CN102768386A - Micro-nano fiber downloading filter based on rainbow local effect - Google Patents
Micro-nano fiber downloading filter based on rainbow local effect Download PDFInfo
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- CN102768386A CN102768386A CN2012102359221A CN201210235922A CN102768386A CN 102768386 A CN102768386 A CN 102768386A CN 2012102359221 A CN2012102359221 A CN 2012102359221A CN 201210235922 A CN201210235922 A CN 201210235922A CN 102768386 A CN102768386 A CN 102768386A
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Abstract
The invention provides a micro-nano fiber downloading filter based on the rainbow local effect. The filter comprises a micro-nano fiber (1), wherein a metal grating structure (2) is formed on the surface of the micro-nano fiber (1) by using an optical micromachining technology, and plasmon harmonic oscillations with different wavelengths are localized by the metal grating structure to different spatial positions, and are coupled in different spatial positions by a second micro nano-fiber (4) as download channels to realize downloading of lights with different wavelengths. The device downloads lights with different frequencies based on the rainbow local effect, that is, the device localizes plasmon harmonic oscillations with different wavelengths to different spatial positions by using gradient or chirped grating, so that the download channels are located in different spatial positions to realize downloading of lights with different wavelengths, and in turn realize on-line downloading of optical signals from visible light to the infrared band.
Description
Technical field
What the present invention relates to is the integrated device in a kind of optical fiber communication, and particularly a kind of micro-nano fiber based on the rainbow local effect is downloaded wave filter.
Background technology
Surface plasma excimer (Surface Plasmon Polaritons; SPPs) be the free electron of light and the metal surface caused a kind of surface electromagnetic wave pattern that interacts; In this interaction, collective oscillation takes place in free electron under the light-wave irradiation identical with its resonant frequency.It is confined near metal and the medium interface, propagates along the surface, and can under the particular nanostructure condition, form the local fields enhancing.It can overcome diffraction limit, produces the optical phenomena of many novelties, like negative refraction, ultrahigh resolution imaging, transmission enhancing etc.These novel phenomenons are indicating new principle, new theory, new technology.When changing the metal surface structure, the character of surface plasma excimer, dispersion relation, excitation mode, coupling effect etc. all will produce great variation.Through interacting between SPPs and the light field, can realize the active that light is propagated is controlled.Surface plasma excimer has remarkable advantages aspect the photonic device of development of miniaturized, and SPPs provides possibility for the novel photonic device of development, wideband communication system, surface plasma photon chip, small photon loop, modulator and switch, data storage, microscope, new type light source, solar cell, novel photon sensor etc.At present, the sub-wavelength optics based on SPPs becomes one of research direction with the fastest developing speed in optics and the photonics.The optical device of metal surface plasma body has received increasing concern.
Compare with the micro-nano optical waveguide of other types; Micro-nano fiber has that the preparation of being easy to, simple in structure, diameter good uniformity, loss are low, good mechanical property, should not break, be convenient to and advantages such as existing fibre system is integrated, and is favourable with the integrated ten minutes of development high-density optical to development small size micro-nano photonic device.Existing at present like coupling mechanism, laser instrument, wave filter, interferometer, sensor, fiber grating etc.The micro-nano fiber of difformity xsect produced (circle: Nature, 2003,426,816-819, type rectangle: Opt.Lett.2010,35,378-380).The reduction of waveguide dimensions can be so that the overall dimensions of device reduces, thereby improves integrated level, reduces cost, and micro-nano fiber can brought into play basic effect in the micro-nano optoelectronic device of the sub-wavelength structure in future.
Optical fiber surface plasmon sensor (seeing United States Patent(USP) No. 5,647,030 and No.5,327,225) also has a lot of reports.Utilize the rainbow capture effect of the surface plasma generation of metal grating structure to obtain experimental verification at visible light wave range in the conventional waveguide substrate, this effect will be significant in optical storage field of future generation.Promptly utilize metal grating with the phasmon resonance local of different wave length in different spatial positions, the light of different-waveband will be parked in different spatial positions, can realize the memory function of light signal in different spatial.But present structure is difficult to carry out interconnectedly with existing optical communication system, the rainbow local effect is applied in the micro-nano fiber does not also appear in the newspapers.
Summary of the invention
The object of the present invention is to provide a kind of visible light of can realizing to download wave filter to the micro-nano fiber based on the rainbow local effect of the online download of light signal of infrared band.
The objective of the invention is to realize like this:
Comprise micro-nano fiber 1; Utilize the optics micro-processing technology to form metal grating structure 2 on micro-nano fiber 1 surface; Metal grating structure in different spatial positions, is realized the download of different wavelengths of light with the phasmon resonance local of different wave length as download channel by 4 couplings of second micro-nano fiber in different spatial.
The present invention can also comprise:
1, said metal grating structure is the graded metal optical grating construction.
2, said metal grating structure is the metal grating structure of warbling.
3, said graded metal optical grating construction is meant that the grid width t of grating periods lambda and raster unit 5 is definite values, and the high h of the grid of raster unit 5 is a graded, and wideband light source 3 injects from the less side of graded metal grating height h.
4, the said metal grating structure of the warbling high h of grid and the grid width t that are meant raster unit 5 is definite value, and the grating periods lambda is the variation of warbling, and wideband light source 3 injects from the less side of the metal grating periods lambda of warbling.
5, said metal grating structure 2 is directly to make the gradient or the metal grating structure of warbling of projection on micro-nano fiber 1 surface; Or utilize photoetching technique to carve the microflute of gradient or chirp grating structure earlier on micro-nano fiber 1 surface, deposit metal in formation flush type metal grating structure in the microflute then.
6, the xsect of said micro-nano fiber 1 is circle, D type or type rectangle.
7, the diameter of said micro-nano fiber 1 is the 500-4000 nanometer; Metal grating periods lambda scope is the 100-300 nanometer, the high 5-1000 nanometer of the grid of raster unit 5, the grid width 30-100 nanometer of raster unit 5.
8, said metal is gold, silver or aluminium.
The invention provides a kind of microminiature and download wave filter based on the micro-nano fiber of rainbow local effect.This device download different frequency only based on the rainbow local effect; Promptly utilize gradient or chirp grating with the phasmon resonance local of different wave length in different spatial positions; Download channel is positioned at the download that different spatial realizes different wavelengths of light, and then can realize that visible light is to the online download of the light signal of infrared band.
Compared with prior art, advantage of the present invention is:
1, this to download wave filter volume little, simple in structure, be easy to realize that full optical fiber is integrated, with the existing fiber technology carry out interconnected, significant in the micro-nano optoelectronic device for the sub-wavelength structure in future;
2, this storer can realize that visible light is to the online download of the broadband optical signal of infrared band.
Description of drawings
Fig. 1 (a) is that the circular micro-nano fiber of projection graded metal grating rainbow local effect is downloaded filter graph architecture;
Fig. 1 (b) is that the circular micro-nano fiber of projection graded metal grating rainbow local effect is downloaded wave filter side throwing figure;
Fig. 1 (c) is an annulus metal grating cell schematics;
Fig. 2 (a)-Fig. 2 (c) is to be respectively circle, D shape optical fiber and type rectangle micro-nano fiber xsect;
Fig. 3 is that the circular micro-nano fiber of semicircular ring projection graded metal grating is downloaded filter graph architecture;
Fig. 4 is that the circular micro-nano fiber of metal grating flush type is downloaded filter graph architecture;
Fig. 5 is that the taper micro-nano fiber of projection graded metal grating rainbow local effect is downloaded filter graph architecture;
Fig. 6 (a) is that the warble D shape micro-nano fiber of metal grating rainbow local effect of projection is downloaded filter graph architecture;
Fig. 6 (b) is a rectangular metal raster unit synoptic diagram.
Embodiment
For example the present invention is done description in more detail below in conjunction with accompanying drawing:
Embodiment 1:
Micro-nano fiber based on the rainbow local effect is downloaded wave filter; Mainly forming annular protrusions gradient silver metal optical grating construction 2 on the surface by circular micro-nano fiber 1-1 surface by utilizing optics micro-processing technology constitutes; Download channel is accomplished by micro-nano fiber 4 couplings, and wideband light source 3 injects from the less side of graded metal grating height h.Graded metal optical grating construction 2 is meant that the grid width t of metal grating periods lambda and metal grating unit 5 is definite values, and the high h of the grid of metal grating unit 5 is that linear gradient changes.The micro-nano fiber diameter is 2000 nanometers; The metal grating cycle is 200 nanometers, the high 5-1000 nanometer of metal gate, metal grid width 80 nanometers.The light of different wave length will be parked in different positions along fiber length, and micro-nano fiber 4 is with the optically-coupled that stops, and then the completion download function.
Embodiment 2:
Micro-nano fiber based on the rainbow local effect is downloaded wave filter; Mainly forming annulus flush type gradient silver metal optical grating construction 2 on the surface by circular micro-nano fiber 1-1 surface by utilizing optics micro-processing technology constitutes; Download channel is accomplished by micro-nano fiber 4 couplings, and wideband light source 3 injects from the less side of graded metal grating height h.The micro-nano fiber diameter is 2000 nanometers; The metal grating cycle is 180 nanometers, metal grid width 70 nanometers, the linear graded of the high 5-900 nanometer of metal gate.Utilize FDTD emulation, the apparent different spatial positions that is parked in of the light of 200THz, 180THz, 3 different frequencies of 150THz realizes light local function, and the short light of wavelength is parked in the less side of grating height h, and wavelength is got over position, lasting arrangement territory the closer to the right side.
Embodiment 3:
Micro-nano fiber based on the rainbow local effect is downloaded wave filter; Mainly forming rectangle flush type gradient silver metal optical grating construction 2 by D shape micro-nano fiber 1-1 surface by utilizing optics micro-processing technology at flat surfaces constitutes; Download channel is accomplished by micro-nano fiber 4 couplings, and wideband light source 3 injects from the less side of graded metal grating height h.The micro-nano fiber diameter is 4000 nanometers; The metal grating cycle is 180 nanometers, metal grid width 70 nanometers, the high 5-900 nanometer of metal gate linear graded, totally 60 cycles.Utilize FDTD emulation, efficiency ratio embodiment 2 can decrease.The apparent different spatial positions that is parked in of the light of 300THz, 200THz, 3 different frequencies of 150THz realizes light local function, and the short light of wavelength is parked in the less side of grating height h, and wavelength is got over position, lasting arrangement territory the closer to the right side.
Embodiment 4:
Micro-nano fiber based on the rainbow local effect is downloaded wave filter; Be that circular taper micro-nano fiber 1-1 surface by utilizing optics micro-processing technology forms annular protrusions gradient silver metal optical grating construction 2 and constitutes on the surface mainly by xsect; Download channel is accomplished by micro-nano fiber 4 couplings, and wideband light source 3 injects from the less side of graded metal grating height h.Graded metal optical grating construction 2 is meant that the grid width t of metal grating periods lambda and metal grating unit 5 is definite values, and the high h of the grid of metal grating unit 5 is that linear gradient changes.The micro-nano fiber diameter is 2000 nanometers; The metal grating cycle is 200 nanometers, the high 5-900 nanometer of metal gate, metal grid width 60 nanometers.The light of different wave length will be parked in different positions along fiber length, and micro-nano fiber 4 is with the optically-coupled that stops, and then the completion download function.
Embodiment 5:
Micro-nano fiber based on the rainbow local effect is downloaded wave filter; Mainly forming the rectangular protrusions formula silver metal optical grating construction 2 of warbling by D shape micro-nano fiber 1-1 surface by utilizing optics micro-processing technology at flat surfaces constitutes; Download channel is accomplished by micro-nano fiber 4 couplings, and wideband light source 3 injects from a less side of the metal grating cycle of warbling.The metal grating structure 2 of warbling is meant that the high h of grid and the grid width t of metal grating unit 5 are definite values, and the metal grating periods lambda is that linear chrip changes.The micro-nano fiber diameter is 2000 nanometers; The metal grating cycle is 100 nanometers, metal grid width 70 nanometers, the linear graded of the high 5-900 nanometer of metal gate.The light of different frequency is parked in different spatial positions, and then realizes light local function, and the short light of wavelength is parked in a less side of grating cycle, and wavelength is got over position, lasting arrangement territory the closer to the right side.
Claims (10)
1. the micro-nano fiber based on the rainbow local effect is downloaded wave filter; Comprise micro-nano fiber (1); It is characterized in that: utilize the optics micro-processing technology to form metal grating structure (2) on micro-nano fiber (1) surface; Metal grating structure in different spatial positions, is realized the download of different wavelengths of light with the phasmon resonance local of different wave length as download channel by second micro-nano fiber (4) coupling in different spatial.
2. the micro-nano fiber based on the rainbow local effect according to claim 1 is downloaded wave filter, and it is characterized in that: said metal grating structure is the graded metal optical grating construction or the metal grating structure of warbling.
3. the micro-nano fiber based on the rainbow local effect according to claim 2 is downloaded wave filter; It is characterized in that: said graded metal optical grating construction is meant that the grid width t of grating periods lambda and raster unit (5) is a definite value; The high h of grid of raster unit (5) is a graded, and wideband light source (3) injects from the less side of graded metal grating height h.
4. the micro-nano fiber based on the rainbow local effect according to claim 1 is downloaded wave filter; It is characterized in that: the said metal grating structure of warbling is meant that the high h of grid and the grid width t of raster unit (5) are definite values; The grating periods lambda is the variation of warbling, and wideband light source (3) injects from the less side of the metal grating periods lambda of warbling.
5. download wave filter according to any one described micro-nano fiber based on the rainbow local effect of claim 1-4, it is characterized in that: said metal grating structure (2) is the gradient or the metal grating structure of warbling of directly making projection on micro-nano fiber (1) surface; Or utilize photoetching technique to carve the microflute of gradient or chirp grating structure earlier on micro-nano fiber (1) surface, deposit metal in formation flush type metal grating structure in the microflute then.
6. the micro-nano fiber based on the rainbow local effect according to claim 5 is downloaded wave filter, it is characterized in that: the xsect of said micro-nano fiber (1) is circle, D type or type rectangle.
7. the micro-nano fiber based on the rainbow local effect according to claim 6 is downloaded wave filter, it is characterized in that: the xsect of said micro-nano fiber (1) is for circular, and diameter is the 500-4000 nanometer; Metal grating periods lambda scope is the 100-300 nanometer, the high 5-1000 nanometer of the grid of raster unit 5, the grid width 30-100 nanometer of raster unit 5; Said raster unit (5) is to surround the circular ring structure unit of whole micro-nano fiber (1), or the semicircular ring structural unit of semi-surrounding raster unit (5).
8. the micro-nano fiber based on the rainbow local effect according to claim 7 is downloaded wave filter, it is characterized in that: said micro-nano fiber (1) be cylindrical or conical fiber.
9. the micro-nano fiber based on the rainbow local effect according to claim 6 is downloaded wave filter; It is characterized in that: the xsect of said micro-nano fiber (1) is the D type, and said metal grating structure is the rectangular raster structural unit that forms in the smooth one side of the side direction of D shape.
10. the micro-nano fiber based on the rainbow local effect according to claim 6 is downloaded wave filter; It is characterized in that: the xsect of said micro-nano fiber (1) is a type rectangle, and said metal grating structure is rectangular raster structural unit or type rectangular raster structural unit that the smooth two sides of rectangle micro-nano fiber side direction forms simultaneously that forms in the smooth one side of class rectangle micro-nano fiber side direction.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157934A (en) * | 2014-07-21 | 2014-11-19 | 南京航空航天大学 | Ultra wide band plasma filter provided with artificial surface |
| CN112068238A (en) * | 2020-09-07 | 2020-12-11 | 桂林电子科技大学 | Single stress element optical fiber chirped fiber Bragg grating and preparation method thereof |
Citations (3)
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| US20090303489A1 (en) * | 2006-07-13 | 2009-12-10 | Aston University | Surface Plasmons |
| CN102255121A (en) * | 2011-05-11 | 2011-11-23 | 东南大学 | Broadband slow wave system based on cylindrical line waveguide excitation |
| CN102436029A (en) * | 2011-12-27 | 2012-05-02 | 东南大学 | Flexible ultra-long surface plasmon polariton waveguide |
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- 2012-07-09 CN CN201210235922.1A patent/CN102768386B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090303489A1 (en) * | 2006-07-13 | 2009-12-10 | Aston University | Surface Plasmons |
| CN102255121A (en) * | 2011-05-11 | 2011-11-23 | 东南大学 | Broadband slow wave system based on cylindrical line waveguide excitation |
| CN102436029A (en) * | 2011-12-27 | 2012-05-02 | 东南大学 | Flexible ultra-long surface plasmon polariton waveguide |
Non-Patent Citations (2)
| Title |
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| LIN CHEN 等: "Trapping of surface-plasmon polaritons in a graded Bragg structure: Frequency-dependent spatially separated localization of the visible spectrum modes", 《PHYSICAL REVIEW B》 * |
| QIAOQIANG GAN 等: ""Rainbow" Trapping and Releasing at Telecommunication Wavelengths", 《PHYSICAL REVIEW LETTERS》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157934A (en) * | 2014-07-21 | 2014-11-19 | 南京航空航天大学 | Ultra wide band plasma filter provided with artificial surface |
| CN112068238A (en) * | 2020-09-07 | 2020-12-11 | 桂林电子科技大学 | Single stress element optical fiber chirped fiber Bragg grating and preparation method thereof |
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