CN107340559B - High efficiency and broad band circular polarization switching device and method based on super clever surface - Google Patents
High efficiency and broad band circular polarization switching device and method based on super clever surface Download PDFInfo
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
- G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
Abstract
High efficiency and broad band circular polarization switching device and method disclosed by the invention based on super clever surface, belongs to micronano optical applied technical field.High efficiency and broad band circular polarization switching device disclosed by the invention based on super clever surface is composite construction, including nano-antenna layer, spacer dielectric layer and metallic substrate layer.Nano-antenna layer is to generate specific phase and amplitude modulation to incident linearly polarized light；Phase change of the spacer dielectric layer to accumulate light wave；Metallic substrate layer improves the overall conversion efficiency of device for reflecting the light wave propagated in metallic substrates layer surface；Nano-antenna layer, spacer dielectric layer and metallic substrate layer integrally form optical resonator, and the light beam propagated in optical resonator can be made to generate Fabry-Perot multiple-beam interference effect.Invention additionally discloses the high efficiency and broad band circular polarization conversion methods based on super clever surface based on the circular polarization switching device realization.The present invention can be realized efficient and broadband the modulation to outgoing circularly polarized light.
Description
Technical field
The present invention relates to a kind of high efficiency and broad band circular polarization switching device and method based on super clever surface, belongs to micronano optical
Applied technical field.
Background technique
Polarization state is one of important attribute of electromagnetic wave.The polarization state for controlling electromagnetic wave, realizes the conversion of different polarization states,
It is all had a wide range of applications in fields such as optical sensing, imaging, communication, chemical analyses.Control the polarization state of electromagnetic wave, Ke Yitong
It crosses for incident light to be decomposed into after two orthogonal beam components and reaches required phase delay.The conventional method of modulating polarization state
It is based primarily upon anisotropic material, such as with the material of birefringence, when light is not along principal-axis incident, ordinary light and non-is sought
Different phase change accumulation is generated between ordinary light, phase difference is formed in outgoing, to realize the conversion of polarization state.In general,
Birefringent material in nature has crystal and liquid crystal etc..The shortcomings that this traditional methods mainly include narrow bandwidth, large scale with
And can material category it is few, be unfavorable for the micromation of optical device and integrated.
Scientific research personnel has carried out a large amount of research work to metamaterial in recent years.Metamaterial is a kind of engineer
The structure of sub-wavelength dimensions has the novel physics characteristic being not present in nature material.A variety of light based on metamaterial
Electricity Functional application has been suggested and has proved, such as negative refraction, super lens and " stealthy cape " etc..The super clever material of anisotropy
Material, chiral metamaterial etc. have been supplied in microwave into all kinds of polarization converter devices of visible light wave range.However, three-dimensional super clever material
For material there are processing technology difficulty and large volume inconvenience, a feasible way for solving this kind of difficulty is to utilize super clever surface.It is super
Clever surface is made of the sub-wavelength size metallic of sophisticated design or media units two-dimensional array, and thickness is much smaller than wavelength.It is logical
Reasonable structure design is crossed, the scattered field of each pixel can be changed point by point in its plane, to control corresponding phase, amplitude
And polarization state, the final any required modulation realized to wavefront.
Super clever surface can widen bandwidth of operation, have preferable robustness and consume lower processing cost, by more next
It is applied in integrated nanometer photonic device more.Regulation is carried out using polarization state of the super clever surface to electromagnetic wave to have attracted largely
The research interest of scientific research personnel.By the cellular construction on the super clever surface of sophisticated design single-layer or multi-layer, a variety of polarizations can be obtained
The regulation and control scheme of state, such as: using metal antenna-dielectric layer-metal layer structure setting, the effect at 685nm may be implemented
The linear polarization that rate is 96% converts (Phys.Rev.Applied.80,023807,2009)；Utilize cascade four layers of wire grating
Thin plate, can at 2 μm of wavelength by the light wave of focusing from linear polarization be converted to circular polarization state (Appl.Phys.Lett.102,
231116,2013)；Using double super clever surfaces of F type metal aperture single layer, it can be achieved that the broadband line polarization conversion in terahertz wave band is imitated
Fruit, efficiency of transmission are no more than 40% (Opt.Lett.13,3185-8,2015)；The super clever surface of single layer based on metal bar structure
Polarization converter, can near infrared band carry out broadband line-circular polarization mutually convert, efficiency be no more than 40%
(Sci.Rep.5,18106,2015)；By combining grapheme material, it can be achieved that line-circle in terahertz wave band wideband operation is inclined
Vibration conversion and line-linear polarization conversion, efficiency of transmission are not higher than 50% (Opt.Lett.23,5592-55952016).As it can be seen that
In reported super clever surface polarization converter device, there is the device of high conversion efficiency and wideband operation simultaneously near infrared band
Part is relatively difficult to achieve, and which has limited its applications.
Summary of the invention
It is of the invention in order to solve the problems, such as that the polarizer for being currently based on super clever surface is difficult to realize high efficiency and broad band regulation
Purpose is to provide a kind of super clever surface circular polarization switching device based on double mirror image antenna, also provides based on described
Circular polarization switching device the high efficiency and broad band circular polarization conversion method based on super clever surface, realize to outgoing circularly polarized light height
The modulation of effect and broadband.
High efficiency and broad band circular polarization switching device disclosed by the invention based on super clever surface is composite construction, including nanometer day
Line layer, spacer dielectric layer and metallic substrate layer.Nano-antenna layer is to generate specific phase and vibration to incident linearly polarized light
Width modulation, is formed by being arranged into array with the symmetrical nano-antenna of double mirror image, and each nano-antenna unit includes one
Nano-antenna, the nano-antenna unit unit size are much smaller than wavelength.Spacer dielectric layer changes to accumulate the phase of light wave
Become, material selection dielectric.Metallic substrate layer improves the whole of device for reflecting the light wave propagated in metallic substrates layer surface
Body transfer efficiency.Spacer dielectric layer between nano-antenna layer and metallic substrate layer, nano-antenna layer and spacer dielectric layer
Thickness meets within the scope of sub-wavelength.Nano-antenna layer, spacer dielectric layer and metallic substrate layer integrally form optical resonator, energy
The light beam propagated in optical resonator is enough set to generate Fabry-Perot multiple-beam interference effect.
The nano-antenna layer design method are as follows:
The polarization state of electromagnetic wave can be characterized with Jones matrix, and planar optical device characterizes the modulation of light with collision matrix.
Plane where super clever surface is the scattering array of salt free ligands, and collision matrix indicates are as follows:
Wherein, θ is incidence angle, and a, b, c, d are complex coefficients.Super clever surface can couple the magnetic of tangential electric field and normal direction
, when the tangential electric field of incident light is identical with the magnetic-field component of normal direction, the excitation to super clever surface is also identical.
Meanwhile under conditions of no complementary field, Lorentz reciprocal theorem is set up.According to matrix analysis, when super clever surface receives
When the light excitation of normal incidence, under conditions of lossless, the matrix element in collision matrix meets relationship: a=d, | b |=| c |.
Further, it for two-dimentional achirality cellular construction, can be overlapped with its mirror-image structure by the rotation process in face.Therefore,
When light normal incidence is to the super clever surface being made of achirality antenna structure, forward entrance and reversed incident light will be with a pair of of mirrors
As structural interaction, it that is to say and interact with the cellular construction before and after certain angle of rotation.By defining in collision matrix
Nondiagonal element obtains the parameter in the phase term of nondiagonal element b, cThe orientation of forward-propagating eigenstate corresponding to collision matrix
Angle, while also corresponding to the deflection of the mirror symmetry of achirality structure under the conditions of normal incidence.Therefore, by two-dimentional achirality list
The super clever surface that member is constituted carries out the rotation of certain angle, that is, leads to the rotation of the respective angles of its collision matrix eigenstate.Due to
The structural symmetry of two-dimentional achirality cellular construction, can be overlapped after rotating with original structure, that is to say and correspond to rotation front and back
Collision matrix is equal.By the equal relationship of rotation front and back collision matrix, the phase relation between nondiagonal element b, c is solved, is obtained
To the expression formula of the collision matrix on the super clever surface being made of under the conditions of normal incidence achirality antenna structure:
Wherein κ andIt is the parameter in the phase term of nondiagonal element b, c.For there is birefringence under the conditions of lossless
Super clever surface, by solve conservation of energy constraint condition under parameters relationship, obtain one group and specifically solve:The expression formula of collision matrix after further writing out constraint:
In order to obtain the eigenstate of circular polarization, selectWherein n is integer.It is updated in formula (3),
It can be obtained the collision matrix of circular polarization eigenstate:
Therefore, the nano-antenna with double mirror symmetry is selected, suitable unit cycle set, and setting are passed through
The polarization direction of incident ray polarized light and the mirror axis angle of achirality structure are 45 ° or 135 °, have nano-antenna layer
Just like collision matrix shown in formula (4).It should be noted that incident light, is usually first decomposed into mutually by the regulation for polarization
Perpendicular polarized component reaches the polarization conversion effect being finally superimposed by the phase difference between control component.Therefore, right
When the geometric parameter of nano-antenna layer is set, needing to meet nano-antenna layer has not the linearly polarized light in the direction x and y
Same resonance frequency, so as to guarantee that device has wider service band range.
The spacer dielectric layer design method are as follows:
In order to realize the effect of accumulated phase, using spacer dielectric layer, spacer dielectric layer is transparent medium for electromagnetic wave.
Spacer dielectric layer thickness is adjustable, by control interval thickness of dielectric layers, can obtain polarization conversion in different frequency scope and
The circular polarization conversion effect of different rotation directions.
The preferred Ω type nano-antenna layer of the nano-antenna layer.Linearly polarized light of the Ω type nano-antenna for the direction x and y
With different resonance frequencies, so as to guarantee that device has wider service band range.
The Ω type gold nano antenna element size is in sub-wavelength range.
The preferred MgF of blank medium layer material2。
The metallic substrate material is preferably golden.
Invention additionally discloses the high efficiency and broad band circular polarization switching device based on super clever surface realize based on super clever surface
High efficiency and broad band circular polarization conversion method, the light beam for being incident to the high efficiency and broad band circular polarization switching device surface based on super clever surface are
Incident light polarization direction is modulated at 45 ° with the antenna mirror axis of device surface by the laser that will be modulated through the polarizer
Or the linearly polarized light at 135 ° of angles, it is incident on device surface along circular polarization switching device normal to a surface direction.Linear polarization enters
After penetrating light and the interaction of circular polarization switching device, enough phase changes are accumulated, and are had close to lossless reflection, reflection
The polarization state of light is circular polarization, to realize efficient and broadband the modulation to outgoing circularly polarized light.
High efficiency and broad band circular polarization switching device and method disclosed by the invention based on super clever surface, service band are communicating
In optical band, there is stronger application.
The utility model has the advantages that
1, the high efficiency and broad band circular polarization switching device and method disclosed by the invention based on super clever surface, using based on having
The super clever surface of the nanotube antenna array of double mirror symmetry provides one kind and exists in conjunction with spacer dielectric layer and metallic substrate layer
The efficient, broadband of near infrared band work carries out line-circle conversion method to reflection polarization state, can be in ± 45 ° of directions
The reflected light of circular polarization state is generated under linear polarization normal incidence, gained reflection circularly polarized light has the effect of ultra wide band,
And the transfer efficiency with superelevation solves current super clever surface polarizer and is difficult to realize asking for high efficiency and broad band polarization regulation
Topic.Particularly, service band of the present invention has stronger application in telecommunications optical band.
2, the high efficiency and broad band circular polarization switching device disclosed by the invention based on super clever surface be it is a kind of it is all solid state, ultra-thin,
Planar wave component, does not need any mechanical stretching, the operation such as rotation, therefore, disclosed by the invention based on super clever surface
High efficiency and broad band circular polarization switching device and method are widely portable to miniaturization, are miniaturized, among integrated photovoltaic applications, special
It is not laser communication system, among Polarization Detection system, effectively mitigates its volume and weight, and can be the on piece of integrated optics
Using provide it is a kind of efficiently and the modulator approach in broadband.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the high efficiency and broad band circular polarization switching device based on super clever surface；(a) three-decker is illustrated
Figure, (b) Ω type antenna unit structure schematic diagram；Wherein: 1-nanotube antenna array, 2-spacer dielectric layers, 3-metallic substrates
Layer；
Fig. 2 is two-dimentional achirality cellular construction and its mirror-image structure schematic diagram；
Fig. 3 is linearly polarized light normal incidence that the angle of polarization is 45 ° to the high efficiency and broad band circular polarization converter based on super clever surface
The reflectance map of part.(a) amplitude of reflected light x-component and y-component, (b) phase of reflected light x-component and y-component；
Fig. 4 is reflected light stokes parameter.(a) angle of polarization is the linearly polarized light vertical incidence of 45 ° and -45 ° to device
The stokes parameter of the reflected light on surface, (b) the linearly polarized light oblique incidence that the angle of polarization is 45 ° to the height based on super clever surface
The stokes parameter of reflected light that effect wideband circular polarization switching device surface obtains, wherein incidence angle be respectively 15 °, 30 ° and
45°；
Fig. 5 is the stokes parameter absolute value of reflected light when incident light polarization angle changes within the scope of 0 °~360 °.
Specific embodiment
Present invention is described with reference to the accompanying drawings and examples.Specific implementation described herein is only to explain this
Invention, is not intended to limit the present invention.
Embodiment 1:
For verify the high efficiency and broad band circular polarization switching device and method feasibility disclosed by the invention based on super clever surface with
Beneficial effect, below by taking operation wavelength is the super clever surface of λ=1.2 μm~1.6 μm as an example.
As shown in Figure 1, the circular polarization switching device of the high efficiency and broad band based on super clever surface disclosed in the present embodiment is compound
Structure, including Ω type nano-antenna layer 1, spacer dielectric layer 2 and metallic substrate layer 3 are constituted.Ω type nano-antenna layer 1 is to entering
The linearly polarized light penetrated generates specific phase and amplitude modulation, by being arranged into battle array with the symmetrical Ω type nano-antenna of double mirror image
Column are formed, and each Ω type nano-antenna unit includes a Ω type nano-antenna, the Ω type nano-antenna unit unit
Size is much smaller than wavelength.Phase change of the spacer dielectric layer 2 to accumulate light wave, material selection dielectric.Metallic substrate layer 3 is used
The light wave in metallic substrates layer surface is propagated in reflection, improves the overall conversion efficiency of device.Spacer dielectric layer 2 is located at nanometer
Between antenna stack and metallic substrate layer 3, the thickness of Ω type nano-antenna layer 1 and spacer dielectric layer 2 meets within the scope of sub-wavelength.
Ω type nano-antenna layer 1, spacer dielectric layer 2 and the whole composition optical resonator of metallic substrate layer 3, can make in optical resonator
The light beam of propagation generates Fabry-Perot multiple-beam interference effect.
Ω type nano-antenna has different resonance frequencies for the linearly polarized light in the direction x and y, so as to guarantee device
With wider service band range.
The Ω type gold nano antenna element size is in sub-wavelength range.
The blank medium layer material selects MgF2。
The metallic substrate material selects gold.
The nano-antenna layer design method are as follows:
It include a Ω type metal structure in the individual unit period on the super clever surface based on Ω type nanotube antenna array, it is whole
A array is arranged into plane layer by multiple unit periodic structures, as shown in Figure 1.Ω type nano-antenna is that two-dimentional achirality is double
Mirror image, as shown in Fig. 2, collision matrix meets formula (3).The parameters of structural dimension of sophisticated design Ω type nano-antenna
As shown in Figure 1, the outer radius of the ring part of Ω type structure is 100nm, the length of two sides and opening is 80nm, and width is
50nm, period 320nm, such parameters of structural dimension can modulate the incident light of near infrared band.When the linear polarization of incident light
When angle is π/4 or-π/4, optimal circular polarization conversion effect is obtained, that is, meets the collision matrix of formula (4).Pass through Ω type nanometer
The setting of antenna stack 1 obtains the transmitted light and reflected light of circular polarization, and the two is oppositely oriented, and amplitude is equal, but efficiency is resonable
By it is upper respectively be 50%, still need to the transfer efficiency for further being designed and being improved reflected light.
The spacer dielectric layer design method are as follows:
Spacer dielectric layer 2 is mainly poor to change the accumulated phase of incident light, can be not by designing its thickness
With the circular polarization reflected light obtained in frequency range.Under different thickness conditions, the circularly polarized light of different rotation directions is obtained.Here selection is thick
Degree is that 50nm illustrates.
Incident light and Ω type nano-antenna layer 1 interact, and the eigenstate transmission and reflection of circular polarization are obtained, wherein transmiting
A part by unlimited secondary reflection and the transmission of spacer dielectric layer 2 and metallic substrate layer 3, be emitted from Ω type nano-antenna layer 1,
Optical superposition is reflected with front portion, ultimately forms circular polarization state reflected light.It is anti-when electromagnetic wave is decomposed into x and y durection component
The electric field component penetrated is equal in 185THz~250THz frequency range (1.2 μm~1.6 μm of corresponding wavelength) interior amplitude, and phase difference is about
90 °, as circular polarization state, as shown in Figure 3.Further using the polarization state of stokes parameter characterization reflected light, Stokes
The calculation formula of parameter is as follows:
As shown in Figure 4.As the S of stokes parameter0When close to 1, indicate total light intensity percentage close to 100%, tool
There is high conversion efficiency.The S of stokes parameter3When equal to 1 or -1, indicate it for left or right rotation circular polarization state.It can by Fig. 4
Know, when the angle of polarization of incident ray polarized light is 45 ° and -45 °, by the modulation of the device, in the width of 187THz~250THz
It can get oppositely oriented circular polarization reflected light in frequency range (1.2 μm~1.6 μm of corresponding wavelength), and transfer efficiency is higher than
92%.High efficiency and broad band circular polarization switching device based on super clever surface has certain flexibility and adjustability, when incident light inclines
When oblique incidence, elliptically polarized light or approximate rotatory polarization can be obtained, the slant range of incidence angle can reach ± 45 °, such as Fig. 4 institute
Show.The relationship of the angle of polarization is as shown in Figure 5 when the polarization state and normal incidence of reflected light.Figure middle latitude indicates the exhausted of stokes parameter
To value, longitude indicates the size of the angle of polarization.In the case where normal incidence, when incident light polarization angle is not equal to 45 °, it is based on super clever table
The high efficiency and broad band circular polarization switching device in face can carry out elliptical polarization conversion to it.
High efficiency and broad band circular polarization switching device based on super clever surface disclosed in the present embodiment be one kind it is all solid state, ultra-thin,
Planar wave component does not need any mechanical stretching, and the operation such as rotation, therefore, the present embodiment is disclosed to be based on super clever surface
High efficiency and broad band circular polarization switching device and method, be widely portable to miniaturization, micromation, among integrated photovoltaic applications,
Especially laser communication system among Polarization Detection system, effectively mitigates its volume and weight, and can be the piece of integrated optics
Upper application provides a kind of efficient and broadband modulator approach.
Above-described specific descriptions have carried out further specifically the purpose of invention, technical scheme and beneficial effects
It is bright, it should be understood that the above is only a specific embodiment of the present invention, the protection model being not intended to limit the present invention
It encloses, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection scope within.
Claims (5)
1. the high efficiency and broad band circular polarization switching device based on super clever surface, it is characterised in that: be composite construction, including nano-antenna
Layer (1), spacer dielectric layer (2) and metallic substrate layer (3)；Nano-antenna layer (1) is specific to generate to incident linearly polarized light
Phase and amplitude modulation, formed by being arranged into array with the symmetrical nano-antenna of double mirror image, each nano-antenna list
Member includes a nano-antenna, and the nano-antenna unit unit size is much smaller than wavelength；Spacer dielectric layer (2) is to accumulate
The phase change of light wave, material selection dielectric；Metallic substrate layer (3) propagates to metallic substrate layer (3) surface for reflecting
Light wave, improve the overall conversion efficiency of device；Spacer dielectric layer (2) be located at nano-antenna layer (1) and metallic substrate layer (3) it
Between, the thickness of nano-antenna layer (1) and spacer dielectric layer (2) meets within the scope of sub-wavelength；Nano-antenna layer (1), interval are situated between
Matter layer (2) and metallic substrate layer (3) integrally form optical resonator, and the light beam propagated in optical resonator is made to generate Fabry-
Perot multiple-beam interference effect；
Described nano-antenna layer (1) design method are as follows:
The polarization state of electromagnetic wave can be characterized with Jones matrix, and planar optical device characterizes the modulation of light with collision matrix；It is super clever
Plane where surface is the scattering array of salt free ligands, and collision matrix indicates are as follows:
Wherein, θ is incidence angle, and a, b, c, d are complex coefficients；Super clever surface can couple the magnetic field of tangential electric field and normal direction, when
When the tangential electric field of incident light is identical with the magnetic-field component of normal direction, the excitation to super clever surface is also identical；Meanwhile
Under conditions of no complementary field, Lorentz reciprocal theorem is set up；According to matrix analysis, when super clever surface receives normal incidence
Light excitation when, under conditions of lossless, the matrix element in collision matrix meets relationship: a=d, | b |=| c |；Further
, for two-dimentional achirality cellular construction, can be overlapped with its mirror-image structure by the rotation process in face；Therefore, when light just
When being incident on the super clever surface being made of achirality antenna structure, forward entrance and reversed incident light will be with a pair of of mirror-image structures
Interaction that is to say and interact with the cellular construction before and after certain angle of rotation；By defining the non-diagonal in collision matrix
Member obtains the parameter in the phase term of nondiagonal element b, cThe azimuth of forward-propagating eigenstate corresponding to collision matrix, simultaneously
Also correspond to the deflection of the mirror symmetry of achirality structure under the conditions of normal incidence；Therefore, two-dimentional achirality unit is constituted
Super clever surface carry out the rotation of certain angle, that is, lead to the rotation of the respective angles of its collision matrix eigenstate；Since two dimension is non-
The structural symmetry of chiral unit structure can be overlapped after rotating with original structure, that is to say the scattering square for corresponding to rotation front and back
Battle array is equal；By the equal relationship of rotation front and back collision matrix, the phase relation between nondiagonal element b, c is solved, is obtained just
The expression formula of the collision matrix on the super clever surface being made of under the conditions of incidence achirality antenna structure:
Wherein κ andIt is the parameter in the phase term of nondiagonal element b, c；For super with birefringence under the conditions of lossless
Clever surface is obtained one group and is specifically solved by the parameters relationship under solution conservation of energy constraint condition:The expression formula of collision matrix after further writing out constraint:
In order to obtain the eigenstate of circular polarization, selectWherein n is integer；It is updated in formula (3), can obtain
Obtain the collision matrix of circular polarization eigenstate:
Therefore, the nano-antenna with double mirror symmetry is selected, it is incident by suitable unit cycle set, and setting
The polarization direction of linearly polarized light and the mirror axis angle of achirality structure are 45 ° or 135 °, have nano-antenna layer (1)
The collision matrix as shown in formula (4)；It should be noted that incident light, is usually first decomposed into mutually by the regulation for polarization
Vertical polarized component reaches the polarization conversion effect being finally superimposed by the phase difference between control component；Therefore, to receiving
When the geometric parameter of rice antenna stack (1) is set, needs to meet nano-antenna layer (1) and have for the linearly polarized light in the direction x and y
There is different resonance frequencies, so as to guarantee that device has wider service band range.
2. as described in claim 1 based on the high efficiency and broad band circular polarization switching device on super clever surface, it is characterised in that: described
Spacer dielectric layer (2) design method are as follows:
In order to realize the effect of accumulated phase, using spacer dielectric layer (2), spacer dielectric layer (2) is transparent Jie for electromagnetic wave
Matter；Spacer dielectric layer (2) thickness is adjustable, by control interval dielectric layer (2) thickness, can obtain inclined in different frequency scope
The circular polarization conversion effect of vibration conversion and different rotation directions.
3. as claimed in claim 2 based on the high efficiency and broad band circular polarization switching device on super clever surface, it is characterised in that: described
Nano-antenna layer (1) preferably Ω type nano-antenna layer (1)；Ω type nano-antenna has difference for the linearly polarized light in the direction x and y
Resonance frequency, so as to guarantee device have wider service band range.
4. as claimed in claim 3 based on the high efficiency and broad band circular polarization switching device on super clever surface, it is characterised in that:
The Ω type gold nano antenna element size is in sub-wavelength range；
Described spacer dielectric layer (2) material selects MgF2；
Metallic substrate layer (3) material selects gold.
5. the high efficiency and broad band circular polarization conversion method based on super clever surface, it is characterised in that: based on such as claim 1,2,3,4
High efficiency and broad band circular polarization switching device described in one based on super clever surface is realized, the efficient width based on super clever surface is incident to
Light beam with circular polarization switching device surface is the laser that will be modulated, and is modulated to incident light polarization direction and device through the polarizer
The antenna mirror axis on part surface is at 45 ° or the linearly polarized light at 135 ° of angles, along circular polarization switching device normal to a surface side
To being incident on device surface；After linear polarization incident light and the interaction of circular polarization switching device, enough phase changes are accumulated,
And have close to lossless reflection, the polarization state of reflected light is circular polarization, thus realize to the efficient of outgoing circularly polarized light and
The modulation in broadband.
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Families Citing this family (27)
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