CN207351900U - 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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- CN207351900U CN207351900U CN201720489861.XU CN201720489861U CN207351900U CN 207351900 U CN207351900 U CN 207351900U CN 201720489861 U CN201720489861 U CN 201720489861U CN 207351900 U CN207351900 U CN 207351900U
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Abstract
The utility model 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 to record and analyze the Whispering-gallery-mode transmission spectrum for the coupled system output terminal being made of conical fiber and blending agent microcavity；The blending agent microcavity plates high refractive index layer by optical microcavity surface and forms, and has plasma nano particulate on the surface of blending agent microcavity, and blending agent microcavity is placed among measurand.The utility model has the advantages such as compact-sized, high sensitivity, fast response time, has potential using value in the micro detection field in real time of biochemistry.
Description
Technical field
It the utility model is related to technical field of optical fiber sensing, more particularly to surface plasma enhanced blending agent echo
Wall pattern microcavity sensors.
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 the requirement of higher.
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, have without sample to be tested be marked, sensitivity height etc.
Advantage.SPR effects are a kind of optical phenomenas, and evanescent wave is incident to 3 surface of plasma nano particulate, are caused on the surface in ladder
The distribution of electron's density of arrangement is spent, forms plasma oscillation.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 influenced by following factor：First, variations in refractive index is to resonant wavelength
Influence, second, the conversion ratio of plasma resonance wavelength.Traditional spr sensor is since infrared wavelength loss is big, transmission range
It is short, however it remains the deficiencies of decay is big, interaction intensity is limited part.
Numerous researchs have shown that optical microcavity has high q-factor characteristic, its intracavitary photon lifetime length, optical power density are big, light field
Have in faint change of the Whispering-gallery-mode resonance to external physical quantity that microcavity inner total reflection is transmitted with interference formation 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. was logical
The drift of monitoring microcavity sensors output terminal resonant frequency is crossed, realizes the detection of inhibition of HIV particulate.SPR is combined with microcavity,
Its sensing sensitivity can be further improved.2014, Zhang Xingwang et al. was golden using the evanscent field excitation nano on micro- bottle of chamber surface
Grain, makes the microcavity sensors sensitivity based on SPR effects improve about 16 times.However, for common prefect dielectric microcavity, in its table
Face increase metallic particles can increase microcavity surface scattering, so as to reduce microcavity Q values, limit the further of transducer sensitivity
Lifting.
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 the requirement of higher.There is still a need for integrated structure and material improve existing sensor
Sensitivity.
Utility model content
The utility model is directed to shortcoming existing in the prior art, it is proposed that a kind of surface plasma enhanced blending agent
Whispering-gallery-mode microcavity sensors.The sensor is that the mode that high refractive index layer 2 is plated on prefect dielectric microcavity surface constructs high q-factor
Blending agent microcavity, then make its surface attachment surface plasma nano particulate 3, blending agent microcavity Whispering-gallery-mode is resonated
Enhancement effect is combined with SPR effects, makes full use of the extremely sensitive of the external boundary's physical quantity of blending agent microcavity Echo Wall mould field
The advantage of characteristic and SPR local enhancement effects realizes that high sensitivity senses.All devices of the utility model use all -fiber coupling
Conjunction form, has the advantages such as compact-sized, high sensitivity, fast response time, has in the micro detection field in real time of biochemistry
Potential application value.
The utility model is adopted the technical scheme that the microcavity sensors include tunable laser to reach the effect above
Device, Polarization Controller 1, conical fiber 5, blending agent microcavity, plasma nano particulate 3, photodetector, it is described tunable
The laser of laser output is coupled into blending agent microcavity by conical fiber 5, and forms echo wall die in its inner total reflection
Formula resonates；Polarization Controller 1 is used for the laser polarization state of control input conical fiber 5；Photodetector is used to record and analyze
The Whispering-gallery-mode transmission spectrum for the coupled system output terminal being made of conical fiber 5 and blending agent microcavity；The blending agent
Microcavity plates high refractive index layer 2 by optical microcavity surface and forms, and has plasma nano on the surface of blending agent microcavity
Particulate 3, blending agent microcavity are placed among measurand.
As the further prioritization scheme of the utility model, the blending agent microcavity is circle symmetrical structure.
As the further prioritization scheme of the utility model, the round symmetrical structure includes Microsphere Cavities, micro-loop chamber, micro- disk
Chamber, micro-pipe chamber, micro-loop core cavity, microvesicle chamber.
As a kind of surface plasma enhanced blending agent Whispering-gallery-mode microcavity sensing described in the utility model
The further prioritization scheme of device, it is in microcavity inner surface by plated film mode that the optical microcavity surface, which plates high refractive index layer 2,
Or outer surface forms high refractive index layer 2.
As a kind of surface plasma enhanced blending agent Whispering-gallery-mode microcavity sensing described in the utility model
The further prioritization scheme of device, the interior table of microcavity is referred on the surface of the blending agent microcavity with plasma nano particulate 3
Face or proximity at least adhere to a plasma nano particulate 3, with excitating surface plasma effect.
The utility model compared with prior art, is had the advantages that using above technical scheme：
(1) the utility model plates the construction blending agent microcavity of 2 mode of high refractive index layer using prefect dielectric microcavity surface,
Q values with higher, microcavity surface evanscent field is stronger, increases with external physical quantity interaction intensity and time, improves sensitive
Degree；
(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 utility model use all -fiber coupled mode, have compact-sized, high sensitivity, response speed
The advantage such as fast is spent, there is potential application value in the micro detection field in real time of biochemistry.
Brief description of the drawings
Fig. 1 is surface plasma enhanced blending agent Whispering-gallery-mode microcavity sensors structure diagram.
Identifier declaration：1- Polarization Controllers；2- high refractive index layers；3- plasma nano particulates；4- Whispering-gallery-modes
Microcavity；5- conical fibers.
Fig. 2 is different microcavitys after excitating surface plasma effect with the Whispering-gallery-mode field strength Degree distributions of radius change
Than figure, wherein, dotted line is prefect dielectric microcavity, and solid line is blending agent microcavity.
Embodiment
The technical solution of the utility model is described in further detail below in conjunction with the accompanying drawings：
The utility model is the method using Whispering-gallery-mode blending agent microcavity excitating surface plasma effect, is utilized
Its sensitivity characteristic to extraneous physical field minor variations realizes sensor measuring, with reference to high q-factor blending agent microcavity Whispering-gallery-mode
The advantage of resonant check and surface plasma local enhancement effect improves sensing sensitivity, accurate to test being tested around microcavity
Physical quantity.Just the concrete technical scheme of the utility model is briefly described below.
It is as shown in Figure 1 the structure diagram of the utility model, a kind of surface plasma enhanced blending agent echo
Wall pattern microcavity sensors, including tunable laser, Polarization Controller 1, conical fiber 5, blending agent microcavity, plasma
Nanoparticle 3, photodetector.The light of tunable laser output is coupled into blending agent microcavity simultaneously by conical fiber 5
Whispering-gallery-mode resonance is formed in its inner total reflection；Polarization Controller 1 is used for the laser polarization state of control input conical fiber 5；
Photodetector is used for the Whispering-gallery-mode transmission for recording and analyzing conical fiber-blending agent microcavity coupling device output terminal
Spectrum；
Blending agent microcavity plates high refractive index layer 2 by optical microcavity and forms, blending agent microcavity surface with wait from
Daughter nanoparticle 3, microcavity is by the parcel such as air or biochemical liquid.Whispering-gallery-mode microcavity 4 inherently has high Q values, energy
The advantages of metric density is high, by building blending agent microcavity, forms in 2 both sides of high refractive index layer and is totally reflected, further improve
The Q values of echo wall die microcavity, improve energy density, extend photon lifetime, and microcavity surface evanscent field is stronger so as to strengthen its excitation
The ability of surface plasma bulk effect, increases with external physical quantity interaction intensity and time, improves sensitivity.Mating surface
Plasma effect, the small change of sensor surrounding environment can all cause the change of microcavity surface effective refractive index and optical field distribution
Change, so as to cause the change of Whispering-gallery-mode resonance spectrum.Detected by photodetector and analyze resonance spectral property, you can with reality
Now to the sensing testing of determinand.
If Fig. 2 is the variation relation along 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
Comparison diagram of the wall pattern field intensity with microcavity with radius distribution.As seen from the figure, 4 surface of mixed structure Whispering-gallery-mode microcavity etc. from
Daughter effect excitation distribution of light intensity is significantly strengthened.
When measured matter and the blending agent microcavity Echo Wall mould field interaction of SPR enhancings, optical field distribution changes, defeated
The change of intensity or centre wavelength, therefore the surface plasma that the utility model is proposed will occur for the laser resonance spectral line gone out
Enhanced blending agent Whispering-gallery-mode microcavity sensors have extremely highly sensitive advantage.
Specific embodiments described above, the purpose of this utility model, technical solution and beneficial effect have been carried out into
The detailed description of one step, it should be understood that the foregoing is merely the specific embodiment of the utility model, and be not used to
Limit the scope of the utility model, any those skilled in the art, before the design of the utility model and principle is not departed from
Made equivalent variations and modification are put, the scope of the utility model protection should all be belonged to.
Claims (5)
1. a kind of surface plasma enhanced blending agent Whispering-gallery-mode microcavity sensors, it is characterised in that the microcavity passes
Sensor includes tunable laser, Polarization Controller (1), conical fiber (5), blending agent microcavity, plasma nano particulate
(3), photodetector, the laser of the tunable laser output are coupled into blending agent microcavity by conical fiber (5),
And form Whispering-gallery-mode resonance in its inner total reflection；The laser that Polarization Controller (1) is used for control input conical fiber (5) is inclined
Polarization state；Photodetector is used to recording and analyzing the coupled system output terminal being made of conical fiber (5) and blending agent microcavity
Whispering-gallery-mode transmission spectrum；The blending agent microcavity plates high refractive index layer (2) by optical microcavity surface and forms, mixing
Has plasma nano particulate (3) on the surface of medium microcavity, 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
Sign is that 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
Sign is that 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
Sign is that it is in microcavity inner surface or outer surface by plated film mode that the optical microcavity surface, which plates high refractive index layer (2),
Form high refractive index layer (2).
5. surface plasma enhanced blending agent Whispering-gallery-mode microcavity sensors according to claim 1, it is special
Sign is, refers to the inner surface or appearance of microcavity on the surface of the blending agent microcavity with plasma nano particulate (3)
A plasma nano particulate (3) is nearby at least adhered in face, with excitating surface plasma effect.
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| CN201720489861.XU CN207351900U (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 (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107202774A (en) * | 2017-05-05 | 2017-09-26 | 南京邮电大学 | A kind of surface plasma enhanced blending agent Whispering-gallery-mode microcavity sensors |
| CN108844468A (en) * | 2018-06-01 | 2018-11-20 | 广东工业大学 | A kind of displacement sensing method based on the multistage axial mode Combined Calculation of Echo Wall microcavity |
| CN109041401A (en) * | 2018-07-31 | 2018-12-18 | 深圳大学 | X-SPP nanometers of Whispering-gallery-mode electron-hole plasma structures |
| CN110650577A (en) * | 2019-09-27 | 2020-01-03 | 北京石油化工学院 | Ionization device and method using whispering gallery mode optical microcavity |
-
2017
- 2017-05-05 CN CN201720489861.XU patent/CN207351900U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107202774A (en) * | 2017-05-05 | 2017-09-26 | 南京邮电大学 | A kind of surface plasma enhanced blending agent Whispering-gallery-mode microcavity sensors |
| CN108844468A (en) * | 2018-06-01 | 2018-11-20 | 广东工业大学 | A kind of displacement sensing method based on the multistage axial mode Combined Calculation of Echo Wall microcavity |
| CN108844468B (en) * | 2018-06-01 | 2020-06-19 | 广东工业大学 | Displacement sensing method based on echo wall micro-cavity multi-order axial mode joint calculation |
| CN109041401A (en) * | 2018-07-31 | 2018-12-18 | 深圳大学 | X-SPP nanometers of Whispering-gallery-mode electron-hole plasma structures |
| CN110650577A (en) * | 2019-09-27 | 2020-01-03 | 北京石油化工学院 | Ionization device and method using whispering gallery mode optical microcavity |
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