN108733965A (en) * | 2018-08-30 | 2018-11-02 | 沈阳建筑大学 | The magnetofluid grating and analogy method gone out based on aspherical molecular dynamics simulation |
| CN112130249A (en) * | 2020-08-17 | 2020-12-25 | 桂林电子科技大学 | Programmable fiber grating based on magnetofluid |
| CN112130249B (en) * | 2020-08-17 | 2022-04-19 | 桂林电子科技大学 | Programmable fiber grating based on magnetofluid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101303423A (en) | Magnetofluid grating | |
| Sun et al. | All-dielectric full-color printing with TiO2 metasurfaces | |
| Seo et al. | Multicolored vertical silicon nanowires | |
| Wang et al. | Superlattice plasmons in hierarchical Au nanoparticle arrays | |
| Baranov et al. | Tuning of near‐and far‐field properties of all‐dielectric dimer nanoantennas via ultrafast electron‐hole plasma photoexcitation | |
| Hu et al. | Bio-inspired hierarchical patterning of silicon by laser interference lithography | |
| De Tommasi et al. | Frontiers of light manipulation in natural, metallic, and dielectric nanostructures | |
| Fukushima et al. | Fabrication of gold nanoparticles and their influence on optical properties of dye-doped sol-gel films | |
| Achanta | Plasmonic quasicrystals | |
| Grineviciute et al. | Angular filtering by Bragg photonic microstructures fabricated by physical vapour deposition | |
| CN100570756C (en) | A kind of metal film and manufacture method thereof | |
| Ray et al. | Large aperture and durable glass-engraved optical metasurfaces using nanoparticle etching masks: prospects and future directions | |
| Mildner et al. | Plasmonic trapping potentials for cold atoms | |
| CN109116687A (en) | A kind of photogenerated device of super resolution lithography | |
| CN204422812U (en) | A kind of microstructure realizing broadband enhancing diffraction | |
| Liu et al. | Applications of nanostructures in wide-field, label-free super resolution microscopy | |
| CN100403076C (en) | Optical beam splitting device based on metal micro-nano structure and producing method thereof | |
| CN104597566B (en) | It is a kind of to realize that broadband strengthens the micro-structural of diffraction | |
| Pudis et al. | Optical properties of woodpile structures for application on the surface of photonic devices | |
| Lee et al. | Modeling of three-dimensional photoresist profiles exposed by localized fields of high-transmission nano-apertures | |
| Elfström et al. | Fabrication of blazed gratings by area-coded effective medium structures | |
| Park | Study on nonlinear multi-dimensional direct laser writing by using ultrashort high power laser | |
| CN101571608B (en) | Quartz transmission polarization irrelevant beam-splitting grating for 1310 nanometer waveband | |
| CN201242598Y (en) | 1*3 polarization irrelevant beam-splitting grating for 785 nanometer waveband fused silica transmission | |
| Bae et al. | Inverse Design of Electromagnetic Phase Singularities |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081112 |