CN106681026A - Arbitrary polarization dynamic control device and method based on metamaterial-surface-phase-change-material - Google Patents
Arbitrary polarization dynamic control device and method based on metamaterial-surface-phase-change-material Download PDFInfo
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- 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
- G02F1/0136—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 for the control of polarisation, e.g. state of polarisation [SOP] control, polarisation scrambling, TE-TM mode conversion or separation
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Abstract
The invention relates to an arbitrary polarization dynamic control device and method based on metamaterial surface-phase change material, and belongs to the technical field of micro-nano optical applications. A metamaterial surface based on a V type nano-antenna array is used for reacting with a light field to generate a surface phase gradient, which causes that the abnormally transmitted polarized light generated under the condition of line polarized light normal incidence, deflects from the normal direction of the surface. At the same time, with the introduction of an interval modulation layer comprising periodically arrayed germanium-antimony-tellurium, under external excitation, phase differences of orthogonal polarization state emitted by different units are modulated, and overlap in space to achieve random polarization state synthesis of an outgoing light field. The method is an all-solid-state modulation method with no necessity of any mechanical modulation measures such as drawing or rotating. The separation of random polarized light and background light beams can be achieved to avoid cross fire. The method provides a flexible regulation and control measure for on-chip polarization applications of integrated optics.
Description
Technical field
The present invention relates to a kind of random polarization dynamic regulation device based on super clever surface-phase-change material and method, belong to
Micronano optical applied technical field.
Background technology
Polarization state is the base attribute of electromagnetic wave.The polarization state of electromagnetic wave is controlled, any conversion of different polarization states is realized
In optoelectronic communication, bio-sensing, accurate measurement, the field such as remote sensing all has a wide range of applications.Traditional Polarization Modulation means
Anisotropic material is depended on, for example the birefringence mineral crystal such as quartz, calcite, by rotating crystal optical axis and incidence
The angle of polarization state, to control the phase difference between ordinary light and non-ordinary light to realize the regulation and control of polarization state.Conventional geometric optics
Method has been no longer desirable for the fields such as the integrated optics risen in recent years and planar wave, and in device miniaturization, miniaturization is integrated
Etc. aspect encounter difficulty.
The miniaturization of traditional optical component is solved, an integrated difficult feasible way is using super clever surface.It is super clever
Surface is made up of the sub-wavelength size metallic or media units two-dimensional array of sophisticated design, and its thickness is much smaller than wavelength.Pass through
Structure design, super clever surface can planar pointwise change single pixel scattered field, to corresponding scattered amplitude, phase or
Polarization state is controlled, and finally realizes any regulation and control to whole transmitted field.The regulation and control to polarization state are realized using super clever surface
Attract extensive research interest, by sophisticated design individual layer or the structure of multi-layered anisotropic metamaterial unit, can be with
The regulation and control scheme of various polarization states is obtained, for example：Using complementary apertures type structure can manufacture terahertz wave band ultrathin type four/
One wave plate Opt.Express.23,11114 (2015)；Can realize that broadband is inclined in microwave band using the super clever surface texture of bilayer
Shake and change J.Appl.Phys.117,44501 (2015)；Three layers of parameter of anisotropic structure of careful design, it is possible to achieve specify
Polarization conversion Phys.Rev.Applied.2,044011 (2014).But the super clever surface polarization converter device reported its
Optical characteristics is difficult to dynamic regulation, i.e., its optical characteristics is completely fixed after device manufacture is finished, and can be only done a certain
Polarization adjusting function is specified, which has limited its application scenario.
The adjustable super grain husk of dynamic can be realized with reference to phase-change material and using modulator approaches such as suitable calorifics, optics, electricity
Surface.Used as a class phase transformation material, Ge-Sb-Te (germanium antimony tellurium, GeSbTe, GST) is nearest
Widely paid close attention in research.Wherein Ge3Sb2Te6(GST-326, GST) is widely used in middle-infrared band, for example with
GST realizes adjustable nano-antenna resonance Nano Lett.13,3470 (2013)；Dynamic tunable chiral material is realized using GST thin layers
Material Nano Lett.15,4255 (2015).Can realize that stabilization can repeated dynamic adjustable device using phase-change material GST.
But mainly it is adjusted using uniform GST thin layers in current document, and the adjustable polarization converter of dynamic is realized using GST
Part is not yet paid attention to.
The content of the invention
The invention aims to solve the problems, such as that current super clever surface polarizer is difficult to dynamic polarization regulation and control,
A kind of random polarization dynamic regulation device and method based on super clever surface-phase-change material are provided.
The present invention is achieved through the following technical solutions.
Based on the random polarization dynamic regulation device of super clever surface-phase-change material, the device composite construction is by V-type nanometer day
Line layer, interval modulation layer and basalis are constituted.V-type nano-antenna each periodic unit of layer includes two parts subelement, and son is single
Unit is made up of the V-type nanotube antenna array with different arrangement modes, and two parts subelement generates polarization direction mutually just respectively
The linear polarization scattering light of friendship.The V-type nanotube antenna array has certain surface phase gradient so that score polarization scattering light
The direction of propagation deviate incident direction, that is, surface normal direction is no longer normal to, to reduce the cross-talk of bias light.Adjust at interval
Preparative layer constitutes one-dimensional grating by the silicon and GST of periodic arrangement, and they are respectively placed in two between subelement and substrate, are used to adjust
Scattering phase difference between two subelements of section.Spacing distance between two subelements is much smaller than wavelength, it is believed that its scattering
Just spatial coherence, and any adjustable polarization state output is obtained space is overlapped.
Based on the random polarization dynamic regulation method of super clever surface-phase-change material, the light beam for being incident to device surface is included
The laser and femtosecond laser that will be adjusted, femtosecond laser are used to realize carry out dynamic regulation to super clever surface device.Modulated
Laser is irradiated on device surface with femtosecond laser after closing beam.Emergent light includes two parts：A part of direction of propagation is along device
Part surface normal, is bias light；Deviate device surface normal, the elliptic polarization comprising gained random polarization in another part direction of propagation
Light, object penetrating light.The energy of femtosecond laser adjusts to realize the tune to GST Refractive Index of Material in device by pulse selector
Control, and then realize the regulation and control to outgoing object penetrating polarization state.
The device of the random polarization dynamic regulation method based on super clever surface-phase-change material is realized, including：Laser, rise
Inclined device, the first speculum, femto-second laser, attenuator, pulse selector, a 4f telescopic systems lens, the 2nd 4f look in the distance and are
System lens, beam cementing prism, device surface, bias light, the second speculum, analyzer and power meter.
Annexation：Laser emitting obtains linearly polarized light by modulation laser by the polarizer, is reflected through the first speculum
To beam cementing prism；Femto-second laser outgoing femtosecond pulse is saturating with pulse selector and a 4f telescopic systems through attenuator
Beam cementing prism is incident to after mirror and the 2nd 4f telescopic system lens；It is incident to after modulation laser and femtosecond pulse ECDC beam
Device surface can obtain two beam emergent lights, and bias light is propagated along sample surfaces normal, the object penetrating light of polarization state needed for carrying
Device surface normal is deviateed in the direction of propagation, by reaching power meter after the second speculum and analyzer.
Completing the above-mentioned random polarization dynamic regulation device design based on super clever surface-phase-change material needs to separately design V
Type nanotube antenna array and interval modulation layer, each several part method for designing are as follows respectively：
(1) V-type nanotube antenna array
V-type nano-antenna can form two kinds of eigen modes with the resonance of light field：Symmetric pattern and antisymmetric mode.If entering
Ray polarizes light polarization direction parallel to its symmetry axis, now only excites its symmetric pattern；If incident light polarization direction perpendicular to
Its symmetry axis, now then only has antisymmetric mode and is excited.Generally, if any direction linearly polarized light vertical incidence is to sample
Product surface, then have：
Wherein α and β are respectively the angles of incident ray polarized light polarization direction, antenna symmetry axle and y-axis,WithRepresent respectively
The parallel unit vector with vertical antenna symmetry axis, SiAnd AiI-th antenna symmetry pattern and antisymmetry in subelement are represented respectively
The scattering complex amplitude of pattern.The scattered field of the antenna can further be write as：
Wherein x and y are respectively the unit vector along x-axis and y-axis.
As can be seen that scattered wave can be broken down into symmetric pattern and is superimposed with the complex amplitude of antisymmetric mode from formula (2),
That is (Si+Ai) and (Si-Ai) component.Their polarization direction is respectively α and 2 β-α with y-axis angle.By accurate selection day knot
Structure parameter, it is possible to achieve | Si-Ai| substantially constant, and (Si+1-Ai+1) and (Si-Ai) phase difference be 2 π/N, N be one
The number of antenna in subelement；And | Si+Ai| amplitude, and (Si+1+Ai+1) and (Si+Ai) phase is substantially constant.So
The scattered wave of 2 β-α polarized components in the case of normal incidence can be allowd along abnormal refraction angle θt=arcsin (λ/D) is propagated,
λ is incident wavelength in formula, and D is the length in subelement x directions；And along the scattering optical propagation direction of α polarizations perpendicular to sample surfaces.
Meanwhile, two subelements in each periodic unit possess identical structural parameters, but exist in x directions
Offset d, as shown in Figure 1.Therefore, two subelements can be produced along θtThe anomalous scattering that=arcsin (λ/D) direction is propagated
Light, and due to subelement in the y-direction spaced far much smaller than wavelength, it can thus be assumed that its scattering light spatial coherence.Additionally, two
Subelement antenna towards angle beta1And β2Meet β2-β1=45 °, i.e. (2 β2-α)-(2β1- α)=90 ° with cause two scatter light polarizations
Direction is mutually perpendicular to.Also, offset d in the x-direction can control by subelement produce two beam anomalous scattering light between just
Beginning phase difference, the phase difference meetsAlthough there being aerial array spatial arrangement in two subelements
Difference, but its structural parameters is identical, therefore from two subelements gained scattering light amplitude it is identical, space overlap it
The oval thickness for determining polarization state can be obtained afterwards.
(2) interval modulation layer
In order to realize that super clever surface is adjustable to the dynamic of polarization state, it is necessary to introduce adjustable phasing scheme, accordingly, it is considered to draw
Enter by the use of phase-change material as interval modulation layer.Interval modulation bar shaped silicon and bar shaped GST of the layer comprising One Dimension Periodic arrangement, and point
Wei Yu not be between subelement 1, subelement 2 and substrate.The thickness of interval modulation layer can flexibly be chosen, but need in certain value
In the range of, to ensure that subelement introduces enough phase-modulations when GST refractive indexes change and ensures scattering efficiency.
Beneficial effect
1st, heretofore described technical scheme utilizes the super clever surface based on metal V-type nanotube antenna array, with reference to the cycle
The Ge-Sb-Te GST modulating layers of arrangement, there is provided a kind of high speed in middle-infrared band work, flexible carried out to transmission polarization state
The method of any regulation and control, the ellipse inclined transmission of random polarization state can be generated under linear polarization normal incidence in any direction
Light, gained polarization state can realize that dynamic is adjustable, it is possible to resolve current super clever surface polarizer is difficult to dynamic polarization regulation and control
Problem.Especially, the achievable gained target polarization light of the present invention is separated with background beam, it is to avoid cross-talk.
2nd, the present invention utilizes the phase modulating properties on super clever surface, with reference to extensive in repeating erasable data storage in business
The phase-change material Ge-Sb-Te GST for using, carries out adjustable polarization conversion.The phase-change material cost is relatively low, in femtosecond laser pumping,
Heat baking etc. can flexible conversion crystalline state and amorphous state under extrinsic motivated, it is possible to repeatedly uses, is remarkably improved device steady
It is qualitative, extend its dynamic application scope.
3rd, the present invention is a kind of all solid state, ultra-thin, planar device, it is not necessary to the operation such as any mechanical stretching, rotation.This hair
It is bright be widely portable to minimize, be miniaturized, among integra-tion application, particularly laser communication system, Polarization Detection system it
In, system complexity is significantly reduced, effectively mitigate its volume and weight.And can be a kind of using providing on the piece of integrated optics
Flexible control measures.
Brief description of the drawings
Fig. 1 is based on the device architecture schematic diagram of super clever surface-any adjustable polarization state of phase-change material composite construction generation；Its
Middle antenna structure view (a), super clever surface-phase-change material composite construction schematic diagram (b).
Fig. 2 produces and detects the light path schematic diagram of the adjustable oval thickness of dynamic；
The polarization analysis of the abnormal transmitted light obtained by GST different refractivities is taken under Fig. 3 extrinsic motivateds；Wherein gained circular polarization
The relation (a) with GST variations in refractive index, difference GST refractive indexes correspondence gained polarization ellipse (b), gained polarization is spent to be reflected with GST
The relation of rate change.
Wherein, 1- lasers；The 2- polarizers；The speculums of 3- first；4- femto-second lasers；5- attenuators；6- pulse choices
Device；The 4f telescopic system lens of 7- the；The 4f telescopic system lens of 8- the 2nd；9- beam cementing prisms；10- device surfaces；11- backgrounds
Light；The speculums of 12- second；13- analyzers；14- power meters.
Specific embodiment
The present invention will be described in detail with reference to the accompanying drawings and examples.Specific implementation described herein is only used to solve
The present invention is released, is not intended to limit the present invention.
Below with operation wavelength as λ=4 μm of super clever surface as a example by, propose a kind of based on super clever surface-phase-change material
Random polarization dynamic regulation device and method.Wherein, a kind of random polarization state dynamic regulation based on super clever surface-phase-change material
Device is made up of V-type nano-antenna layer, interval modulation layer and substrate, as shown in Figure 1.The design process of the device includes two
Key step：
(1) super clever surface V-type nanotube antenna array design
Son comprising two different arrangement modes in the signal period on the super clever surface based on V-type nanotube antenna array is single
Unit, is mainly used to produce surface phase gradient, thus produce deviate sample normal, along anomalous refraction direction propagate two beams it is orthogonal
Polarised light, and with fixed phase difference.The scattered field of individual antenna can be expressed as the form in formula (2), such as Fig. 1 (a) institutes
Show.Its scattered wave can be broken down into symmetric pattern and is superimposed with the complex amplitude of antisymmetric mode, i.e. (Si+Ai) and (Si-Ai) point
Amount, their polarization direction is respectively α and 2 β-α with y-axis angle.Can take as follows for the selection of V-type nano-antenna parameter
Method：By V-type nano-antenna symmetry axis and y-axis angle in 45 ° of placements, the width and thickness of fixed V-type nano-antenna, using tight
Grid vector simulation software scans the brachium and angle of V-type nano-antenna, when the light wave normal incidence for polarizing in the x-direction to super clever surface
When, its 2 β-α directions polarized component is polarized along the y-axis direction just, so can effectively reduce the difficulty that emulation data are extracted.Root
According to the relation of the β-α components scattered amplitude of V-type nano-antenna 2, phase and V-type nano-antenna brachium and angle obtained by scanning, can
Carefully to choose suitable V-type nano-antenna parameter, it is ensured that | Si-Ai| substantially constant, and (Si+1-Ai+1) and (Si-Ai) phase
The difference of position is 2 π/N, and N is the number of antenna in a subelement；And | Si+Ai| amplitude, and (Si+1+Ai+1) and (Si+
Ai) phase is substantially constant.By the parameter and arrangement mode that design V-type nanotube antenna array so that 2 in the case of normal incidence
The scattered wave of β-α polarized components can be along anomalous refraction direction θt=arcsin (λ/D) is propagated, and is passed along the scattering light that α is polarized
Direction is broadcast perpendicular to sample surfaces.In the present embodiment, N=8, incident light polarization angle α=45 °, subelement x directions length are chosen
D=7.5 μm, the square-lattice length of side where each antenna is 937.5nm, and 4 groups are selected not for the V-type nano-antenna in subelement
Same parameter, the brachium L of preceding four antennas is respectively 457nm, 418nm, 302nm and 244nm, and antenna aperture angle θ is respectively
60 °, 90 °, 120 ° and 180 °, can so make (Si-Ai) component phase distribution phase difference of pi/8 successively, remaining four groups of V-types nanometer
Antenna only needs to make reverse-phase by the symmetry axis of above-mentioned antenna is rotated by 90 ° along y-axis, so that the aerial array can
Constant surface phase gradient is produced, and amplitude preservation is constant, such as Fig. 1 (b) is shown, now anomalous refraction angle θt=arcsin
(λ/D)≈32°.It is worth noting that, now the angular aperture of antenna 4 and 8 is 180 °, its structure has deteriorated to single-arm antenna.Phase
Than in V-type nano-antenna, single-arm antenna scattered amplitude is more sensitive to surrounding dielectric environment, when GST refractive indexes increase, it dissipates
Penetrating amplitude can experience larger vibration, but the amplitude variations of this respective antenna can't significantly change dissipating for whole super clever surface
Penetrate efficiency.
Because two subelements in signal period possess identical structural parameters, therefore, two subelements
Produce along the anomalous scattering light of equidirectional propagation, but two sub- element antennas towards angle beta1And β2β need to be met2-β1=45 °, i.e.,
(2β2-α)-(2β1- α)=90 ° with cause two anomalous scattering light polarization directions be mutually perpendicular to, β is taken as in the present embodiment respectively1=
67.5 ° and β2=112.5 °.The orthogonality is unrelated with incident light polarization direction α, be only dependent upon two subelement antennas towards angle beta1
And β2Difference.In addition, offset d in the x-direction can control the phase difference between two scattering light, the phase difference to meetHere d can arbitrarily choose, and this only determines that, when substrate is uniform, whole device is defeated
The polarization state for going out, plays phase zeroing.In this implementation offset d be taken as D/4=1.875 μm so that proper GST refractive indexes with
When Si base refractive indexes are identical, outgoing is circularly polarized light.
(2) interval modulation layer
The interval modulation main scattering phase difference between two subelements of dynamic regulation of layer.GST is at 2.8 μm to 5.5 μ
There is a transmission window between m, the absorption of material can be ignored in this range of wavelengths.Now GST turns from amorphous state
When being changed into crystalline state, its refractive index can be varied widely.And if using suitable optics, electricity or thermal means, it is somebody's turn to do
Process is reversible.The refraction index changing of GST materials can significantly affect the local surface of the V-type antenna of the subelement on GST layers
Phasmon resonance, this will cause V-type antenna resonance peaks to translate, and significantly change phase of the light in this assembly of thin films
Accumulation, and the V-type antenna influence for being pointed to subelement on silicon layer can almost be ignored.The wideband resonance of V-type nano-antenna is special
Property cause its in GST variations in refractive index scattered amplitude change it is smaller, and phase experience large change.Emulated using strict vector
Software, can be verified in GST layers of variations in refractive index, to V-type nano-antenna with-GST layers-substrate of V-type nano-antenna sandwich construction
The modulation of scattering nature.In emulation, V-type nano-antenna symmetry axis is same with y-axis angle to be placed in order to emulate data in 45 °
Extract.
It is its thickness that interval modulation layer needs the parameter of control, and the thickness of GST can influence antenna resonance peaks in identical refraction
The size of distance and the electromagnetic wave phase accumulation in assembly of thin films translated under rate situation of change.Therefore, GST thickness degree can be with
Phase-adjusted scope is determined, too small thickness is not enough to bring enough phase accumulations, causes phase adjustment range smaller, mistake
It is excessive that big thickness can cause resonance peak to drift about, and influences scattering efficiency.The selection of GST thickness needs to ensure enough phase adjusteds
Scope and scattering efficiency so that the antenna on subelement 2 can experience less amplitude variations, and keep larger phase
Delay variation；At the same time the antenna scattering property on subelement 1 is basically unchanged.GST variations in refractive index scopes are also present simultaneously
Limitation, if variations in refractive index is excessive, can cause the resonance peak of V-type nano-antenna will thoroughly remove operating wavelength area, lead
Cause scattered amplitude greater loss.Simultaneously as conceptual checking, variations in refractive index starting point could be arranged to n=3.Using strict
Vector simulation software is emulated, and can obtain GST thickness degree between 500nm to 800nm, and refractive index is changed to n=4.5 from n=3
When, the light field scattered by V-type nano-antenna is reached the phase-modulation of π, and the scattered amplitude being consistent.This reality
Apply in example, GST thickness degree is taken as 500nm.Therefore, can be controlled respectively from two subelements by controlling the refractive index of GST
Phase difference between orhtogonal linear polarizaiton scattering light, two bunch polarised lights are after space overlap, you can obtain adjustable polarization state
Control.
The device of random polarization dynamic regulation method is realized, as shown in Fig. 2 the outgoing of laser 1 is passed through by modulation laser
Inclined device 2 obtains linearly polarized light, and beam cementing prism 9 is reflexed to through the first speculum 3；The outgoing femtosecond pulse of femto-second laser 4 is passed through
Beam cementing prism 9 is incident to after attenuator 5 and pulse selector 6 and 4f telescopic systems lens 7,8；By modulation laser and femtosecond arteries and veins
Device surface 10 is incident to after impulse light ECDC beam can obtain two beam emergent lights, and bias light 11 is propagated along sample surfaces normal, taken
The object penetrating optical propagation direction of polarization state deviates device surface normal needed for band, by after the second speculum 12 with analyzer 13
Reach power meter 14.The energy for adjusting femto-second laser by impulse regulator is exported to control GST variations in refractive index scopes.
The circular polarization of the oval thickness that the super clever surface is obtained when GST refractive indexes are modulated from n=3 to n=4.5, energy
Amount distribution, the polarization analysis of the expression and gained polarization state of polarization ellipse, polarization state in poincare sphere is respectively such as Fig. 3 (a-d)
It is shown.Here circular polarization is defined as | ILCP-IRCP|/|ILCP+IRCP|, wherein ILCPAnd IRCPRepresent respectively left circularly polarized light and
The light intensity of right-circularly polarized light.Polarization analysis can measure power output and obtain by rotation analyzer 13 and power meter 14.In n=
Can respectively obtain high-quality circular polarization state and linear polarization during 3.4 and n=4.2, and middle all polarization states can be with
It is continuous to obtain, shown in such as Fig. 3 (b), (d).
The present invention is based on the super clever surface of V-type nanotube antenna array, by the phase-modulation for introducing the GST compositions that the cycle arranges
Layer, can realize arbitrary polarization state synthesis in the phase difference of extrinsic motivated modulated difference subelement outgoing orthogonal polarisation state.Should
Method is a kind of all solid state modulator approach, it is not necessary to the mechanics modulation means such as any stretching or rotation, and due to drawing
Enter surface phase gradient, the abnormal transmission-polarizing light for producing has certain angle with former ordinary transmission light direction, to avoid handing over
Fork crosstalk.The method provides a kind of flexible control measures to be applied on the piece of integrated optics, is expected to be widely used in optics
Among component miniaturization, miniaturization, integra-tion application.
Claims (4)
1. the random polarization dynamic regulation device of super clever surface-phase-change material is based on, it is characterised in that：By V-type nano-antenna layer,
Interval modulation layer and basalis are constituted；V-type nano-antenna each periodic unit of layer includes two parts subelement, and subelement is by having
The V-type nanotube antenna array for having different arrangement modes is constituted, and two parts subelement generates the mutually orthogonal line in polarization direction respectively
Polarization scattering light；The V-type nanotube antenna array has surface phase gradient so that the direction of propagation of score polarization scattering light is inclined
From incident direction, that is, surface normal direction is no longer normal to, to reduce the cross-talk of bias light；Interval modulation layer is arranged by the cycle
The silicon and GST of row constitute one-dimensional grating, and they are respectively placed in two between subelement and substrate, are used to adjust two subelements
Between scattering phase difference.
2. the random polarization dynamic regulation method of super clever surface-phase-change material is based on, it is characterised in that：By modulation laser and femtosecond
Laser is irradiated on device surface after closing beam；The energy of femtosecond laser adjusts to realize in device by pulse selector
The regulation and control of GST Refractive Index of Material, and then realize the regulation and control to outgoing object penetrating polarization state.
3. the device of the random polarization dynamic regulation method based on super clever surface-phase-change material as claimed in claim 2 is realized,
It is characterized in that：Including laser (1), the polarizer (2), the first speculum (3), femto-second laser (4), attenuator (5), pulse
Selector (6), 4f telescopic systems lens (7), the 2nd 4f telescopic systems lens (8) beam cementing prism (9), device surface
(10), bias light (11), the second speculum (12), analyzer (13) and power meter (14)；
Annexation：Laser (1) outgoing obtains linearly polarized light by modulation laser by the polarizer (2), through the first speculum (3)
Reflex to beam cementing prism (9)；Femto-second laser (4) outgoing femtosecond pulse through attenuator (5) and pulse selector (6) and
Beam cementing prism (9) is incident to after first 4f telescopic systems lens (7) and the 2nd 4f telescopic systems lens (8)；By modulation laser with
Device surface (10) is incident to after femtosecond pulse ECDC beam can obtain two beam emergent lights, and bias light (11) is along sample surfaces method
Line is propagated, and the object penetrating optical propagation direction of polarization state deviates device surface normal needed for carrying, by the second speculum (12)
Power meter (14) is reached afterwards with analyzer (13).
4. the random polarization dynamic regulation device of super clever surface-phase-change material is based on as claimed in claim 1, and its feature exists
In：The method for designing of the V-type nanotube antenna array is as follows：
V-type nano-antenna can form two kinds of eigen modes with the resonance of light field：Symmetric pattern and antisymmetric mode；If incident ray
Polarization light polarization direction now only excites its symmetric pattern parallel to its symmetry axis；If incident light polarization direction is right perpendicular to its
Claim axle, now then only have antisymmetric mode and be excited；Generally, if any direction linearly polarized light vertical incidence is to sample table
Face, then have：
Wherein α and β are respectively the angles of incident ray polarized light polarization direction, antenna symmetry axle and y-axis,WithRepresent respectively parallel
With the unit vector of vertical antenna symmetry axis, SiAnd AiI-th antenna symmetry pattern and antisymmetric mode in subelement are represented respectively
Scattering complex amplitude；The scattered field of the antenna can further be write as：
Wherein x and y are respectively the unit vector along x-axis and y-axis；
As can be seen that scattered wave can be broken down into symmetric pattern and is superimposed with the complex amplitude of antisymmetric mode from formula (2), i.e. (Si
+Ai) and (Si-Ai) component；Their polarization direction is respectively α and 2 β-α with y-axis angle；Joined by accurate selection antenna structure
Number, it is possible to achieve | Si-Ai| substantially constant, and (Si+1-Ai+1) and (Si-Ai) difference of phase is 2 π/N, N is that a son is single
The number of antenna in unit；And | Si+Ai| amplitude, and (Si+1+Ai+1) and (Si+Ai) phase is substantially constant；So can be with
Allow the scattered wave of 2 β-α polarized components in the case of normal incidence along abnormal refraction angle θt=arcsin (λ/D) is propagated, λ in formula
It is incident wavelength, D is the length in subelement x directions；And along the scattering optical propagation direction of α polarizations perpendicular to sample surfaces；
Meanwhile, two subelements in each periodic unit possess identical structural parameters, but exist in x directions and offset
D, as shown in Figure 1；Therefore, two subelements can be produced along θtThe anomalous scattering light that=arcsin (λ/D) direction is propagated, and
And due to subelement in the y-direction spaced far much smaller than wavelength, it can thus be assumed that its scattering light spatial coherence；Additionally, two sons are single
First antenna towards angle beta1And β2Meet β2-β1=45 °, i.e. (2 β2-α)-(2β1- α)=90 ° with cause two scatter light polarization directions
It is mutually perpendicular to；Also, offset d in the x-direction can control the initial phase between the two beam anomalous scattering light produced by subelement
Potential difference, the phase difference meetsAlthough aerial array spatial arrangement has area in two subelements
Not, but its structural parameters is identical, therefore from two subelements gained scattering light amplitude it is identical, after space overlap
The oval thickness for determining polarization state can be obtained.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710072725.5A CN106681026B (en) | 2017-02-10 | 2017-02-10 | Random polarization dynamic regulation device and method based on super clever surface-phase-change material |
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| CN107275791A (en) * | 2017-06-15 | 2017-10-20 | 中国人民解放军空军工程大学 | Artificial surface phasmon coupler based on the super surface of transmission-type phase gradient |
| CN107357054A (en) * | 2017-08-01 | 2017-11-17 | 中国科学院半导体研究所 | A kind of Reflective spatial light beam polarisation distribution regulates and controls device |
| CN107831607A (en) * | 2017-12-15 | 2018-03-23 | 中国科学院光电技术研究所 | Phase-change material-based adjustable broadband polarization conversion and dynamic geometric phase modulation device |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303429A (en) * | 2011-06-21 | 2012-01-04 | 电子科技大学 | Tunable flat absorbing material for electromagnetic waves |
| US20160334758A1 (en) * | 2015-05-11 | 2016-11-17 | Purdue Research Foundation | System for producing ultra-thin color phase hologram with metasurfaces |
-
2017
- 2017-02-10 CN CN201710072725.5A patent/CN106681026B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303429A (en) * | 2011-06-21 | 2012-01-04 | 电子科技大学 | Tunable flat absorbing material for electromagnetic waves |
| US20160334758A1 (en) * | 2015-05-11 | 2016-11-17 | Purdue Research Foundation | System for producing ultra-thin color phase hologram with metasurfaces |
Non-Patent Citations (3)
| Title |
|---|
| CHENG HUNG CHU: "Active dielectric metasurface based on phase-change medium", 《LASER PHOTONICS REV》 * |
| E. PETRONIJEVIC: "All-optical tuning of EIT-like dielectric metasurfaces by means of chalcogenide phase change materials", 《OPTICS EXPRESS》 * |
| NANFANG YU: "A Broadband, Background-Free Quarter-Wave Plate Based on Plasmonic Metasurfaces", 《 NANO LETT.》 * |
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