CN107202774A - A kind of surface plasma enhanced blending agent Whispering-gallery-mode microcavity sensors - Google Patents
A kind of surface plasma enhanced blending agent Whispering-gallery-mode microcavity sensors Download PDFInfo
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- CN107202774A CN107202774A CN201710310216.1A CN201710310216A CN107202774A CN 107202774 A CN107202774 A CN 107202774A CN 201710310216 A CN201710310216 A CN 201710310216A CN 107202774 A CN107202774 A CN 107202774A
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- 238000002156 mixing Methods 0.000 title claims abstract description 56
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 54
- 239000000835 fiber Substances 0.000 claims abstract description 17
- 230000003287 optical effect Effects 0.000 claims abstract description 14
- 230000010287 polarization Effects 0.000 claims abstract description 10
- 238000000411 transmission spectrum Methods 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 claims description 21
- 239000004005 microsphere Substances 0.000 claims description 6
- 239000002105 nanoparticle Substances 0.000 claims description 3
- 230000005622 photoelectricity Effects 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 18
- 230000008901 benefit Effects 0.000 abstract description 9
- 238000011897 real-time detection Methods 0.000 abstract description 3
- 230000004044 response Effects 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 4
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- 230000007423 decrease Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012913 prioritisation Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000002198 surface plasmon resonance spectroscopy Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000003574 free electron Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N21/552—Attenuated total reflection
- G01N21/553—Attenuated total reflection and using surface plasmons
- G01N21/554—Attenuated total reflection and using surface plasmons detecting the surface plasmon resonance of nanostructured metals, e.g. localised surface plasmon resonance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
Abstract
The invention discloses a kind of surface plasma enhanced blending agent Whispering-gallery-mode microcavity sensors, including tunable laser, Polarization Controller, conical fiber, blending agent microcavity, plasma nano particulate, photodetector, the laser of the tunable laser output is coupled into blending agent microcavity by conical fiber, and forms Whispering-gallery-mode resonance in its inner total reflection；Polarization Controller is used for the laser polarization state of control input conical fiber；Photodetector is used for the Whispering-gallery-mode transmission spectrum for recording and analyzing the coupled system output end being made up of conical fiber and blending agent microcavity；The blending agent microcavity plates high refractive index layer by optical microcavity surface and constituted, and has plasma nano particulate on the surface of blending agent microcavity, and blending agent microcavity is placed among measurand.The present invention has the advantages such as compact conformation, sensitivity height, fast response time, has potential application value in the micro real-time detection field of biochemistry.
Description
Technical field
The present invention relates to technical field of optical fiber sensing, more particularly to surface plasma enhanced blending agent echo wall die
Decline cavity sensor.
Background technology
With the development of Modern biochemical, there is the detection scene of more and more atomic little particulates, to optical sensor
Sensitivity propose higher requirement.
Surface plasma body resonant vibration (Surface Plasmon Resonance, SPR) biochemical sensor is a kind of base
In the optical sensor of metal surface plasmon resonance effect, with without testing sample be marked, sensitivity height etc.
Advantage.SPR effects are a kind of optical phenomenas, and evanescent wave is incident to plasma nano microparticle surfaces, are caused on the surface in ladder
The distribution of electron's density of arrangement is spent, plasma oscillation is formed.When incidence angle or wavelength meet specified conditions, evanescent wave frequency with
Free electron (plasma) frequency of microparticle surfaces vibration is identical, then the plasma of microparticle surfaces just absorbs the energy hair of incident light
Raw resonance, here it is SPR effects.
However, the sensitivity of plasma sensor is influenceed by following factor：One is variations in refractive index to resonant wavelength
Influence, two be the conversion ratio of plasma resonance wavelength.Traditional spr sensor is because infrared wavelength loss is big, transmission range
It is short, however it remains the weak points such as decay is big, interaction intensity is limited.
Numerous researchs have shown that optical microcavity has high q-factor characteristic, and its intracavitary photon lifetime length, optical power density are big, light field
Microcavity inner total reflection transmit with interfere formed Whispering-gallery-mode resonance to external world physical quantity faint change have it is very strong
Sensing capability, using the teaching of the invention it is possible to provide high accuracy, high sensitivity, quick, unmarked detection means.2008, Vollmer et al. passed through
The drift of microcavity sensors output end resonant frequency is monitored, the detection of inhibition of HIV particulate is realized.SPR is combined with microcavity, energy
It is enough further to improve its sensing sensitivity.2014, Zhang Xingwang et al. utilized the evanscent field excitation nano goldc grains on micro- bottle of chamber surface,
The microcavity sensors sensitivity based on SPR effects is set to improve about 16 times.However, for common prefect dielectric microcavity, on its surface
Increase metallic particles can increase microcavity surface scattering, so as to reduce microcavity Q values, limit further carrying for transducer sensitivity
Rise.
With modern biomedical, the development of biochemical investigation, essence of various micro, the test association areas to optical sensor
Degree, detection efficiency and sensitivity propose higher requirement.There is still a need for integrated structure and material improve existing sensor
Sensitivity.
The content of the invention
A kind of shortcoming that the present invention exists for prior art, it is proposed that surface plasma enhanced blending agent echo
Wall pattern microcavity sensors.The sensor is that the mode for plating high refractive index layer on prefect dielectric microcavity surface constructs high q-factor mixing
Medium microcavity, then make its surface attachment surface plasma nano particulate, by blending agent microcavity Whispering-gallery-mode resonant check
Effect is combined with SPR effects, makes full use of the extremely sensitive characteristic of blending agent microcavity Echo Wall mould field physical quantity to external world
And the advantage of SPR local enhancement effects realizes that high sensitivity is sensed.All devices of the present invention use all -fiber coupled mode, tool
There are the advantages such as compact conformation, sensitivity height, fast response time, there is potential application in the micro real-time detection field of biochemistry
Value.
To reach that the effect above is adopted the technical scheme that, the microcavity sensors include tunable laser, inclined to the present invention
Shake controller, conical fiber, blending agent microcavity, plasma nano particulate, photodetector, and the tunable laser is defeated
The laser gone out is coupled into blending agent microcavity by conical fiber, and forms Whispering-gallery-mode resonance in its inner total reflection；Partially
The controller that shakes is used for the laser polarization state of control input conical fiber；Photodetector be used to record and analyze by conical fiber and
The Whispering-gallery-mode transmission spectrum for the coupled system output end that blending agent microcavity is constituted；The blending agent microcavity is by optical microcavity
Surface, which is plated on high refractive index layer composition, the surface of blending agent microcavity, has plasma nano particulate, and blending agent is micro-
Chamber is placed among measurand.
As the further prioritization scheme of the present invention, the blending agent microcavity is circle symmetrical structure.
As the further prioritization scheme of the present invention, the round symmetrical structure includes Microsphere Cavities, micro-loop chamber, micro- disk chamber, micro-
Tube chamber, micro-loop core cavity, microvesicle chamber.
Enter as a kind of surface plasma enhanced blending agent Whispering-gallery-mode microcavity sensors of the present invention
One-step optimization scheme, it is in microcavity inner surface or appearance by plated film mode that the optical microcavity surface, which plates high refractive index layer,
Face forms high refractive index layer.
Enter as a kind of surface plasma enhanced blending agent Whispering-gallery-mode microcavity sensors of the present invention
Refer to the inner surface or outer of microcavity on one-step optimization scheme, the surface of the blending agent microcavity with plasma nano particulate
Near surface at least adheres to a plasma nano particulate, with excitating surface plasma effect.
The present invention compared with prior art, is had the advantages that using above technical scheme：
(1) present invention plates the construction blending agent microcavity of high refractive index layer mode using prefect dielectric microcavity surface, has
Higher Q values, microcavity surface evanscent field is stronger, increases with external physical quantity interaction intensity and time, improves sensitivity；
(2) nano particle is invested into blending agent microcavity surface, enhances surface SPR local field intensities, improve sensing
The sensitivity of device；
(3) all devices of the invention use all -fiber coupled mode, with compact conformation, sensitivity height, fast response time
Etc. advantage, there is potential application value in the micro real-time detection field of biochemistry.
Brief description of the drawings
Fig. 1 is surface plasma enhanced blending agent Whispering-gallery-mode microcavity sensors structural representation.
The surface plasma bulk effect comparison diagram that Fig. 2 is excited by common microcavity and blending agent microcavity.
Fig. 3 is Whispering-gallery-mode field strength Degree distributions of the different microcavitys after excitating surface plasma effect with radius change
Than figure, wherein, dotted line is prefect dielectric microcavity, and solid line is blending agent microcavity.
Embodiment
Technical scheme is described in further detail below in conjunction with the accompanying drawings：
The present invention is the method using Whispering-gallery-mode blending agent microcavity excitating surface plasma effect, right using its
The sensitivity characteristic of extraneous physical field minor variations realizes sensor measuring, with reference to the resonance of high q-factor blending agent microcavity Whispering-gallery-mode
The advantage of enhancing and surface plasma local enhancement effect improves the tested physics around sensing sensitivity, accurate test microcavity
Amount.The concrete technical scheme just to the present invention is briefly described below.
It is as shown in Figure 1 the structural representation of the present invention, a kind of surface plasma enhanced blending agent echo wall die
Decline cavity sensor, including tunable laser, Polarization Controller, conical fiber, blending agent microcavity, plasma nano are micro-
Grain, photodetector.The light of tunable laser output is coupled into blending agent microcavity and interior complete at it by conical fiber
Reflect to form Whispering-gallery-mode resonance；Polarization Controller is used for the laser polarization state of control input conical fiber；Photodetector
Whispering-gallery-mode transmission spectrum for recording and analyzing conical fiber-blending agent microcavity coupling device output end；
Blending agent microcavity plates high refractive index layer by optical microcavity and constituted, and blending agent microcavity surface has plasma
Body nanoparticle, microcavity is by the parcel such as air or biochemical liquid.Whispering-gallery-mode microcavity inherently has high q-factor, energy close
The high advantage of degree, by building blending agent microcavity, forms in high refractive index layer both sides and is totally reflected, further improve the Echo Wall
The Q values of mould microcavity, improve energy density, extend photon lifetime, and microcavity surface evanscent field is stronger so as to strengthen its excitating surface etc.
The ability of ion bulk effect, increases with external physical quantity interaction intensity and time, improves sensitivity.Mating surface plasma
Bulk effect, the small change of sensor surrounding environment can all cause the change of microcavity surface effective refractive index and optical field distribution, from
And cause the change of Whispering-gallery-mode resonance spectrum.Detected by photodetector and analyze resonance spectral property, you can with realization pair
The sensing testing of determinand.
It is illustrated in figure 2 the surface plasma bulk effect comparison diagram that common microcavity is excited with blending agent microcavity.Wherein
Left hand view is prefect dielectric microcavity, and right side is blending agent microcavity；(a) it is Microsphere Cavities equatorial plane mode distributions, (b) is that Microsphere Cavities are horizontal
The surface plasma bulk effect that magnification region is excited by microcavity in section mode distributions, figure.Two microcavity radiuses are 30 μm, are mixed
Close 0.3 μm of a layer thickness of cladding, the film layer of refractive index 2.38 on the outside of medium microcavity.Produce surface plasma bulk effect particulate be
Nano-scale gold particle, major axis 42nm, short axle 12nm, with microcavity outermost at a distance of 13nm.
If Fig. 3 is along variation relation of the Microsphere Cavities radial electric field intensity with Microsphere Cavities radius.Described in each parameter setting and Fig. 2
Unanimously, wherein, dotted line and solid line are respectively prefect dielectric microcavity and blending agent microcavity excitating surface plasma effect post echo
Wall pattern field intensity is with comparison diagram of the microcavity with radius distribution.As seen from the figure, mixed structure Whispering-gallery-mode microcavity surface etc. from
Daughter effect excites distribution of light intensity to be significantly strengthened.
During enhanced with the SPR blending agent microcavity Echo Wall mould field interaction of measured matter, optical field distribution changes, defeated
The change that intensity or centre wavelength will occur for the laser resonance spectral line gone out, therefore surface plasma enhancing proposed by the invention
Type blending agent Whispering-gallery-mode microcavity sensors have extremely highly sensitive advantage.
Specific embodiments described above, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Detailed description, should be understood that and the foregoing is only specific embodiments of the present invention, be not limited to this hair
Bright scope, any those skilled in the art, what is made on the premise of the design of the present invention and principle is not departed from is equal
Change and modification, all should belong to the scope of protection of the invention.
Claims (5)
1. a kind of surface plasma enhanced blending agent Whispering-gallery-mode microcavity sensors, it is characterised in that the microcavity is passed
Sensor includes tunable laser, Polarization Controller, conical fiber, blending agent microcavity, plasma nano particulate, photoelectricity and visited
Device is surveyed, the laser of the tunable laser output is coupled into blending agent microcavity by conical fiber, and is all-trans in it
Penetrate to form Whispering-gallery-mode resonance；Polarization Controller is used for the laser polarization state of control input conical fiber；Photodetector is used
In the Whispering-gallery-mode transmission spectrum for recording and analyzing the coupled system output end being made up of conical fiber and blending agent microcavity；Institute
State blending agent microcavity high refractive index layer plated by optical microcavity surface and constitute, on the surface of blending agent microcavity with wait from
Daughter nanoparticle, blending agent microcavity is placed among measurand.
2. surface plasma enhanced blending agent Whispering-gallery-mode microcavity sensors according to claim 1, it is special
Levy and be, the blending agent microcavity is circle symmetrical structure.
3. surface plasma enhanced blending agent Whispering-gallery-mode microcavity sensors according to claim 2, it is special
Levy and be, the round symmetrical structure includes Microsphere Cavities, micro-loop chamber, micro- disk chamber, micro-pipe chamber, micro-loop core cavity, microvesicle chamber.
4. surface plasma enhanced blending agent Whispering-gallery-mode microcavity sensors according to claim 1, it is special
Levy and be, the optical microcavity surface plates high refractive index layer to be formed in microcavity inner surface or outer surface by plated film mode
High refractive index layer.
5. surface plasma enhanced blending agent Whispering-gallery-mode microcavity sensors according to claim 1, it is special
Levy and be, refer to that the inner surface of microcavity or outer surface are attached with plasma nano particulate on the surface of the blending agent microcavity
Closely at least adhere to a plasma nano particulate, with excitating surface plasma effect.
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| CN201710310216.1A CN107202774A (en) | 2017-05-05 | 2017-05-05 | A kind of surface plasma enhanced blending agent Whispering-gallery-mode microcavity sensors |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107631998A (en) * | 2017-10-07 | 2018-01-26 | 六安市华海电子器材科技有限公司 | A kind of portable spectrometer and method for liquid detection |
| CN108051422A (en) * | 2017-11-21 | 2018-05-18 | 复旦大学 | A kind of trace explosive and drug detector and its application method |
| CN108801851A (en) * | 2018-05-25 | 2018-11-13 | 南京邮电大学 | A kind of micro liquid concentration sensor of thin-walled column symmetry microcavity |
| CN108896512A (en) * | 2018-07-18 | 2018-11-27 | 清华-伯克利深圳学院筹备办公室 | The detection device and method of microfluid |
| CN110068533A (en) * | 2019-05-05 | 2019-07-30 | 中北大学 | A kind of sensor based on high Q optical microcavity evanscent field |
| CN110908417A (en) * | 2019-12-09 | 2020-03-24 | 福建师范大学 | Device and method for realizing current regulation of resonance wavelength of optical microfluidic micro-bubble cavity |
| CN111555109A (en) * | 2020-04-16 | 2020-08-18 | 清华大学 | Dissipative gain coupled microcavity system |
| CN113008841A (en) * | 2021-02-26 | 2021-06-22 | 复旦大学 | Hydrogen sensor based on palladium-whispering gallery mode optical resonant cavity and preparation and application thereof |
| CN113448911A (en) * | 2021-06-03 | 2021-09-28 | 北京邮电大学 | Coherent light optimization computing device based on programmable optical hardware |
| CN114485985A (en) * | 2022-04-01 | 2022-05-13 | 哈尔滨理工大学 | Double-parameter optical fiber sensor with cascaded microsphere cavities |
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| US20040150818A1 (en) * | 1999-05-17 | 2004-08-05 | Armstrong Robert L. | Optical devices and methods employing nanoparticles, microcavities, and semicontinuous metal films |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107631998A (en) * | 2017-10-07 | 2018-01-26 | 六安市华海电子器材科技有限公司 | A kind of portable spectrometer and method for liquid detection |
| CN108051422B (en) * | 2017-11-21 | 2020-09-29 | 复旦大学 | Trace explosive and drug detector and using method thereof |
| CN108051422A (en) * | 2017-11-21 | 2018-05-18 | 复旦大学 | A kind of trace explosive and drug detector and its application method |
| CN108801851A (en) * | 2018-05-25 | 2018-11-13 | 南京邮电大学 | A kind of micro liquid concentration sensor of thin-walled column symmetry microcavity |
| CN108896512A (en) * | 2018-07-18 | 2018-11-27 | 清华-伯克利深圳学院筹备办公室 | The detection device and method of microfluid |
| CN110068533A (en) * | 2019-05-05 | 2019-07-30 | 中北大学 | A kind of sensor based on high Q optical microcavity evanscent field |
| CN110908417A (en) * | 2019-12-09 | 2020-03-24 | 福建师范大学 | Device and method for realizing current regulation of resonance wavelength of optical microfluidic micro-bubble cavity |
| CN111555109A (en) * | 2020-04-16 | 2020-08-18 | 清华大学 | Dissipative gain coupled microcavity system |
| CN111555109B (en) * | 2020-04-16 | 2021-07-06 | 清华大学 | Dissipative gain coupled microcavity system |
| CN113008841A (en) * | 2021-02-26 | 2021-06-22 | 复旦大学 | Hydrogen sensor based on palladium-whispering gallery mode optical resonant cavity and preparation and application thereof |
| CN113008841B (en) * | 2021-02-26 | 2022-08-23 | 复旦大学 | Hydrogen sensor based on palladium-whispering gallery mode optical resonant cavity and preparation and application thereof |
| CN113448911A (en) * | 2021-06-03 | 2021-09-28 | 北京邮电大学 | Coherent light optimization computing device based on programmable optical hardware |
| CN114485985A (en) * | 2022-04-01 | 2022-05-13 | 哈尔滨理工大学 | Double-parameter optical fiber sensor with cascaded microsphere cavities |
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Application publication date: 20170926 |