CN108107498A - A kind of non-linear phase gradient based on rotation crystal orientation surpasses surface - Google Patents
A kind of non-linear phase gradient based on rotation crystal orientation surpasses surface Download PDFInfo
- Publication number
- CN108107498A CN108107498A CN201711346465.2A CN201711346465A CN108107498A CN 108107498 A CN108107498 A CN 108107498A CN 201711346465 A CN201711346465 A CN 201711346465A CN 108107498 A CN108107498 A CN 108107498A
- Authority
- CN
- China
- Prior art keywords
- phase gradient
- phase
- linear
- crystal orientation
- slit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3083—Birefringent or phase retarding elements
-
- 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
- G02F1/35—Non-linear optics
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Polarising Elements (AREA)
Abstract
The present invention provides a kind of non-linear phase gradients based on rotation crystal orientation to surpass surface, including with triple (C3), five weight (C5) etc. high-orders rotational symmetry sub-wavelength metallic hole or slit.The present invention breaks the selection rule of conventional geometric position mutually super surface cell structure, by design triangle shape, Y-shaped, pentagon etc. there is the sub-wavelength metallic hole of rotating multi symmetry or slit to obtain unusual nonlinear geometry phase gradient in linear optical system.This phase gradient is different from traditional nonlinear phase, and traditional nonlinear phase is often referred to the phase entrained by high-order harmonic wave (n >=2), and the phase gradient generated here derives from fundamental wave (n=1).The present invention realizes non-linear phase gradient in linear super surface, has overturned cognition of the people to geometric phase in linearly super surface, and the principle and application to Spatial transmission in linear optical system are of great significance.
Description
Technical field
The present invention relates to electromagnetic wave phases to regulate and control field, is to be related to one kind to generate in linear optical material specifically
Nonlinear geometry phase gradient surpass surface.
Background technology
In linear optical system, incident circularly polarized light interacts with anisotropic super structure functional motif, transmission
Or there is the circularly polarized light opposite with incident light chirality in reflected light, and carry related with super structure functional motif rotation angle
Geometric phase, i.e. Pancharatnam-Berry geometric phases.The major advantage of P-B geometric phases is it independent of structure
Size, optical resonance and intrinsic material dispersion, therefore its phase regulation and control field in place has received widespread attention and studies.It is logical
Often, the super surface based on P-B phases selects the sub-wavelength structures such as rectangular opening/column, elliptical aperture/column to pass through rotation as super structure unit
Turn these functional units to generate the phase difference of the σ θ of Φ=2.Here, θ is the azimuth of super structure unit, and σ=± 1 represents left respectively
Rotation or right-hand circular polarization.
The geometric phase being analogous in linear optical system, someone introduce nonlinear optics geometry phase on super structure surface
Position, and prove that it can continuously control the phase of effective non-linear susceptibility.For identical with fundamental wave circular polarization state rotation direction or
Opposite non-linear harmonic wave radiation, the corresponding geometric phase of n-th non-linear harmonic wave are (n+1) i σ θ or (n+1) i σ θ.It is non-linear
The one very big advantage of harmonic wave geometric phase is exactly, and has the super structure primitive of m fold rotational symmetry, and as m >=3, it is in linear light
There is isotropism response in.Therefore, adjusting the azimuth of super structure primitive and then controlling the non-linear of some harmonic numbers
During phase, the linear optics response homogeneity of fundamental wave is not interfered with.
It is obvious that above-mentioned nonlinear optics geometric phase is for the high-order harmonic wave generated, and for linear
Optical system is there is no nonlinear phase gradient, this has limited to several significantly in the cognition of people that is, for fundamental wave
Development of the He Weixiang in linear optical system.
The content of the invention
The present invention proposes one kind in linear optical system, and the non-linear phase gradient based on rotation crystal orientation surpasses surface,
There is the sub-wavelength metallic hole or slit of rotating multi symmetry by design triangle shape, Y-shaped, pentagon etc. so that linear
Fundamental wave in super surface carries nonlinear geometric phase.
The technical solution adopted by the present invention to solve the technical problems is：A kind of non-linear position based on rotation crystal orientation is mutually terraced
The super surface of degree has triple (C including one layer3), five weight (C5) etc. high-orders rotational symmetry sub-wavelength metallic hole or slit, energy
It is enough to surpass acquisition nonlinear geometry phase gradient in surface in linear optics.
Wherein, the thickness of the metal aperture or slit is h, value range h<λ0/ 4, λ0Centered on wavelength.
Wherein, the value range of the metal aperture or the period p of slit is p<λ0/ 2, λ0Centered on wavelength.
Wherein, the metal layer material can be gold, aluminium etc..
Wherein, the transmission cross polarization ingredient on the super surface and reflection cross polarization ingredient are respectively provided with this phase gradient.
Wherein, the rotational symmetries of the sub-wavelength metallic hole or slit with triple, five weights or higher odd number exponent number are
Can, it is not limited to the forms such as equilateral triangle, regular pentagon.
Wherein, the super surface phase gradient has universality, is not only suitable for visible light wave range, is also applied for infrared waves
Section.
The device have the advantages that it is：
The present invention breaks the selection rule of conventional geometric position mutually super surface cell structure, by design triangle shape, Y-shaped,
Pentagon etc. have rotating multi symmetry sub-wavelength metallic hole or slit linear optics surpass obtained in surface it is non-linear
Geometry texture gradient.This phase gradient is different from traditional nonlinear phase, and it is humorous that traditional nonlinear phase is often referred to high-order
Phase entrained by ripple (n >=2), and the phase gradient generated here derives from fundamental wave (n=1).The present invention is on linear super surface
In realize nonlinear phase gradient, cognition of the people to geometric phase in linearly super surface has been overturned, to linear optics system
The principle of Spatial transmission and application are of great significance in system.
Description of the drawings
Fig. 1 is several cellular construction schematic diagrams of the present invention；
Fig. 2 is simulation result of the postrotational phase difference of cellular construction with wavelength change；
Fig. 3 is the far field construction pattern that CCD is recorded under different distance in experiment, and wherein Fig. 3 (a) is under Z=0 μm of distance
The far field construction pattern of CCD records, Fig. 3 (b) are the Z=20 μm of far field construction pattern apart from lower CCD records, and Fig. 3 (c) is Z=
40 μm of far field construction patterns apart from lower CCD records；
Fig. 4 is distribution situation of the diffracted intensity in xz planes of record.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in detail, but protection scope of the present invention is not
Example below is only limitted to, the full content in claims should be included.And those skilled in the art are from following one
The full content in claim can be realized in embodiment.
The specific implementation process is as follows：
As shown in Figure 1, the phase gradient, which surpasses surface, includes one layer of sub-wavelength metallic hole or slit, the thickness of hole or slit is
H, cycle p.
With reference to said structure, illustrate that the present invention realizes the principle of phase-modulation first, it is as follows：
In linear optical system, people think always, and rotatory polarization only incides into anisotropic super structure functional motif
On, a kind of geometric phase can just be carried with the chiral opposite circularly polarized light of incident light by having in transmission or reflection light.This phase
It is only related with the rotation angle of super structure primitive, it is known as Pancharatnam-Berry geometric phases, the θ of Φ=± 2 can be expressed as.
And in fact, rotatory polarization incide into macroscopically in isotropism but with odd-order rotational symmetry super structure unit on, transmission
Or the ingredient of generation polarization conversion still carries geometric phase in reflected light.This phase can be expressed as Φ=± 2m θ,
Middle m is the exponent number of cellular construction rotational symmetry.It can be found that situation when P-B phases are just for m=1.And for being carried
The C such as the triangle, Y-shaped hole or the slit that arrive3Structure will generate the phase gradient of the θ of Φ=± 6, for C such as pentagon holes5Knot
Structure will generate the phase gradient of the θ of Φ=± 10.
In order to be better understood from the present invention, it is further expalined with reference to embodiment 1.
Embodiment 1
Without loss of generality, selection has triple rotational symmetry (C here3) equilateral triangle hole exemplified by illustrate,
Metal layer material selected as gold, dielectric constant are obtained from Palik optics handbooks.The structure is emulated using CST software
Optimization, emulation wave band are 600-750nm, and the cellular construction parameter after optimization is p=300nm, h=120nm, triangle length of side d
=150nm.
It is as shown in Figure 2 by the phase difference caused by rotary unit structure.It can see that, in entire 600-750nm ripples
Section, cellular construction often rotates 10 °, generates 60 ° relatively stable of phase difference, meets the relation of the θ of Φ=± 6.
Next, a full mould with light beam deviation effect is devised come this phase gradient of testing.It will rotation
Cellular construction arrange along the x-axis direction, the plane wave of a branch of Left-hand circular polarization is incided into below structure on super surface, transmitted light
In dextrorotation ingredient deviation will occur, deflection angle isHere, λ represents incident wavelength, and P represents super surface
Cycle meets P=np, and wherein p is the cycle of cellular construction, and n represents the exponent number of phase gradient.It is really obtained by imitating entirely in λ
Deviation angle at=632.8nm is 20.5 °, consistent with theoretical formula method result.
In order to experimentally observe this deflection phenomenon and then confirm this phase gradient, sample is machined using FIB
And it is tested.By the 632.8nm circularly polarized lasers of a branch of collimation along the z-axis direction perpendicular through sample, recorded not using CCD
The far field construction pattern of transmitted light under same distance.Fig. 3 show Z=0, Z=20 μm, Z=40 μm when record as a result, can see
See apparent pattern movement.In order to more accurately characterize the deviation effect of light beam, the diffraction pattern of x/y plane is had recorded every 1 μm
Sample finally intercepts the mapping of xz sections, as shown in Figure 4.It can see that, deviation occurs in diffraction pattern, and the deflection angle measured approaches
It is consistent with theoretical and simulation result for 20.5 °.
Therefore, the embodiment of the present invention is described above in conjunction with attached drawing, but the invention is not limited in above-mentioned
Specific embodiment, above-mentioned embodiment is only schematical rather than restricted.The present invention does not elaborate portion
Belong to the known technology of those skilled in the art.
Claims (7)
1. a kind of non-linear phase gradient based on rotation crystal orientation surpasses surface, it is characterised in that：There are triple (C including one layer3)、
Five weight (C5) etc. high-orders rotational symmetry sub-wavelength metallic hole or slit, can linear optics surpass obtained in surface it is non-linear
Geometry texture gradient.
2. a kind of non-linear phase gradient based on rotation crystal orientation according to claim 1 surpasses surface, it is characterised in that：Institute
The thickness for stating metal aperture or slit is h, value range h<λ0/ 4, λ0Centered on wavelength.
3. a kind of non-linear phase gradient based on rotation crystal orientation according to claim 1 surpasses surface, it is characterised in that：Institute
The value range for stating metal aperture or the period p of slit is p<λ0/ 2, λ0Centered on wavelength.
4. a kind of non-linear phase gradient based on rotation crystal orientation according to claim 1 surpasses surface, it is characterised in that：Institute
It can be gold, aluminium etc. to state metal layer material.
5. a kind of non-linear phase gradient based on rotation crystal orientation according to claim 1 surpasses surface, it is characterised in that：Institute
The transmission cross polarization ingredient and reflection cross polarization ingredient for stating super surface are respectively provided with this phase gradient.
6. a kind of non-linear phase gradient based on rotation crystal orientation according to claim 1 surpasses surface, it is characterised in that：Institute
Stating sub-wavelength metallic hole or slit has the rotational symmetry of triple, five weights or higher odd number exponent number, is not limited to positive three
The forms such as angular, regular pentagon.
7. a kind of non-linear phase gradient based on rotation crystal orientation according to claim 1 surpasses surface, it is characterised in that：Institute
Super surface phase gradient is stated with universality, visible light wave range is not only suitable for, is also applied for infrared band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711346465.2A CN108107498B (en) | 2017-12-15 | 2017-12-15 | Nonlinear phase gradient super surface based on rotating crystal orientation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711346465.2A CN108107498B (en) | 2017-12-15 | 2017-12-15 | Nonlinear phase gradient super surface based on rotating crystal orientation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108107498A true CN108107498A (en) | 2018-06-01 |
| CN108107498B CN108107498B (en) | 2019-12-31 |
Family
ID=62217140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711346465.2A Active CN108107498B (en) | 2017-12-15 | 2017-12-15 | Nonlinear phase gradient super surface based on rotating crystal orientation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108107498B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113946009A (en) * | 2021-10-27 | 2022-01-18 | 中国科学院光电技术研究所 | Super-structure surface device and design and preparation method thereof |
| CN114112927A (en) * | 2021-10-22 | 2022-03-01 | 深圳大学 | OAM mode switcher |
| CN114719774A (en) * | 2022-04-01 | 2022-07-08 | 浙江大学 | Superstructure dispersion confocal-based complex curved surface morphology measurement method and system |
| CN114762191A (en) * | 2022-03-07 | 2022-07-15 | 中国科学院光电技术研究所 | Nonlinear geometric phase super surface based on high-order rotational symmetry unit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569622A (en) * | 2014-12-24 | 2015-04-29 | 复旦大学 | Efficient microwave polarization detection device based on photonic spin Hall effect |
| CN105552556A (en) * | 2015-12-28 | 2016-05-04 | 西安电子科技大学 | Orbital angular momentum vortex wave beam generation apparatus and method |
-
2017
- 2017-12-15 CN CN201711346465.2A patent/CN108107498B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569622A (en) * | 2014-12-24 | 2015-04-29 | 复旦大学 | Efficient microwave polarization detection device based on photonic spin Hall effect |
| CN105552556A (en) * | 2015-12-28 | 2016-05-04 | 西安电子科技大学 | Orbital angular momentum vortex wave beam generation apparatus and method |
Non-Patent Citations (2)
| Title |
|---|
| GUIXIN LI .ETAL: "Nonlinear Metasurface for Simultaneous Control of Spin and Orbital Angular Momentum in Second Harmonic Generation", 《NANO LETTERS》 * |
| GUIXIN LI ETAL: "Nonlinear photonic metasurfaces", 《NATURE REVIEWS》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112927A (en) * | 2021-10-22 | 2022-03-01 | 深圳大学 | OAM mode switcher |
| CN114112927B (en) * | 2021-10-22 | 2023-11-14 | 深圳大学 | OAM mode switcher |
| CN113946009A (en) * | 2021-10-27 | 2022-01-18 | 中国科学院光电技术研究所 | Super-structure surface device and design and preparation method thereof |
| CN113946009B (en) * | 2021-10-27 | 2023-10-03 | 中国科学院光电技术研究所 | Super-structured surface device and design and preparation method thereof |
| CN114762191A (en) * | 2022-03-07 | 2022-07-15 | 中国科学院光电技术研究所 | Nonlinear geometric phase super surface based on high-order rotational symmetry unit |
| WO2023168555A1 (en) * | 2022-03-07 | 2023-09-14 | 中国科学院光电技术研究所 | High-order rotational symmetry unit-based nonlinear geometric phase metasurface |
| CN114719774A (en) * | 2022-04-01 | 2022-07-08 | 浙江大学 | Superstructure dispersion confocal-based complex curved surface morphology measurement method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108107498B (en) | 2019-12-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108107498A (en) | A kind of non-linear phase gradient based on rotation crystal orientation surpasses surface | |
| Xie et al. | Generalized Pancharatnam-Berry phase in rotationally symmetric meta-atoms | |
| Lv et al. | Metasurface cylindrical vector light generators based on nanometer holes | |
| Wang et al. | Polarization singularities: Progress, fundamental physics, and prospects | |
| CN105807598B (en) | Silicon nano brick array structure and its design method applied to Fourier's color hologram | |
| CN109270606A (en) | A method of dynamic multifocal super lens are constructed based on medium and graphene | |
| Guo et al. | Tying polarization‐switchable optical vortex knots and links via holographic all‐dielectric metasurfaces | |
| Qi et al. | Efficient manipulation of terahertz waves by multi-bit coding metasurfaces and further applications of such metasurfaces | |
| WO2012122823A1 (en) | Metamaterial polarization converter | |
| CN109212741A (en) | A kind of continuous magnification lens and optical system | |
| Galvez et al. | Composite optical vortices formed by collinear Laguerre-Gauss beams | |
| Wang et al. | Diatomic metasurface based broadband J-plate for arbitrary spin-to-orbital conversion | |
| Li et al. | Tailoring Circular Dichroism in an Isomeric Manner: Complete Control of Amplitude and Phase for High‐Quality Hologram and Beam Forming | |
| Lv et al. | Metasurface circular polarizer based on rotational symmetric nanoholes | |
| Kang et al. | Spatial splitting of spin states in subwavelength metallic microstructures via partial conversion of spin-to-orbital angular momentum | |
| Gong et al. | Measuring orbital angular momentum of acoustic vortices based on Fraunhofer’s diffraction | |
| Zhu et al. | Full space control of meta-holograms utilizing a bilayered patterned coding metasurface | |
| Wu et al. | Near-infrared chirality of plasmonic metasurfaces with gold rectangular holes | |
| Yang et al. | Multiparameter controllable chiral optical patterns | |
| Wang et al. | Creation of an arbitrary electromagnetic illusion using a planar ultrathin metasurface | |
| Meng et al. | Spoof surface plasmon polaritons excitation and wavefront control by Pancharatnam–Berry phase manipulating metasurface | |
| CN109709630A (en) | Surpass the sub-wavelength vortex beams array production method on surface based on metal nano | |
| CN108983443A (en) | Metasurface for generating diffraction-free optical vortex lattice and design method thereof | |
| Krasavin et al. | Extraordinary properties of light transmission through a small chiral hole in a metallic screen | |
| Kumar et al. | The Pancharatnam–Berry phase in polarization singular beams |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |