CN107340610A - Polarization-controlled graphene array multiband filter - Google Patents
Polarization-controlled graphene array multiband filter Download PDFInfo
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- CN107340610A CN107340610A CN201710714383.2A CN201710714383A CN107340610A CN 107340610 A CN107340610 A CN 107340610A CN 201710714383 A CN201710714383 A CN 201710714383A CN 107340610 A CN107340610 A CN 107340610A
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/0009—Materials therefor
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/0102—Constructional details, not otherwise provided for in this subclass
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- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Polarising Elements (AREA)
Abstract
The invention discloses a polarization-controlled graphene array multiband filter, and belongs to the field of photoelectric materials. The filter comprises a substrate and a graphene array structure layer from bottom to top in sequence, wherein the graphene array structure layer comprises a periodic array of graphene particles and an air slit composite structure. The air slits cut on the graphene particle structure and the slits are offset from the particle center position to form a particle pair structure which is spatially separated and has broken symmetry. According to the invention, based on the strong electromagnetic resonance effect of the graphene particles and the electromagnetic resonance and hybrid coupling of the symmetrically-broken particles to the structure, the spectrum-adjustable multiband filtering response is realized through the change of the polarization state of incident light. The multiband filter based on the graphene array structure layer is simple in structure, small in structure size, easy to integrate and capable of adjusting spectrum polarization, and can be widely applied to composite material filters or other photoelectric fields.
Description
Technical field
The present invention relates to the fields such as photoelectric material and photonic propulsion, and in particular to a kind of graphene array multifrequency for polarizing regulation and control
Band filter.
Background technology
Infrared frequency range in electromagnetic spectrum can be divided into near-infrared (0.76 μm~2.5 μm), in infrared (2.5 μm~25 μ
And three frequency ranges of far infrared (25 μm~1000 μm) m).In nature all objects can infrared radiation, by using spy
The infrared image that different Thermal Infra-Reds are formed can be obtained by surveying infrared ray difference of the instrument measurement target between background in itself.Air and
Smoke, mists and clouds etc. can absorb visible ray and near infrared ray, but be transparent to 8~14 μm of Thermal Infra-Red (in infrared frequency range).
Therefore, this frequency range is also referred to as " atmospheric window " of Thermal Infra-Red.It is in military affairs to carry out thermal infrared imaging using spectral technique
Provide advanced night-vision equipment and round-the-clock preceding viewing system.
Graphene (Graphene) is a kind of cellular flat film formed by single layer of carbon atom, and it only has an atom
The quasi- two-dimensional material of thickness degree, is called monoatomic layer graphite.Graphene have very good conduction, heat conduction, mechanical strength and
Pliability and optical characteristics, length is obtained in the field such as physics, materialogy, electronic information and computer, Aero-Space
The development of foot.The conduction electronics of graphene can interact to form couple electromagnetic mould (that is, phasmon is common with the photon of incidence
Shake), traditional optical diffraction limit can be broken through, therefore the information that can include as optical transmission apparatus in LMDS Light Coupled Device carries
Body.But single-layer graphene structure is only 2.3% to the absorptivity of visible ray and infrared frequency range light.Current investigative technique
How Effective Regulation graphene-structured to the spectral response characteristic of light wave or electromagnetic wave include graphene-structured in different frequency range
The controllable operating of spectrum notch response etc. very big technical barrier all be present.Such as disclosed patent application [application in the recent period
Numbers 201610062949.3, the A of application publication number CN 105700201], although providing a kind of optical filter based on graphene
Part, but structure needs to be related to dielectric substrate, metal electrode, graphene band array, dielectric layer, metal grating and substrate in itself
Etc. numerous structural detail and module, it is unfavorable for the simple preparation of device and integrated application.Recent invention disclosed patent application
[application number 201611235973.9, the A of application publication number CN 106684510] discloses a kind of face of opening six based on graphene
Annular Tunable dual band wave filter, although realizing the transmission filter response of double frequency-band, the base needed for structure in Terahertz frequency range
Many construction units such as plate, opening positive six face rings shape paster, inverted U-shaped paster, reverse L-shaped paster, L-shaped paster and inverted T-shaped paster
Substantially increase the structural complexity of such wave filter, inevitably limit its device prepare with it is integrated etc.
Using.Technically how to realize that optically filtering response of the artificial adjustment based on graphene-structured also has problem always simultaneously.
Artificial adjustment multiband graphene filter structure is even more a blank of prior art.In addition, the light of conventional art aspect
The deficiencies of physical dimension is larger, spectrum is untunable all be present including optically filtering device in transmission structure.
The content of the invention
For above-mentioned deficiency, the present invention in order to provide infrared frequency range in a kind of be operated in can be carried out by polarization state it is artificial
The multiband graphene array wave filter of regulation and control, it is intended to introduce grapheme material, the electromagentic resonance characteristic using graphene particles
And resonance effects by effect of polarization the features such as, simplify wave filter construction unit and increase spectrum controllable number of frequency bands
And the means and method of artificial adjustment.
The present invention is achieved through the following technical solutions：
The graphene array multiband filter of regulation and control is polarized, it includes substrate, graphene array structure sheaf, and its feature exists
In：It is made up of successively substrate and graphene array structure sheaf from bottom to top, the graphene array structure sheaf is by graphene particles
Formed with the cyclic array of air slots composite construction.The air slots are cut and narrow in graphene particles structure
The position skew granular center position of seam, formation is spatially separating and the particle of Broken Symmetry is to structure.The present invention is based on graphite
Forceful electric power magnetic resonance effect possessed by alkene particle and title property break scarce particle and the electromagentic resonance of structure are coupled with hydridization, pass through
The change of the polarization state of incident light, realize the regulatable multiband filter response of spectrum.
The structural symmetry of the graphene particles and air slots composition breaks the periodicity battle array of scarce graphene particles pair
Row pattern is arranged on substrate top surface.
The structure of the graphene particles is cylindrical structural.
The graphene array thickness degree is in 0.34nm-1nm scopes.
The material of the substrate is the materials such as glass, flexible material such as dimethyl silicone polymer and polymer.
The graphene array multiband filter structure of the polarization regulation and control can include ion sputtering by physical deposition methods
Method and magnetron sputtering method and lithographic technique include electron beam and laser etching techniques etc. to prepare.
The graphene array multiband filter of the polarization regulation and control of the present invention has the following advantages that：
1st, wave filter can realize effective manipulation to multiband spectral filtering by the regulation and control of polarization state.
2nd, by using resonance coupling unit of the graphene array structure as mid-infrared light, the graphene of Broken Symmetry is utilized
Particle provides structure strong optical scattering and forms different resonance hybrid patterns, realizes multiband filter effect.
3rd, by using graphene array structure, it is achieved thereby that the optically filtering response on nanoscale thickness, fundamentally
Overcome that the physical dimension that conventional optical setup faced is big, is unfavorable for the built in problems such as High Density Integration.
4th, infrared graphene array filtering spectrum scope generation infrared frequency range in multiband of the invention, i.e. Thermal Infra-Red
" atmospheric window ", be advantageous to the application for including thermal infrared imaging etc. in spectral technique.
5th, it is simple in construction, it is easy to prepare, is easy to carry out the system integration with other photoelectric devices.
6th, the optical resonance characteristic based on graphene array structure, it is easy to carry out the tuning of spectrum, produces in that infrared frequency range can
The optical filtration characteristic of tuning, all have in fields such as infrared acquisition, opto-electronic conversion, infrared imaging and heat radiators extensive
Application prospect.
Brief description of the drawings
Present disclosure is further described below in conjunction with the accompanying drawings.But the following drawings is only the ideal of the present invention
Change the schematic diagram of embodiment, wherein in order to clearly show the structure of device involved by the present invention, to wherein selected graphene battle array
The thickness and air slots width in array structure layer region have carried out appropriate amplification, but it should not be considered as sternly as schematic diagram
Lattice reflect the proportionate relationship of physical dimension.In addition, the embodiment shown in the present invention also should not be considered limited to institute in figure
The given shape in the region shown.In general, the following drawings is schematical that should not be considered as limiting the scope of the invention.
Fig. 1 is the structural representation for the graphene array multiband filter that regulation and control are polarized in the present invention；
Fig. 2 is the graphene array multiband filter structure hollow gas slit that regulation and control are polarized in the present invention in graphene
The position skew granular center position of structure cutting and slit is carried out on grain and is spatially separating and of Broken Symmetry so as to be formed
Grain is to structure and the schematic diagram of incident light polarization angle φ, the electric field resonance direction of incident ray polarized light and slit defined in it
The vertical angle selected counterclockwise is polarization state angle or polarization angle φ；
Fig. 3 is the light absorbs for the graphene array multiband filter that regulation and control are polarized in an optional embodiment of the invention
Figure.Graphene array thickness degree is 1nm, and graphene particles are cylindrical structural, a diameter of 400nm, thickness 1nm, array week
Phase size is 600nm, and the width of air slots is 40nm, and length 400nm, the array period size of air slots is 600nm,
Slit location skew granular center position δ=60nm.Substrate is PDMS membrane layer, thickness 500nm.Polarization angle
φ=0 ° and 45 °, correspond respectively to realize and the absorption line of dotted line.
Fig. 4 is the light absorbs for the graphene array multiband filter that regulation and control are polarized in an optional embodiment of the invention
Figure.Graphene array thickness degree is 1nm, and graphene particles are cylindrical structural, a diameter of 400nm, thickness 1nm, array week
Phase size is 600nm, and the width of air slots is 40nm, and length 400nm, the array period size of air slots is 600nm,
Slit location skew granular center position δ=60nm.Substrate is PDMS membrane layer, thickness 500nm.Polarization angle
φ=30 °, 60 ° and 90 °, correspond respectively to realize, the absorption line of dotted line and pecked line.
Fig. 5 is the light absorbs for the graphene array multiband filter that regulation and control are polarized in an optional embodiment of the invention
Figure.Graphene array thickness degree is 1nm, and graphene particles are cylindrical structural, a diameter of 400nm, thickness 1nm, array week
Phase size is 600nm, and the width of air slots is 10nm, and length 400nm, the array period size of air slots is 600nm,
Slit location skew granular center position δ=60nm.Substrate is poly- silica coating, thickness 500nm.
Marked in figure：1st, graphene particles, 2, air slots, 3, substrate.
Embodiment
Technical scheme is described further with reference to embodiment, but is not limited thereto, it is every to this
Inventive technique scheme is modified or equivalent substitution, without departing from the spirit and scope of technical solution of the present invention, all should cover
In protection scope of the present invention.
As shown in figure 1, it is a kind of polarize regulation and control graphene array multiband filter, set gradually from bottom to top substrate 3,
Graphene array structure sheaf, the graphene array structure sheaf are made up of graphene particles 1 and air slots 2；The graphene
Array structure layer is made up of graphene particles and the cyclic array of air slots composite construction.The air slots are in graphene
Cut on grain structure and the position of slit offsets granular center position, formation is spatially separating and the particle of Broken Symmetry
To structure.The present invention breaks electricity of the scarce particle to structure based on forceful electric power magnetic resonance effect possessed by graphene particles and title property
Magnetic resonance couples with hydridization, by the change of the polarization state of incident light, realizes the regulatable multiband filter response of spectrum.This hair
It is bright to be based on forceful electric power magnetic resonance effect possessed by graphene particles, as shown in fig.2, being realized by introducing air slots to graphite
Alkene particle carries out the position skew granular center position of the cutting in structure and slit, is formed and is spatially separating and Broken Symmetry
Particle is to structure.By the electric field resonance direction angle selected counterclockwise vertical with slit for adjusting incident ray polarized light
As polarization state angle or polarization angle φ, realize the spectral response characteristic of the wave filter of this invention of artificial adjustment.Graphene
Grain is cylindrical structural, and array arranges to be square.
Aforesaid substrate 3 can be selected but be not limited to the hard such as glass, or the flexible substrate such as plastics, polymer, for supporting stone
Black alkene array.
As one of preferred embodiment, foregoing graphites alkene particle 1 is arranged and formed by cylindrical graphite alkene resonating member
Periodic lattice structure.
Technical scheme is described in detail with reference to some preferred embodiments and relevant drawings：
Embodiment 1：It is the light that the present embodiment polarizes the graphene array multiband filter regulated and controled shown in Fig. 3 refering to Fig. 3
Absorb figure.Graphene array thickness degree is 1nm, and graphene particles are cylindrical structural, a diameter of 400nm, thickness 1nm, battle array
Row cycle size is 600nm, and the width of air slots is 40nm, length 400nm, and the array period size of air slots is
600nm, slit location skew granular center position δ=60nm.Substrate is PDMS membrane layer, thickness 500nm.Partially
Shake angle φ=0 ° and 45 °, corresponds respectively to realize the absorption line with dotted line.It can be drawn from figure, residing for wave filter
When the polarization angle of incident light is φ=0 °, there are three absworption peaks in infrared frequency range in.It is at 10.512 microns in wavelength
The absorption-type filter effect of first frequency band is presented, absorptivity has reached 0.437.It is to be presented at 12.042 microns in wavelength
The absworption peak of second frequency band, absorptivity 0.452.It is the absorption that the 3rd frequency band is presented at 13.148 microns in wavelength
Peak, absorptivity 0.460.When by changing polarization angle being φ=45 °, the absorption spectrum of wave filter generates obvious change
Change, three absworption peaks originally become for four absworption peaks.Absorbed in original polarization angle by three presented during φ=0 °
The spectra vicinity at peak has the peak that three absorptivities are weakened.When polarization angle is φ=45 °, wave filter is respectively to be in wavelength
It is 0.218 that absorptivity corresponding to strong spectral absorption is generated at 10.319 microns, 11.863 microns and 12.918 microns,
0.188 and 0.238.In addition 16.408 microns, the new absworption peak that a spectral absorption is 0.207 is generated.This shows, passes through
Polarization angle is adjusted, can be carried out from spectral position, spectral intensity to what this was invented based on graphene array multiband filter
Artificial adjustment.
Embodiment 2：Refering to the light absorbs for the graphene array multiband filter for shown in Fig. 4 being the present embodiment polarization regulation and control
Figure.Graphene array thickness degree is 1nm, and graphene particles are cylindrical structural, a diameter of 400nm, thickness 1nm, array week
Phase size is 600nm, and the width of air slots is 40nm, and length 400nm, the array period size of air slots is 600nm,
Slit location skew granular center position δ=60nm.Substrate is polystyrene film layer, thickness 500nm.Polarization angle φ=
30 °, 60 ° and 90 °, correspond respectively to the absorption line of realization, dotted line and pecked line.It is φ=30 ° by changing polarization angle
When, the absorption spectrum of wave filter generates four absworption peaks.Wave filter is 10.320 microns, 11.878 microns respectively in wavelength
With 12.918 microns at generate absorptivity corresponding to strong spectral absorption as 0.322,0.282 and 0.353.In addition 16.380 is micro-
Rice, generate the new absworption peak that a spectral absorption is 0.103.When polarization angle is φ=60 °, the absorption spectrum of wave filter
Generate four absworption peaks.Wave filter is respectively to be produced at wavelength is 10.331 micron, 11.878 microns and 12.918 microns
Absorptivity corresponding to strong spectral absorption is 0.113,0.097 and 0.122.In addition 16.380 microns, a spectrum is generated
Absorptivity is 0.311 new absworption peak.When polarization angle is φ=90 °, the absorption spectrum of wave filter only produces one substantially
Absworption peak.In 16.408 microns of wavelength, the absworption peak that a spectral absorption is 0.415 is generated.This shows, passes through regulation
Polarization angle, it can be carried out effectively based on graphene array multiband filter to what this was invented from spectral position, spectral intensity
Artificial adjustment.
Embodiment 3：It is the light that the present embodiment polarizes the graphene array multiband filter regulated and controled shown in Fig. 5 refering to Fig. 5
Absorb figure.Graphene array thickness degree is 1nm, and graphene particles are cylindrical structural, a diameter of 400nm, thickness 1nm, battle array
Row cycle size is 600nm, and the width of air slots is 30nm, length 400nm, and the array period size of air slots is
600nm, slit location skew granular center position δ=50nm.Substrate is poly- silica coating, thickness 500nm.From figure
It can be found that when the polarization angle of incident light residing for wave filter is φ=0 °, there are three absworption peaks in infrared frequency range in.
It is the absorption-type filter effect that first frequency band is presented at 10.420 microns in wavelength, absorptivity has reached 0.446.In wavelength
To present the absworption peak of second frequency band, absorptivity 0.440 at 11.849 microns.It is to be presented at 13.130 microns in wavelength
The absworption peak of 3rd frequency band, absorptivity 0.465.When by changing polarization angle being φ=45 °, the absorption light of wave filter
Spectrum generates obvious change, and three absworption peaks originally become for four absworption peaks.When original polarization angle is φ=0 °
The spectra vicinity of three absworption peaks presented has the peak that three absorptivities are weakened.When polarization angle is φ=45 °, wave filter
It is to generate to absorb corresponding to strong spectral absorption at 10.420 microns, 11.849 microns and 13.130 microns respectively in wavelength
Rate is 0.233,0.223 and 0.236.In addition 16.241 microns, the new absworption peak that a spectral absorption is 0.205 is generated.
This shows, by adjusting polarization angle, structural parameters, can from spectral position, spectral intensity to this invent based on graphene
Array multiband filter carries out artificial adjustment.
Claims (5)
1. a kind of graphene array multiband filter for polarizing regulation and control, it includes substrate and graphene array structure sheaf, and it is special
Sign is：It is made up of successively substrate and graphene array structure sheaf from bottom to top, the graphene array structure sheaf is by graphene
The cyclic array of particle and air slots composite construction forms；The air slots are cut in graphene particles structure
And the position skew granular center position of slit, formation is spatially separating and the particle of Broken Symmetry is to structure.
2. the graphene array multiband filter of polarization regulation and control according to claim 1, it is characterised in that：The graphite
The cyclic array pattern of alkene particle composition is arranged on substrate top surface.
3. the graphene array multiband filter of polarization regulation and control according to claim 1, it is characterised in that：The graphite
Alkene particle is made up of to structure graphene particles and air slots composite construction.
4. the graphene array multiband filter of polarization regulation and control according to claim 1, it is characterised in that：The graphite
Alkene array is tetragonal lattice.
5. the graphene array multiband filter of polarization regulation and control according to claim 1, it is characterised in that：The substrate
Material be glass or flexible material.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541820A (en) * | 2018-12-27 | 2019-03-29 | 哈尔滨工业大学 | Tunable circular polarisation filter based on automatically controlled graphene |
| CN110687622A (en) * | 2019-10-14 | 2020-01-14 | 江西师范大学 | Polarization-adjustable spectrum dual-difference-response perfect optical wave absorber and preparation method thereof |
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| WO2014152509A1 (en) * | 2013-03-15 | 2014-09-25 | Solan, LLC | Plasmonic device enhancements |
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| CN110687622A (en) * | 2019-10-14 | 2020-01-14 | 江西师范大学 | Polarization-adjustable spectrum dual-difference-response perfect optical wave absorber and preparation method thereof |
| CN110687622B (en) * | 2019-10-14 | 2022-06-14 | 江西师范大学 | Polarization-adjustable spectrum dual-difference-response perfect optical wave absorber and preparation method thereof |
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