CN110095881A - A kind of vector vortex photogenerated device based on gouy phase - Google Patents
A kind of vector vortex photogenerated device based on gouy phase Download PDFInfo
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- CN110095881A CN110095881A CN201910294248.6A CN201910294248A CN110095881A CN 110095881 A CN110095881 A CN 110095881A CN 201910294248 A CN201910294248 A CN 201910294248A CN 110095881 A CN110095881 A CN 110095881A
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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
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
Abstract
The invention discloses a kind of vector vortex photogenerated device based on gouy phase, including two unpolarized transmission layers and two polarization transmission layers (2)；Wherein, one unpolarized transmission layer is interconnected to form an entirety with a corresponding polarization transmission layer (2), two unpolarized transmission layers and the opposite arrangement respectively of two polarization transmission layers (2), and two polarization transmission layers (2) are located inside setting.The present invention utilizes the vortex light of single polarization, substrate is polarized to it to be modulated, since the mode of the vector vortex light of generation is only related with incident light, so corresponding different vector optical modes can be generated for different incident lights, incident light allows to have radial structure, and the present invention remains unchanged when change incident light.
Description
Technical field
The invention belongs to optical technical fields, and in particular to a kind of vector vortex photogenerated device based on gouy phase.
Background technique
Vortex light is the structure light before having helicon.The polarisation distribution of general vortex light is uniformly, such as linear polarization, circle
Polarization etc., also referred to as scalar vortex light.The polarisation distribution of vector vortex light is become according to certain rules with the position of horizontal space
Change, is generally axisymmetricly distributed, also referred to as column symmetry vectorial field.
Studies have shown that when the vector vortex light of column symmetry is through high numerical aperture lens tightly focused, it is available the smallest poly-
Focal sphere symmetric points can be used to improve imaging resolution, plasma focus, nanoparticle manipulation etc. are used for, wherein in high-resolution
The application value of imaging field is especially prominent, Confocal laser endomicroscopy, two-photon microtechnic, second order resonance generate it is micro-,
There is embodiment in the technologies such as dark-field imaging.In addition, vector vortex light is in laser processing, remote sensing technology, Terahertz Technology, singular point light
Also there is application prospect worthy of expecting in the fields such as, data storage.
Measuring vortex light, there are many production methods, and improvement and innovation to production method are one of the research hotspots in field.
A kind of typical thinking is that preset chamber device is added in laser cavity to make the resonance wave of laser cavity output vector vortex optical mode.
This chamber device can be axial birefringent device or axial bidirectional color element, effect be to provide model selection function with
Basic mode ingredient is removed, the most just existing correlative study early in 1972, however rarely had the application and development of vector vortex light at that time, seldom
The generation of someone's concern vector vortex light.In recent years, the application potential of vector vortex light is gradually exploited, active vector is vortexed
Photogenerated causes to pay close attention to again.The production method of axial doublet refractor part is proposed again and is further improved in application cavity.Newly
Provide polarization mode selection device, such as tapered lens axial direction bidirectional color device, Brewster corner reflecting device also by
It developed.
Another thinking is to generate space not by converting those common space uniforms polarization (such as linear polarization) light
Uniform vector vortex light.Therefore, the device for possessing the polarization properties of spatial variations is generally required in this kind of scheme, is made
The light beam of process is by radial direction or angular polarization.This kind of device can be made by a variety of plane machining technologies, as electron beam is carved
Erosion, gray scale etching etc..It can have been bought at Optical element manufacturing quotient at the element of grade more now.The shortcomings that this kind of device
It is that the device customized can be only generated a kind of vector vortex light.
Other than the method that the above-mentioned polarising means with spatial variations generates, interferometry is also a kind of common generation vector whirlpool
The method of optically-active.Such methods Mach-Zender interferometer or sagnac interferometer and helical phase piece or space
The helical phase that optical modulator liquid crystal generates combines, and obtains vector vortex light with two single polarization vortex superpositions.But such side
Method is inevitably limited by interference stability, simultaneously because being related to panel type device, also by device on beam quality
Resolution ratio limitation.
Summary of the invention
The purpose of the present invention is to provide a kind of vector vortex photogenerated device based on gouy phase, can realize utilization
Single polarization vortex light generates the function of vector vortex light.The mode for the vector vortex light that this device generates is only related with incident light,
Therefore a device can be applied to the generation of most vector vortex light.This device does not include path interference device, in stability
On have greater advantage.
The present invention adopts the following technical scheme that realize:
A kind of vector vortex photogenerated device based on gouy phase, including two unpolarized transmission layers and two polarizations are thoroughly
Penetrate layer；Wherein, a unpolarized transmission layer is interconnected to form an entirety with a corresponding polarization transmission layer, and two non-inclined
Vibration transmission layer and the opposite arrangement respectively of two polarization transmission layers, and two polarization transmission layers are located inside setting.
A further improvement of the present invention lies in that unpolarized transmission layer selects plano-convex cylindrical lenses or phase Fresnel piece.
A further improvement of the present invention lies in that plano-convex cylindrical lenses or phase Fresnel piece can add focal length to incident light
For the converging action of f.Polarization transmission layer adds the converging action that focal length is f to left circularly polarized light, attached to right-circularly polarized light
Adding focal length is the disperse function of-f.Focal length of lens composite formula when being placed with zero distanceEvery side can be obtained
Combined total focal length be fL=f/2, fR=+∞.
A further improvement of the present invention lies in that when the distance d=f of left and right two parts opposite direction placement, for Left-hand circular polarization
Constitute a π gouy phase converter.The effect of π gouy phase converter is to realize | l > extremely |-l > overturning, | l > and |-l
> the vortex light that topological charge is l and-l is respectively indicated, vortex light topological charge takes arbitrary integer；To right-hand circular polarization ingredient without overturning
Effect.
A further improvement of the present invention lies in that the device can generate single mode vector vortex light, expression formula are as follows:
In formula, | L > expression Left-hand circular polarization, | R > expression right-hand circular polarization, γ are relative phase.
A further improvement of the present invention lies in that being additionally provided with articulamentum between two polarization transmission layers, and the length of articulamentum
Degree is d=nf, and n is the refractive index for connecting layer material in formula.
The present invention has following beneficial technical effect:
1, versatility: using the vortex light of single polarization, polarizing substrate to it and be modulated, since the vector of generation is vortexed
The mode of light is only related with incident light, so corresponding different vector optical modes can be generated for different incident lights, it is incident
Light allows to have radial structure, and the present invention remains unchanged when change incident light；
2, stability: device is operated by not needing progress path beam splitting conjunction beam in principle, without interferometer in system, therefore
It is better than various interferometer methods in practice in stability.It can further be designed to that integrated device makes it more
Add stabilization.
It 3, can linear superposition: being designed based on linear optics, the physical process that device is realized can be superimposed, and be applicable in it not only
In the generation of single vector vortex light, mixed state and superposition state can be applicable to.
4, it can inversely use: be designed based on linear optics, device can use inversely, realize vector vortex light to uniformly partially
The transformation of vibration vortex light.
Detailed description of the invention
Fig. 1 is the structure of device of the present invention and the converging action schematic diagram to Left-hand circular polarization；
Fig. 2 is the structure of device of the present invention and the effect schematic diagram to right-hand circular polarization；
Fig. 3 is tomograph and the function and effect signal of device of the present invention；
Fig. 4 is a kind of compact structure three-dimensional figure of device of the present invention；
Fig. 5 is polarization transmission layer fast axle arrangement schematic diagram；
Fig. 6 is the vector vortex photogenerated device signal containing light source.
Description of symbols:
1, plano-convex cylindrical lenses or phase Fresnel piece；2, polarization transmission layer；3, the polarisation distribution of even polarization light；4, it swears
Measure the polarisation distribution of vortex light；5, articulamentum.
Specific embodiment
The present invention is made further instructions below in conjunction with attached drawing.
A kind of vector vortex photogenerated device based on gouy phase provided by the invention, by two unpolarized transmission layers and
Two polarization transmission layers 2 form.Unpolarized transmission layer is by taking plano-convex cylindrical lenses 1 as an example.As shown in Figure 1, arrangement mode is two
Plano-convex cylindrical lenses and the opposite arrangement respectively of two polarization transmission layers.
For unpolarized transmission layer by taking plano-convex cylindrical lenses 1 as an example, it is f's that plano-convex cylindrical lenses can add focal length to incident light
Converging action, focal length of the present invention are the focal length of cylindrical lenses, i.e., only have converging action to the single direction of transverse plane.
The effect of polarization transmission layer 2 is that the converging action that focal length is f is added to left circularly polarized light, to right-circularly polarized light
The disperse function that additional focal length is-f.Focal length of lens composite formula when being placed with zero distanceIt can obtain each
The combined total focal length of side is fL=f/2, fR=+∞.It is inclined to Left-hand circular polarization and dextrorotation circle that Fig. 1 and Fig. 2 respectively shows device
The converging action of vibration.
In fig. 1-3, when the distance d=f that two parts opposite direction in left and right is placed, a π gouy is constituted for Left-hand circular polarization
Phase converter.The effect of π gouy phase converter is to realize | l > extremely |-l > overturning.For right-hand circular polarization then without turn
Parallel operation effect.
The present invention can also realize arbitrary gouy phase transition when changing the distance d that two parts opposite direction in left and right is placed
Device, wherein d=sin (Θ/2) f, wherein Θ is the gouy phase that the device introduces.
Present invention effect may be summarized to be | and l, L > → |-l, L >, | l, R > → | l, R >, in formula | L > expression Left-hand circular polarization,
| R > expression right-hand circular polarization.
General single mode vector vortex optical writable isγ is relative phase in formula.
And for the vortex light of even polarization, it can be expressed asForm, work according to the invention
With can be converted intoGenerate single mode vector vortex light.The three-dimensional structure of device
With function and effect as shown in figure 3, in figure 1 be plano-convex cylindrical lenses or phase Fresnel piece, 2 be polarization transmission layer, 3 for uniformly partially
The polarisation distribution of vibration light, 4 be the polarisation distribution of vector vortex light.
A kind of Extended forms of device of the present invention, that is, compact structure as shown in figure 4, in figure 1 be plano-convex cylindrical lenses
Layer, 2 be polarization transmission layer, and 5 be articulamentum.It is connected between each layer with the technology of non-damage type, the optical cement irradiated such as low-power.
In paraxial thin lens and in the case that air refraction is calculated by 1, according to Snell's law n1sinθ1=n2sinθ2, work as connection
Layer refractive index is n, θ1、θ2Respectively without, have an articulamentum when reflect the angle of light and interface normal, according to sin θ under paraxial approximation
≈ θ, tan θ ≈ θ, there is θ1≈nθ2, further according to geometrical relationshipThe actual range that light passes through in articulamentum,
I.e. the length of articulamentum 5 can be approximately d=nf, and n is the refractive index for connecting layer material in formula.The present invention compares the dry of effect same
Relate to the more convenient Miniaturization Design of device.Present invention application thin lens approximation calculates combined focal length and determines between the two parts of left and right
Distance, but need to be calculated according to refraction is theoretical stringent when not meeting approximate condition.
The present invention is not limited to constitute a π gouy phase converter, may be constructed any Gu when d is met certain condition
Her phase converter, d=sin (Θ/2) f in separate structure, d=nsin (Θ/2) f in compact structure, wherein Θ
The gouy phase introduced for the device.
Design philosophy of the present invention is not intended to limit radial structure, therefore is also applied for the vector vortex light of radial structure.Contain
The feature for having the vector vortex light of radial structure is the vector vortex light in no radial structureOn the basis of radial structure is added.Because radially and angularly basic vector is mutual in polar coordinate system
Mutually orthogonal, what is discussed in the content of present invention pertains only to angular coordinate without radial structure vector vortex light, therefore is added orthogonal to that
Radial coordinate will not influence and be discussed above.
Polarization transmission layer can be realized with materials such as liquid crystal polymer, nanometer panels in the present invention, it is characterized in that two
Orthogonal basement introduces the phase-modulation of conjugation respectively, this class model can be indicated by the spatial arrangement of fast axle.Fast axle and level
The introduced phase-modulation of the angle of reference direction is the Φ of φ=2, and wherein Φ=Φ (y) is the angle of crystallographic axis and horizontal direction, y
For plane ordinate.The Polarization Modulation phase that the required polarization transmission layer of the present invention is realized should have the convergence of similar cylindrical lenses to make
With can be written asTherefore the spatial arrangement of fast axle can be expressed asFig. 5 show fast axle row
Cloth schematic diagram.
Complete vector vortex photogenerated index path is as shown in Figure 6.Light source part can be laser or basic mode Gauss light
The device of vortex light can be generated with the combination of spatial light modulator etc..Light source can directly generate after device of the present invention
Corresponding vector vortex light.
Device of the present invention is linear optics device, according to electromagnetism field superposition theorem, is also applied for superposition state and mixes
The generation of state vector vortex light.
Further, the transformation of vector vortex light to even polarization vortex light may be implemented in reverse use of the invention.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure made by bright specification and accompanying drawing content or equivalent structure transformation are applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (6)
1. a kind of vector vortex photogenerated device based on gouy phase, which is characterized in that including two unpolarized transmission layers and
Two polarization transmission layers (2)；Wherein,
One unpolarized transmission layer is interconnected to form an entirety with a corresponding polarization transmission layer (2), and two unpolarized
Transmission layer and the opposite arrangement respectively of two polarization transmission layers (2), and two polarization transmission layers (2) are located inside setting.
2. a kind of vector vortex photogenerated device based on gouy phase according to claim 1, which is characterized in that the device
Part realizes Left-hand circular polarization ingredient | l > extremely |-l > overturning, | l > and |-l > respectively indicates the vortex light that topological charge is l and-l,
Vortex light topological charge takes arbitrary integer；To right-hand circular polarization ingredient without inverting action.
3. a kind of vector vortex photogenerated device based on gouy phase according to claim 1, which is characterized in that non-inclined
The transmission layer that shakes selects plano-convex cylindrical lenses or phase Fresnel piece (1).
4. a kind of vector vortex photogenerated device based on gouy phase according to claim 3, which is characterized in that plano-convex
Cylindrical lenses or phase Fresnel piece (1) can add the converging action that focal length is f, the work of polarization transmission layer (2) to incident light
With being to add the converging action that focal length is f to Left-hand circular polarization, the disperse function that focal length is-f is added to right-hand circular polarization；With
Focal length of lens composite formula when zero distance is placedThe combined total focal length that every side can be obtained is fL=f/2, fR
=+∞.
5. a kind of vector vortex photogenerated device based on gouy phase according to claim 4, which is characterized in that the device
Part can generate single mode vector vortex light, expression formula are as follows:
In formula, | L > expression Left-hand circular polarization, | R > expression right-hand circular polarization, γ are relative phase.
6. a kind of vector vortex photogenerated device based on gouy phase according to claim 4, which is characterized in that two
It is additionally provided between polarization transmission layer (2) articulamentum (5), and the length of articulamentum (5) is d=nf, n is connection layer material in formula
Refractive index.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910294248.6A CN110095881B (en) | 2019-04-12 | 2019-04-12 | Vector vortex optical rotation generating device based on Guyi phase |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910294248.6A CN110095881B (en) | 2019-04-12 | 2019-04-12 | Vector vortex optical rotation generating device based on Guyi phase |
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| CN110095881A true CN110095881A (en) | 2019-08-06 |
| CN110095881B CN110095881B (en) | 2020-08-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113448105A (en) * | 2021-04-29 | 2021-09-28 | 西安交通大学 | Linear constrained laser transverse high-order mode beam splitting unit and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101178484A (en) * | 2007-12-07 | 2008-05-14 | 南京大学 | Generation device of random polarization distributing vector light beam |
| CN103424861A (en) * | 2013-08-19 | 2013-12-04 | 北京信息科技大学 | Super-resolution confocal microimaging method and device based on column polarization vortex beam |
| CN105259666A (en) * | 2015-11-30 | 2016-01-20 | 南开大学 | Device for manufacturing microstructure through focal field trajectory based on dynamic control |
| CN107390381A (en) * | 2017-08-30 | 2017-11-24 | 济南大学 | A kind of method and apparatus that the rotation direction polarization vector light beam with vortex phase is produced based on axial cone mirror |
-
2019
- 2019-04-12 CN CN201910294248.6A patent/CN110095881B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101178484A (en) * | 2007-12-07 | 2008-05-14 | 南京大学 | Generation device of random polarization distributing vector light beam |
| CN103424861A (en) * | 2013-08-19 | 2013-12-04 | 北京信息科技大学 | Super-resolution confocal microimaging method and device based on column polarization vortex beam |
| CN105259666A (en) * | 2015-11-30 | 2016-01-20 | 南开大学 | Device for manufacturing microstructure through focal field trajectory based on dynamic control |
| CN107390381A (en) * | 2017-08-30 | 2017-11-24 | 济南大学 | A kind of method and apparatus that the rotation direction polarization vector light beam with vortex phase is produced based on axial cone mirror |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113448105A (en) * | 2021-04-29 | 2021-09-28 | 西安交通大学 | Linear constrained laser transverse high-order mode beam splitting unit and system |
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