CN106597578A - Crescent windmill superstructure surface - Google Patents
Crescent windmill superstructure surface Download PDFInfo
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- CN106597578A CN106597578A CN201611222888.9A CN201611222888A CN106597578A CN 106597578 A CN106597578 A CN 106597578A CN 201611222888 A CN201611222888 A CN 201611222888A CN 106597578 A CN106597578 A CN 106597578A
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- crescent
- windmill
- flabellum
- superstructure
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/002—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of materials engineered to provide properties not available in nature, e.g. metamaterials
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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
Abstract
Disclosed is a crescent windmill superstructure surface producing a local complex polarized light field. The substrate of the superstructure is an optical dielectric material. The superstructure surface is of a windmill nano metal structure, and is composed of multiple blades arranged at equal angles, wherein each blade is crescent. The windmill structure binds incident light energy to the superstructure surface, and produces a local strong field at the tip of each crescent blade finally. As the blades of the windmill are arranged at equal angles, incident linearly-polarized light can be converted into local complex polarization. The number of focus points, enhancement factor and local polarization state of a focus field can be regulated by changing the number of blades N and a crescent factor m. The crescent windmill superstructure surface can be used as a polarization converter or a particle manipulation waveguide, and has important application value in fields like light field polarization modulation and nano manipulation.
Description
Technical field
The invention belongs to optics and field of photoelectric technology, are related to light field Polarization Modulation, nano-manipulation, surface plasma and swash
Send out, particularly a kind of new windmill-shaped superstructure surface for producing local composite polarizing light field.
Background technology
Super surface is one-dimensional or the Artificial plasma array in two-dimensional sub-wavelength cycle.Thickness and operation due to super surface
Wavelength is compared minimum, and super surface can be considered the non-continuous face for making incident light amplitude and phase place undergo mutation, therefore super surface
It is generally used for light field regulation and control, such as：Phase place regulation and control, polarization regulation and control etc..Seldom consider simultaneously real in existing super study of surfaces in the world
The regulation and control of existing vectorial field local polarization and the regulation and control of strong-focusing light field.Windmill-shaped superstructure surface in research related to the present invention
Fan blade of windmill shape species has：L-shaped, rod, plane set-hammer shape, Qian font, these chiralitys of research to windmill-shaped superstructure surface
Material behavior concern is more, seldom the vectorial field regulation and control on the super surface of concern.In terms of strong-focusing light field regulation and control, in the world some
Research group proposes crescent nanostructured, and incident illumination energy is strapped in surface and is produced at crescent tip high by the structure
Intensity focuses on light field, and crescent nanostructured is not applied to windmill-shaped super surface.
The content of the invention
The present invention seeks to solve the problems, such as while realizing Local Vector distribution of light intensity and polarization regulation and control, there is provided a kind of new
Generation local composite polarizing light field the windmill-shaped superstructure surface of crescent.The present invention creatively by crescent nanostructured with
Windmill-shaped super surface combines, to realize the regulation and control of local vectorial field intensity and polarization simultaneously.
Technical solution of the present invention
The windmill-shaped superstructure surface of crescent of local composite polarizing light field can be produced, the superstructure is by substrate and windmill-shaped
Structure composite is constituted, and substrate is optical medium material, and superstructure surface is windmill-shaped nanometer metal structure, by N number of flabellum isogonism
Degree is arranged to make up, and each flabellum is crescent, and planar circumferential angle bisecting is N parts by N number of crescent structure flabellum.The crescent
The geometry of shape flabellum can be equivalent to two different cylinders of section radius and intercept and obtain, wherein the big cylinder section center of circle
In small cylinder section edges, crescent flabellum is intercepted by cylinder 2 by cylinder 1 and formed, the section radius of two cylinders
Meet relational expression
Wherein m is defined as the crescent factor, and m >=2 and m are positive integer, R1For the section radius of cylinder 1, R2For cylinder
2 section radius, section distance of center circle
Medium substrate is cube structure, and size of foundation base is S × S × H, and wherein S is the length of substrate and the horizontal stroke of width, i.e. substrate
Section is square, and H is the thickness of substrate.
The windmill-shaped superstructure surface of described crescent, can be bound to superstructure surface by incident illumination energy, and finally exist
Each crescent flabellum tip produces local high field；Due to the flabellum of windmill it is equiangularly arranged, while can be inclined by incident line
Light is converted into local composite polarizing.Change focusing points, the enhancer of flabellum number N and crescent factor m regulatable focusing field
And local polarization state.
Advantages of the present invention and good effect：
The windmill-shaped superstructure surface of crescent that the present invention is provided, can be bound to superstructure surface by incident illumination energy, and
It is final to produce local high field at each crescent flabellum tip；Due to the flabellum of windmill it is equiangularly arranged, while can be by incidence
Line polarisation be converted into local composite polarizing.Change focusing points, the increasing of flabellum number N and crescent factor m regulatable focusing field
The strong factor and local polarization state.Meanwhile, superstructure surface have be simple to manufacture, be advantageously integrated lumped component in body structure surface
Advantage.The present invention can be used as polarization converter, particle manipulation waveguide, have important to fields such as light field Polarization Modulation, nano-manipulations
Using value.
Description of the drawings
Fig. 1 is silica glass substrate and crescent windmill-shape metal structure is combined composition can produce light in metal flat
Polarization change, flabellum tip can produce focusing light field the windmill-shaped superstructure surface of four leaf crescents (with flabellum number N=4
As a example by).Wherein：A () is the front view on the windmill-shaped superstructure surface of crescent；B () is that the right side on the windmill-shaped superstructure surface of crescent regards
Figure；C () is the top view on the windmill-shaped superstructure surface of crescent；D () is the geometric representation of crescent blade structure.
When Fig. 2 is linear polarization visible light wave range Gaussian beam vertical incidence, the windmill-shaped superstructure surface metal plane of crescent
The direction (by taking flabellum number N=4, crescent factor m=2 as an example) of light field polarization.Wherein：A () is the windmill-shaped superstructure table of crescent
Face metal flat electric field polarization direction；B () is the windmill-shaped superstructure surface metal flat magnetic field polarization direction of crescent.
When Fig. 3 is linear polarization visible light wave range Gaussian beam vertical incidence, the windmill-shaped superstructure surface metal flabellum of crescent
The focusing distribution of light intensity distribution schematic diagram that tip produces.Wherein：Distribution of light intensity distribution schematic diagram is focused on when () is N=2, m=2 a；
Distribution of light intensity distribution schematic diagram is focused on when () is N=4, m=2 b；Focus on distribution of light intensity distribution when () is N=7, m=2 c to illustrate
Figure；Distribution of light intensity distribution schematic diagram is focused on when () is N=4, m=3 d.
Specific embodiment
Embodiment 1
As shown in figure 1, the windmill-shaped superstructure surface of crescent that the present invention is provided, the superstructure is by medium substrate and windmill-shape
Metal structure is compound to be constituted, and the flabellum of windmill-shaped metal structure is crescent structure, and flabellum number is N, and windmill-shaped structure is by crescent
Shape structure is angularly arranged to make up with direction of rotation, is N parts by planar circumferential angle bisecting.Medium substrate is cube structure,
Size of foundation base is S × S × H, and wherein S is the length and width of substrate, and H is the thickness of substrate.The geometry of crescent flabellum can be waited
Imitate and intercept in two cylinders and obtain, the section radius of the cylinder 1 and cylinder 2 that intercept crescent shape meet relational expression
Wherein m is defined as the crescent factor, and m >=2 and m are positive integer, R1For the section radius of cylinder 1, R2For cylinder
2 section radius, section distance of center circle
The making on the windmill-shaped superstructure surface of crescent in the present invention can be adopted to target magnetically controlled DC sputtering and focused ion
Beam lithographic technique is realizing.It is comprised the following steps that：
(1) using to sputtering in the glass substrates such as quartz or in the Semiconductor substrate such as silicon to target DC magnetron sputtering method
Gold, silver, aluminum, copper etc. receive metal film；
(2) etch on metal film metal crescent windmill receiving using focused-ion-beam lithography technology or direct electronic beam writing technology
Type structure.
Concrete application example 1
The design parameter on the windmill-shaped superstructure surface of crescent is as follows：
Media substrate materials are silica glass, and the windmill-shaped metal material of crescent is silver-colored, incident wavelength λ=600nm, this
When ag material refractive index nAg=0.04741+4.0419i, silica glass refractive index ng=1.5163+1.0566 × 10-8i。
Size of foundation base be 300nm × 300nm × 80nm, fan blade of windmill number be N=4, windmill-shaped metal by four be angularly distributed it is new
The moon, shape metal was constituted, and crescent form of metal can be equivalent to cylinder 1 and be intercepted and obtained, crescent factor m=2, material by cylinder 2
Material chooses R1=50nm, then R2≈ 71nm, section distance of center circle d=50nm.Incident illumination be linear polarization Gaussian beam, its electric field polarization
Direction is identical with x-axis positive direction in Fig. 1 (c), and magnetic field polarization direction is identical with y-axis positive direction in Fig. 1 (c).
When Fig. 2 is linear polarization visible light wave range Gaussian beam vertical incidence, crescent windmill-shape superstructure surface metal plane
The direction (by taking flabellum number N=4, crescent factor m=2 as an example) of light field polarization.Wherein：A () is the windmill-shaped superstructure table of crescent
Face metal flat electric field polarization direction, its polarization direction is radial direction of polarisation；B () is the windmill-shaped superstructure surface metal of crescent
Flat magnetic field polarization direction, its polarization direction is vertical with electric field polarization direction, is angular polarization direction.
When Fig. 3 is linear polarization visible light wave range Gaussian beam vertical incidence, the windmill-shaped superstructure surface metal flabellum of crescent
The focusing distribution of light intensity distribution schematic diagram that tip produces.Wherein：Focus on distribution of light intensity distribution when () is flabellum number N=2 a to illustrate
Figure；Distribution of light intensity distribution schematic diagram is focused on when () is flabellum number N=4 b；Distribution of light intensity distribution is focused on when () is flabellum number N=7 c
Schematic diagram；Distribution of light intensity distribution schematic diagram is focused on when () is N=4, m=3 d.Windmill-shaped metal structure central absorbent Light Energy,
And produce high intensity local focousing field at windmill-shaped each crescent flabellum tip.When flabellum number N changes, focousing field focus point
Number and enhancer can change；When crescent factor m changes, because m increases crescent metal inner curve can be caused bent
Rate increases, and so as to cause thickness to increase, and then enhancer can increase with m and reduce.Therefore, flabellum number N and crescent is changed
The focusing points of factor m regulatable focusing field, enhancer and local polarization state.
In the surface phasmon that windmill-shaped metal structure surface is excited, propagate to top along crescent blade surface,
Nano-focusing light field is formed on top.The described windmill-shaped superstructure surface of four leaf crescents, windmill-shaped superstructure is by incident optical energy
Amount is bound to superstructure surface, and final in each crescent flabellum tip generation local high field；Due to the flabellum isogonism of windmill
Degree arrangement, while incident line polarisation can be converted into into local composite polarizing.Change flabellum number N and crescent factor m is adjustable
Control focusing points, enhancer and the local polarization state of focousing field.The present invention can be used as polarization converter, particle manipulation ripple
Lead, have important using value to fields such as light field Polarization Modulation, nano-manipulations.
Claims (3)
1. it is a kind of produce local composite polarizing light field the windmill-shaped superstructure surface of crescent, it is characterised in that the substrate of the superstructure
For optical medium material, superstructure surface is windmill-shaped nanometer metal structure, is constituted by N number of flabellum is equiangularly arranged, each fan
Leaf is crescent, and planar circumferential angle bisecting is N parts by N number of crescent structure flabellum；The geometry of the crescent flabellum
Two different cylinders of section radius can be equivalent to intercept and obtain.
2. the windmill-shaped superstructure surface of crescent according to claim 1, it is characterised in that medium substrate is cube structure,
Size of foundation base is S × S × H, and wherein S is the length and width of substrate, and H is the thickness of substrate；Crescent flabellum is by cylinder 1 by cylinder
Body 2 is intercepted and formed, and the section radius of two cylinders meet relational expression
Wherein m is defined as the crescent factor, and m >=2 and m are positive integer, R1For the section radius of cylinder 1, R2For cylinder 2
Section radius, section distance of center circle is
3. the windmill-shaped superstructure surface of crescent according to claim 1 and 2, it is characterised in that windmill-shaped superstructure is by incidence
Light energy is bound to superstructure surface, and final in each crescent flabellum tip generation local high field；Due to the flabellum of windmill
It is equiangularly arranged, while incident line polarisation can be converted into into local composite polarizing；Change flabellum number N and crescent factor m
Focusing points, enhancer and the local polarization state of focousing field can be regulated and controled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611222888.9A CN106597578B (en) | 2016-12-27 | 2016-12-27 | The windmill-shaped superstructure surface of crescent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611222888.9A CN106597578B (en) | 2016-12-27 | 2016-12-27 | The windmill-shaped superstructure surface of crescent |
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| CN106597578A true CN106597578A (en) | 2017-04-26 |
| CN106597578B CN106597578B (en) | 2018-10-26 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106990547A (en) * | 2017-05-16 | 2017-07-28 | 南开大学 | The super surface of dolphin shape cellular circular array |
| CN107290826A (en) * | 2017-07-26 | 2017-10-24 | 江苏大学 | A kind of Two dimensional square lattice photon crystal structure with big TM forbidden bands based on windmill-shaped defect |
| CN108363129A (en) * | 2018-04-20 | 2018-08-03 | 南开大学 | More structure combinatorial artificial resistance electromagnetic surfaces |
| CN110261951A (en) * | 2019-07-04 | 2019-09-20 | 南开大学 | High performance surface enhances the circular polarization dichroics and method of chiral optic response |
| CN110568624A (en) * | 2019-08-15 | 2019-12-13 | 复旦大学 | Polarization conversion device based on angular dispersion principle |
| CN112928418A (en) * | 2021-03-12 | 2021-06-08 | 南通大学 | Fan-shaped loaded sub-terahertz dielectric waveguide |
| CN113885118A (en) * | 2021-11-01 | 2022-01-04 | 觉芯电子(无锡)有限公司 | Chiral optical element and preparation method thereof |
| CN114779373A (en) * | 2022-03-14 | 2022-07-22 | 清华大学 | Optical power beam splitter and preparation method thereof |
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| CN105044814A (en) * | 2015-08-03 | 2015-11-11 | 欧阳征标 | Right-hand circularly-polarized conversion meta-material film |
| CN105866981A (en) * | 2016-04-20 | 2016-08-17 | 中国科学院光电技术研究所 | Broadband electromagnetic wave phase modulating method and super-surface sub-wavelength structure |
| CN106200012A (en) * | 2016-07-14 | 2016-12-07 | 浙江工业大学 | A kind of chirality superstructure using metal silicide |
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| CN103954363A (en) * | 2014-04-24 | 2014-07-30 | 浙江工业大学 | Circular polarized light detector and manufacturing method thereof |
| CN104965243A (en) * | 2015-06-16 | 2015-10-07 | 南京大学 | Slab lens for realizing plane wave focusing by adopting metastructure surface |
| CN105044814A (en) * | 2015-08-03 | 2015-11-11 | 欧阳征标 | Right-hand circularly-polarized conversion meta-material film |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106990547A (en) * | 2017-05-16 | 2017-07-28 | 南开大学 | The super surface of dolphin shape cellular circular array |
| CN106990547B (en) * | 2017-05-16 | 2021-08-13 | 南开大学 | Dolphin-shaped cellular circle array super surface |
| CN107290826A (en) * | 2017-07-26 | 2017-10-24 | 江苏大学 | A kind of Two dimensional square lattice photon crystal structure with big TM forbidden bands based on windmill-shaped defect |
| CN107290826B (en) * | 2017-07-26 | 2019-12-03 | 江苏大学 | A kind of Two dimensional square lattice photon crystal structure with big TM forbidden band based on windmill-shaped defect |
| CN108363129A (en) * | 2018-04-20 | 2018-08-03 | 南开大学 | More structure combinatorial artificial resistance electromagnetic surfaces |
| CN110261951A (en) * | 2019-07-04 | 2019-09-20 | 南开大学 | High performance surface enhances the circular polarization dichroics and method of chiral optic response |
| CN110568624A (en) * | 2019-08-15 | 2019-12-13 | 复旦大学 | Polarization conversion device based on angular dispersion principle |
| CN110568624B (en) * | 2019-08-15 | 2021-06-04 | 复旦大学 | Polarization conversion device based on angular dispersion principle |
| CN112928418A (en) * | 2021-03-12 | 2021-06-08 | 南通大学 | Fan-shaped loaded sub-terahertz dielectric waveguide |
| CN113885118A (en) * | 2021-11-01 | 2022-01-04 | 觉芯电子(无锡)有限公司 | Chiral optical element and preparation method thereof |
| CN114779373A (en) * | 2022-03-14 | 2022-07-22 | 清华大学 | Optical power beam splitter and preparation method thereof |
| CN114779373B (en) * | 2022-03-14 | 2024-03-26 | 清华大学 | Optical power beam splitter and method for manufacturing the same |
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| CN106597578B (en) | 2018-10-26 |
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