CN108375836A - A kind of surface phasmon light forceps device - Google Patents
A kind of surface phasmon light forceps device Download PDFInfo
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- CN108375836A CN108375836A CN201810039011.9A CN201810039011A CN108375836A CN 108375836 A CN108375836 A CN 108375836A CN 201810039011 A CN201810039011 A CN 201810039011A CN 108375836 A CN108375836 A CN 108375836A
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- 239000002086 nanomaterial Substances 0.000 claims abstract description 55
- 230000005284 excitation Effects 0.000 claims abstract description 27
- 238000012544 monitoring process Methods 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 19
- 239000012528 membrane Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 230000010287 polarization Effects 0.000 claims description 19
- 230000003287 optical effect Effects 0.000 claims description 18
- 230000008878 coupling Effects 0.000 claims description 12
- 238000010168 coupling process Methods 0.000 claims description 12
- 238000005859 coupling reaction Methods 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 3
- 238000012576 optical tweezer Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000002070 nanowire Substances 0.000 description 7
- 238000003756 stirring Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000004611 spectroscopical analysis Methods 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
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- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000003574 free electron Substances 0.000 description 1
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- 210000003739 neck Anatomy 0.000 description 1
- 238000009828 non-uniform distribution Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/008—Surface plasmon devices
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Abstract
The present invention is suitable near field optics field, surface phasmon light forceps device is provided, including excitation light unit, surface phasmon excitation unit and scan control and monitoring unit, surface phasmon excitation unit includes the slide of metal-plated membrane, and pending dynamic manipulation is placed in the surface of slide with the micro-nano structure solution of directional-rotation；Vortex beams are incident to surface phasmon and excite unit by excitation light unit for generating vortex beams；Surface phasmon excitation unit is used to excite the surface phasmon vortex light field of convergence in the water termination of metal film and micro-nano structure solution respectively using vortex beams, is manipulated into Mobile state to the micro-nano structure in micro-nano structure solution by surface phasmon vortex light field and directional-rotation；Scan control and monitoring unit are used to monitor the dynamic manipulation of micro-nano structure and directional-rotation in real time.The embodiment of the present invention can realize that stablize capture and dynamic that micro-nano structure pinpoints in surface phasmon vortex light field manipulate.
Description
Technical field
The invention belongs near field optics field more particularly to a kind of surface phasmon light forceps devices.
Background technology
Optical eddy OV (Optical Vortices) is that one kind possessing helical phase and orbital angular momentum (Orbital
Angular Momenturn, OAM) special light beam, due to its peculiar property in recent years become one research hot spot.Optics
Vortex optical tweezer technology is widely used in always the optical manipulation field to microscopic species, and effect can be similar to an optics and pull
Hand.In recent years, based on micro-nano structure -- the phasmon structure of metal film structures is including nanotechnology, micro Process/making, light
The fields such as spectroscopy, sensing, catalysis, biotechnology and medical science have very important researching value and realistic meaning.
In traditional laser optical tweezer, as nano wire or the micro-nano structure of nanometer rods would generally be by two kinds of power in light field
Effect, i.e., the gradient force of generation is unevenly distributed by light intensity around nano wire, which normally behaves as attraction, and by
Nano wire normally behaves as repulsive force to the scattering of light with the scattering force generated, the scattering force is absorbed.It is generated when optical tweezer
When attraction is more than repulsive force, micro-nano structure will be captured by optical optical tweezers system.
In the prior art, metal micro-nanostructure due to the discontinuity in laser optical tweezer and is difficult to control, thus difficult
To realize that the capture of stablizing to it in three dimensions is manipulated with directional-rotation.
Invention content
Technical problem to be solved by the present invention lies in provide a kind of surface phasmon light forceps device, it is intended to solve existing
In technology, metal micro-nanostructure in laser optical tweezer discontinuity and be difficult to control, it is difficult to realize to it in three dimensions
Stablize capture with directional-rotation manipulate the problem of.
The invention is realized in this way a kind of surface phasmon light forceps device, including excitation light unit, surface etc. are from sharp
Member excitation unit and scan control and monitoring unit, the surface phasmon excitation unit include the slide of metal-plated membrane,
The micro-nano structure solution of pending dynamic manipulation and directional-rotation is placed in the surface of the slide；
The excitation light unit is incident to described surface etc. from sharp for generating vortex beams, and by the vortex beams
Member excitation unit；
The surface phasmon excites unit, for using the vortex beams respectively in the metal film and described micro-
The surface phasmon vortex light field that convergence is excited in the water termination of micro-nano structure solution, passes through the surface phasmon vortex light
Field is manipulated into Mobile state to the micro-nano structure in the micro-nano structure solution and directional-rotation；
The scan control and monitoring unit, it is real-time for being carried out to the dynamic manipulation of the micro-nano structure and directional-rotation
Monitoring.
Further, the excitation light unit includes laser, lens group, polarizing film, the first wave plate group, speculum and
Two wave plate groups：
Laser, the laser beam for generating preset wavelength, and the laser beam is incident to the lens group；
The directional light that collimation obtains is incident to by the lens group for carrying out beam-expanding collimation to incident laser beam
The polarizing film；
Polarization is obtained polarised light and is incident to described the by the polarizing film for carrying out Polarization Modulation to the directional light
One wave plate group；
The first wave plate group, for the polarised light to be modulated to circular polarization vortex beams, the circular polarization whirlpool that will obtain
Optically-active beam is incident on the speculum；
The speculum, for reflecting the circular polarization vortex beams into the second wave plate group；
The second wave plate group, for being modulated to obtain with higher order topological charge to the circular polarization vortex beams
Vortex beams, and the vortex beams are incident to the surface phasmon and excite unit.
Further, surface phasmon excitation unit include beam splitter, high-NA objective, scanning platform,
The slide of the slide of metal-plated membrane, the metal-plated membrane is placed on the scanning platform；
The beam splitter enters first light beam for the vortex beams to be divided into the first light beam and the second light beam
It is incident upon the high-NA objective；
The high-NA objective, the slide for first light beam to be incident on to the metal-plated membrane so that
First light beam excites the surface phasmon to be vortexed in the water termination of the metal film and the micro-nano structure solution
Light field is additionally operable to couple the reflected light of the micro-nano structure solution, and the coupling light obtained after coupling is through the beam splitter
It reflects into the scan control and monitoring unit；
The scanning platform excites the surface phasmon vortex light field and the manipulation micro-nano knot for dynamic regulation
The position of structure.
Further, the scan control and monitoring unit include optical filter, CCD image sensor and computer；
The optical filter passes the coupling optical transport after optical filtering to described image for filtering to the coupling light
Sensor CCD is imaged；
The computer is connected with described image sensor CCD and the scanning platform respectively, is used for real-time display institute
The image for stating CCD image sensor is additionally operable to control the movement of the scanning platform.
Further, the first wave plate group includes quarter-wave plate and vortex wave plate.
Further, the second wave plate group includes quarter-wave plate and vortex wave plate.
Compared with prior art, the present invention advantageous effect is：Surface phasmon excitation provided in an embodiment of the present invention
Unit includes the slide of metal-plated membrane, and the micro-nano structure solution of pending dynamic manipulation and directional-rotation is placed in the slide
Surface, excitation light unit generates vortex beams, after which is incident to surface phasmon excitation unit, respectively described
The surface phasmon vortex light field that convergence is excited in the water termination of metal film and the micro-nano structure solution, passes through the surface
Phasmon vortex light field is manipulated into Mobile state to the micro-nano structure in the micro-nano structure solution and directional-rotation, scan control
And monitoring unit monitors the dynamic manipulation of the micro-nano structure and directional-rotation in real time.The embodiment of the present invention utilizes surface
The near field electromagnetic field of phasmon vortex light field enhances and local characteristics, can amplified medium and metal micro-nanostructure in light field
The attraction being subject to, at the same using the orbital angular momentum characteristic of vortex beams come increase modulation metal micro-nanostructure in light field by
The dimension of power, to realize that stablize capture and dynamic that micro-nano structure pinpoints in surface phasmon vortex light field manipulate.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of surface phasmon light forceps device provided in an embodiment of the present invention；
Fig. 2 is a kind of detailed construction schematic diagram of surface phasmon light forceps device provided in an embodiment of the present invention；
Fig. 3 is surface phasmon vortex light field energy flow diagram provided in an embodiment of the present invention；
Fig. 4 is the schematic diagram of surface phasmon vortex operation micro-nano structure provided in an embodiment of the present invention.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Surface phasmon, which is a kind of local, to be intercoupled resonance institute shape in metal surface by free electron and incident photon
At a kind of mixed activation pattern, near field enhancing and surface local characteristic.Grinding about surface phasmon in recent years
Study carefully discovery, the near field electromagnetic field enhancing due to surface phasmon and Local Characteristic can enhance to medium and metal micro-nano knot
The attraction that structure is subject in light field, and can increase modulation metal micro-nanostructure using the orbital angular momentum characteristic of vortex beams and exist
The dimension of stress in light field, can realize including nano wire or nanometer rods pinpointed in surface phasmon field stablize capture with
Dynamic manipulates.
And novel surface phasmon light forceps device, it can realize and capture and dynamic behaviour are stablized to a variety of micro-nano structures
It is vertical.Metallic film surface excitation is converged at through high-NA objective generate surface phasmon vortex light using linearly polarized light beam
, it is propagated to optical axis center along metallic film surface, and two intensity of interference generation are high at center, symmetrically divide along polarization direction
The virtual probe of cloth, the extremely strong gradient force effect that micro-nano structure can be directed toward center in surface phasmon field by one,
It is attracted to center, based on the non-uniform Distribution of surface phasmon vortex distribution of light intensity, micro-nano structure both sides stress
It is uneven to act on the modulation, it can be achieved that its direction so as to cause torque.This surface phasmon optical tweezer is for a variety of materials
Expect, nano wire (stick) structure of sizes has good effect.
Based on above-mentioned surface phasmon optical tweezer technology, further realize micro-nano structure is accurately positioned, Yi Jilian
Continuous directional-rotation manipulation, can further realize and carry out the functions such as micro- stirring to microfluid, in nanotechnology, micro Process/system
Make, field of spectroscopy has very important researching value and realistic meaning.Position by changing tightly focused exciting light mutually excites
Surface phasmon rotational field, the wave vector direction of the surface phasmon vortex light field along the circumferential direction, due to surface etc. from swash
The both sides stress of the optics force effect of first vortex light field SPP (Surface Plasmon Polaritons), micro-nano structure is uneven
It weighs and realizes fixed point continuously-directional rotation manipulation, reach the function of micro- stirring.
Based on above-mentioned principle, an embodiment of the present invention provides a kind of surface phasmon light forceps device as shown in Figure 1, packets
It includes excitation light unit 101, surface phasmon excitation unit 102 and scan control and monitoring unit 103, surface phasmon swashs
Described in the micro-nano structure solution of the slide that bill member 102 includes metal-plated membrane, pending dynamic manipulation and directional-rotation is placed in
The surface of slide；
Light unit 101 is excited, surface phasmon excitation is incident to for generating vortex beams, and by the vortex beams
Unit 102；
Surface phasmon excites unit 102, for using the vortex beams respectively in the metal film and described micro-
The surface phasmon vortex light field that convergence is excited in the water termination of micro-nano structure solution, passes through the surface phasmon vortex light
Field is manipulated into Mobile state to the micro-nano structure in the micro-nano structure solution and directional-rotation；
Scan control and monitoring unit 103, it is real-time for being carried out to the dynamic manipulation of the micro-nano structure and directional-rotation
Monitoring.
Further, as shown in Fig. 2, excitation light unit 101 includes laser 1, lens group 2, polarizing film 3, the first wave plate
Group 4, speculum 5 and the second wave plate group 6：Laser 1, the laser beam for generating preset wavelength, and by the laser beam
It is incident to lens group 2；Lens group 2, for carrying out beam-expanding collimation to incident laser beam, the directional light that collimation is obtained is incident
To polarizing film 3；Polarization is obtained polarised light and is incident to the first wave plate by polarizing film 3 for carrying out Polarization Modulation to the directional light
Group 4；First wave plate group 4 enters obtained circular polarization vortex beams for the polarised light to be modulated to circular polarization vortex beams
It is mapped to speculum 5；Speculum 5, for reflecting the circular polarization vortex beams into the second wave plate group 6；Second wave plate group 6 is used
In being modulated to obtain the vortex beams with higher order topological charge, the vortex beams that will be obtained to the circular polarization vortex beams
It is incident to surface phasmon excitation unit 102.
In the present embodiment, laser 1 can be according to the laser beam for requiring to send out different wave length, 4 He of the first wave plate group
Second wave plate group 6 is formed by quarter-wave plate and vortex wave plate combined.
Surface phasmon excitation unit 102 includes beam splitter 7, high-NA objective 8, scanning platform 9, is coated with metal
The slide 10 of the slide 10 of film, metal-plated membrane is placed on scanning platform 9；Beam splitter 7, for being divided into the vortex beams
First light beam is incident to high-NA objective 8 by the first light beam and the second light beam；High-NA objective 8, being used for will
First light beam is incident on the slide 10 of metal-plated membrane so that first light beam is in the metal film and the micro-nano knot
The surface phasmon vortex light field is excited in the water termination of structure solution, is additionally operable to the reflected light of the micro-nano structure solution
It is coupled, the coupling light obtained after coupling is reflected through beam splitter 7 into scan control and monitoring unit 103；Scanning platform 9 is used
The position of the surface phasmon vortex light field and the manipulation nanostructure is excited in dynamic regulation.In the present embodiment,
Beam splitter 7 can realize above-mentioned function using semi-permeable and semi-reflecting mirror, more specifically, 7 slant setting of beam splitter, with horizontal direction
Angle be 45 degree.
Scan control and monitoring unit 103 include optical filter 11, CCD image sensor 12 and computer 13；Optical filter 11,
For filtering to the coupling light, the coupling optical transport after optical filtering is imaged to CCD image sensor 12；Computer
13, it is connected respectively with CCD image sensor 12 and scanning platform 9, is used for the image of real-time display CCD image sensor 12
Picture is additionally operable to the movement of control scanning platform 9.
Specifically, it is mounted with scanning platform control system and monitoring system in scan control and monitoring unit 103, it can be with
Scanning platform 9 is controlled by the scanning platform control system, and is realized to dynamic operating situation by monitoring system
Monitoring in real time.
In the present embodiment, vortex beams can be constituted to form table after the focusing of high-NA objective 8 in metal membrane interface
Face phasmon vortex light field, the surface phasmon vortex light field can realize nanometer to micro-meter scale micro-nano structure it is steady
Fixed capture is manipulated with directional-rotation, the effect of scan control and the single 103 yuan of optical forces by surface phasmon light field of monitoring
And the position of laser beam mutually regulate and control to realize micro-nano structure is accurately positioned, pivoting, realize and liquid micro- stirs
Function is mixed, and realizes simultaneously and the motion state of micro-nano structure is observed in real time, the surface etc. generated in the embodiment of the present invention
From excimer vortex light field carry orbital angular momentum, due to the conservation of momentum, the momentum of photon is transmitted on nano wire, to generate around
Axis rotates, and then realizes the functions such as stirring.And the surface etc. provided in an embodiment of the present invention based on micro-nano structure-metal film structures
From excimer light forceps device including necks such as nanotechnology, micro Process/making, spectroscopy, catalysis, biotechnology and medical sciences
Domain has very important researching value and realistic meaning.
In inventive embodiments, by changing the position phase for the laser beam that laser generates, different surfaces etc. can be excited
From excimer vortex light field, by excite different surface phasmon vortex light fields can realize positioning to micro-nano structure, around
Axis rotate and micro- agitating function, the wave vector direction of surface phasmon vortex light field along the circumferential direction, as shown in Figure 3.
Micro-nano structure in surface phasmon vortex light field by surface phasmon vortex light field due to being caused
Coulomb force effect and be captured and stablize change in virtual probe position laser beam position mutually make micro-nano structure both sides by
Power is uneven and realizes the manipulation of rotation, as shown in figure 4, the white stick in Fig. 4 indicates nano wire or nanometer rods.Change and is vortexed
The orientation manipulation of micro-nano structure can be realized in the topological charge characteristic of light beam.What the process that dynamic manipulates can be connected by computer 13
CCD image sensor 12 detects in real time, by carrying out high-precision control to scanning platform 9, may be implemented to single nanometer
The precise manipulation of line (stick).
Surface phasmon light forceps device provided in an embodiment of the present invention passes through vortex beams excitating surface phasmon whirlpool
Optically-active field, which can realize stablizes capture and directional-rotation to micro-nano structure, flat by scanning
The position of structure is not pressed in platform control, can further realize the functions such as the stirring to microfluidic liquid.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (6)
1. a kind of surface phasmon light forceps device, which is characterized in that excite unit including excitation light unit, surface phasmon
With scan control and monitoring unit, the surface phasmon excitation unit includes the slide of metal-plated membrane, pending dynamic
The micro-nano structure solution of manipulation and directional-rotation is placed in the surface of the slide；
The vortex beams for generating vortex beams, and are incident to the surface phasmon and swashed by the excitation light unit
Bill member；
The surface phasmon excites unit, for utilizing the vortex beams respectively in the metal film and the micro-nano knot
The surface phasmon vortex light field that convergence is excited in the water termination of structure solution, passes through the surface phasmon vortex light field pair
Micro-nano structure in the micro-nano structure solution is manipulated into Mobile state and directional-rotation；
The scan control and monitoring unit, for being supervised in real time to the dynamic manipulation of the micro-nano structure and directional-rotation
It surveys.
2. surface phasmon light forceps device as described in claim 1, which is characterized in that the excitation light unit includes laser
Device, lens group, polarizing film, the first wave plate group, speculum and the second wave plate group：
Laser, the laser beam for generating preset wavelength, and the laser beam is incident to the lens group；
The directional light that collimation obtains is incident to described by the lens group for carrying out beam-expanding collimation to incident laser beam
Polarizing film；
Polarization is obtained polarised light and is incident to the first wave by the polarizing film for carrying out Polarization Modulation to the directional light
Piece group；
The first wave plate group, for the polarised light to be modulated to circular polarization vortex beams, the circular polarization vortex light that will obtain
Beam is incident on the speculum；
The speculum, for reflecting the circular polarization vortex beams into the second wave plate group；
The second wave plate group obtains the vortex with higher order topological charge for being modulated to the circular polarization vortex beams
Light beam, and the vortex beams are incident to the surface phasmon and excite unit.
3. surface phasmon light forceps device as described in claim 1, which is characterized in that the surface phasmon excitation is single
Member includes the slide of beam splitter, high-NA objective, scanning platform, metal-plated membrane, and the slide of the metal-plated membrane is put
It sets on the scanning platform；
First light beam is incident to by the beam splitter for the vortex beams to be divided into the first light beam and the second light beam
The high-NA objective；
The high-NA objective, the slide for first light beam to be incident on to the metal-plated membrane so that described
First light beam excites the surface phasmon vortex light field in the water termination of the metal film and the micro-nano structure solution,
It is additionally operable to couple the reflected light of the micro-nano structure solution, the coupling light obtained after coupling enters through the beam splitter reflection
The scan control and monitoring unit；
The scanning platform excites the surface phasmon vortex light field for dynamic regulation and manipulates the micro-nano structure
Position.
4. surface phasmon light forceps device as claimed in claim 3, which is characterized in that the scan control and monitoring unit
Including optical filter, CCD image sensor and computer；
The optical filter, for filtering to the coupling light, by the coupling optical transport after optical filtering to described image sensor
CCD is imaged；
The computer is connected with described image sensor CCD and the scanning platform respectively, for scheming described in real-time display
As the image of sensor CCD, it is additionally operable to control the movement of the scanning platform.
5. surface phasmon light forceps device as claimed in claim 2, which is characterized in that the first wave plate group includes four points
One of wave plate and vortex wave plate.
6. surface phasmon light forceps device as claimed in claim 2, which is characterized in that the second wave plate group includes four points
One of wave plate and vortex wave plate.
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| CN201810039011.9A CN108375836A (en) | 2018-01-16 | 2018-01-16 | A kind of surface phasmon light forceps device |
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Cited By (9)
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| CN109243660A (en) * | 2018-09-19 | 2019-01-18 | 深圳大学 | A kind of SPP light forceps device based on chiral dependence lens excitation |
| CN109683327A (en) * | 2018-12-06 | 2019-04-26 | 中国工程物理研究院激光聚变研究中心 | The shaping of light beam focal spot and kinetic-control system and method based on plasma regulation |
| CN110031924A (en) * | 2019-04-28 | 2019-07-19 | 长春理工大学 | A kind of method and system for realizing tunable surface phasmon frequency dividing |
| CN110361364A (en) * | 2019-07-29 | 2019-10-22 | 中国科学院微电子研究所 | A kind of micro-nano structure imaging method and device |
| CN110625246A (en) * | 2019-10-14 | 2019-12-31 | 深圳大学 | Optical tweezers printing device for machining micro-nano structure |
| CN112859354A (en) * | 2021-03-01 | 2021-05-28 | 江苏科技大学 | Laser cleaning device based on light field regulation and control technology |
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| CN117075354A (en) * | 2023-09-14 | 2023-11-17 | 上海交通大学 | Device for generating high contrast relativity vortex rotation and space wave front diagnosis method |
| RU2807969C1 (en) * | 2023-09-06 | 2023-11-21 | Федеральное государственное бюджетное научное учреждение "Федеральный исследовательский центр "Красноярский научный центр Сибирского отделения Российской академии наук" | Method for creating optical tweezers with configurable array of vortex laser beams |
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