CN102778725A - Single-channel tunable filter in visible band based on one-dimensional photonic crystals - Google Patents
Single-channel tunable filter in visible band based on one-dimensional photonic crystals Download PDFInfo
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- CN102778725A CN102778725A CN2012102837914A CN201210283791A CN102778725A CN 102778725 A CN102778725 A CN 102778725A CN 2012102837914 A CN2012102837914 A CN 2012102837914A CN 201210283791 A CN201210283791 A CN 201210283791A CN 102778725 A CN102778725 A CN 102778725A
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Abstract
The invention discloses a single-channel tunable filter in a visible band based on one-dimensional photonic crystals. The filter consists of the two parallel and structurally identical one-dimensional photonic crystals D1 and D2 of [A/B]3 and a thickness-adjustable air defect layer C arranged between the two one-dimensional photonic crystals, wherein at least one of the one-dimensional photonic crystals can be moved so as to adjust the thickness d3 of the air defect layer C, so that a filtering channel of the filter changes in position along with the thickness so as to form the tunable filter. The filter disclosed by the invention has a simple structure, various dielectric materials can be combined together according to different thickness ratios so as to be applied to the filter, and the filter can be used flexibly and simply, has a good filtering characteristic and excellent application prospect in the field of optical communications.
Description
Technical field
The present invention relates to a kind of photon crystal filter, particularly relate to a kind of tunable photon crystal filter.
Background technology
Along with the continuous development of optical communication technique, need the continuous increase of transmission quantity of information, people improve constantly the requirement of communication network.Following optical communication network will be towards the development of intelligent, flexible and configurable aspect, is the important devices of this trend of realization and possess big tuning range, ultra arrowband, covering total visible light scope, tunable wave filter.The tunable optic filter that now has been applied mainly comprises Fabry-Perot tunable optic filter, Fiber Bragg Grating tunable optic filter and Waveguide array formula tunable optic filter etc.; But the narrower and broader bandwidth of coordination scope of these adjustable filters, energy consumption is bigger.
Photonic crystal is the artificial lens that is formed according to periodic arrangement by the different medium of specific inductive capacity.Photonic crystal mainly is divided into 1-D photon crystal, 2 D photon crystal and three-D photon crystal, and for the two and three dimensions photonic crystal, 1-D photon crystal has simple in structure, advantage such as realization more easily on the prepared.The proposition that photonic crystal is theoretical is for the design optical component provides a kind of new method.Photon crystal tunable filter mainly utilizes thermo-optic effect, photon-induced refractive index variation and photoelectric effect that the optical parameter of material is changed now, realizes tunable filtering.The photon crystal filter tuning range of utilizing thermo-optic effect and photon-induced refractive index to change is less usually; Use photoelectric wave filter can obtain relatively large tuning amount, but still less than 100nm, and driving time is longer.
Mao Huibing etc. (theoretical research of photon crystal tunable filtering characteristic, Acta Physica Sinica, 2004 the 53rd volumes) propose (H
1L
1)
15LcH
2(L
2H
2)
nStructural model, coupling layer Lc is an air layer, regulates the thickness of coupling layer through surface micro technology and realizes tuning purpose.This photon crystal structure is complicated, and the forbidden band is not at visible-range, and the width of conduction band reaches tens nanometers, can not realize ultra narrow-band filtering.
Y. (Optical Fabry – Perot filter based on photonic band gap quasi-periodic one-dimensional multilayer according to the definite Rudin – Shapiro distribution such as Bouazzi; Optics Communications.2012; Vol:285 2774-2779) has studied quasi-periodic structure and H (LH) with Shandong fourth. Xia Piluo sequence
JPeriodic structure and the forbidden band characteristic when putting are found to occur many conduction bands at 400nm to the forbidden band scope of 700nm.Though this structural model can be implemented in the polychrome wave filter conception in the visible-range, fail to cover fully visible-range, and can not realize tuning function.
(Optimization of dichromatic filters based on photonic heterostructures of Si/MgF such as Han Peide
2, Optics Communications. 2012, Vol:285 2656-2659) has proposed employing Si and MgF
2Two kinds of dielectric materials according to structure [(AB)
m(CD)
s]
q(AB)
m(wherein A, C represent Si, and B, D represent MgF
2) arrange the formation 1-D photon crystal, realize reverberator and wave filter in the visible-range through the value that changes m, s, q, but this theoretical model there is the forbidden band to fail to cover total visible light scope and the non-tunable limitation of conduction band.
Summary of the invention
The visible light wave range single channel tunable optic filter that the purpose of this invention is to provide a kind of simple possible based on 1-D photon crystal.
Visible light wave range single channel tunable optic filter based on 1-D photon crystal of the present invention is to become [A/B] by two structural group that laterally arrange
3Identical 1-D photon crystal D
1, D
2, and the air defect layer C that can regulate of the thickness between said two 1-D photon crystals constitutes, wherein at least one 1-D photon crystal can move, to regulate the thickness of air defect layer C
d 3The one-piece construction of tunable optic filter of the present invention is [A/B]
3C [A/B]
3
The principle that the present invention is based on is: in photonic crystal; If its structural parameters are optimized; Can find in some frequency range, bigger complete forbidden photon band can occur; And when in photonic crystal, introducing specific defect layer, the defect state of the higher quality factor will occur in the forbidden photon band fully and form the defective mould, the effect that the complete forbidden photon band of photonic crystal and the defective mould in the forbidden band fully can be realized forbidding and allow the photon of certain frequency to pass through.Through changing the parameters of defect layer, can control the position of conduction band, thereby realize the purpose of tunable filtering.
The present invention drives 1-D photon crystal D with ultrasonic motor
1Or D
2Move, regulate the thickness of air defect layer C
d 3.A kind of typical structure is: with photonic crystal D
1Be fixed on the stationary installation D
2Be fixed on one with movable fixture that ultrasonic motor links to each other on, drive D through ultrasonic motor
2Move along track, to regulate the thickness of air defect layer C
d 3, then the filtering channel position of wave filter can change thereupon, forms tunable optic filter.
Wherein, the thickness of said air defect layer C
d 30.3
a～1.5
aBetween change, wherein
aBe 1-D photon crystal D
1Or D
2Grating constant.
The photonic crystal [A/B] of said formation tunable optic filter of the present invention
3Two kinds of dielectric materials by high and low specific inductive capacity are formed, and A is advanced low-k materials such as lithium fluoride or magnesium fluoride, and thickness does
d 1B is high dielectric constant material such as gallium antimonide or germanium, and thickness does
d 2
To grating constant
a=
d 1+
d 2The 1-D photon crystal visible light wave range single channel tunable optic filter of=126.0nm carries out numerical simulation calculation, and the result shows: along with the distance between two 1-D photon crystals is the thickness of air defect layer
d 30.3
a～1.5
aBetween when changing, significant change does not take place in the width of forbidden photon band, can cover the total visible light scope all the time; And in the forbidden photon band scope, occur a ultra narrow filtering channel all the time, this channel wavelength moves at visible light wave range along with the increase of defect layer thickness continuously, and width changes between 1.2nm～3.4nm, and transmissivity can reach 99.9%, and filter effect is good.
1-D photon crystal among the present invention [A/B]
3Adopting magnetron sputtering or low-pressure vapor phase chemical deposition mode to process obtains.And then; The concrete preparation method of 1-D photon crystal visible light wave range single channel tunable optic filter of the present invention is: at first adopt methods such as magnetron sputtering, low-pressure vapor phase chemogenic deposit; The dielectric material B and the A of design thickness successively grow on optical base-substrate; After the same method long 3 cycles of symbiosis, obtain photonic crystal D
1Repeat aforesaid operations and prepare identical photonic crystal D
2With photonic crystal D
1Be fixed on the stationary installation F D
2Be fixed on the movable fixture M that links to each other with ultrasonic motor (USM).Move along track when driving M, to regulate the thickness of air defect layer C through USM
d 3The time, the filtering channel position of wave filter can change thereupon, forms tunable optic filter.
1-D photon crystal visible light wave range single channel tunable optic filter of the present invention is with respect to the advantage of prior art:
1, simple in structure, this tunable optic filter in fact only is identically to have only the 1-D photon crystal in three cycles to constitute by two, on the prepared cost low, realize more easily;
2, obtain easily, can multiple dielectric material be applied to the present invention according to different thickness after making up, be prone to row flexibly, and greatly reduce the experiment difficulty;
3, can be tuning, regulate the distance between two 1-D photon crystals through ultrasonic motor, just can obtain the passage of required wavelength;
4, filtering performance is good; The forbidden band can cover the total visible light scope always in the tuning process; In its forbidden band scope, have only extremely narrow, a wavelength continually varying filtering channel all the time, this makes tunable optic filter of the present invention have good application prospects in the optical communication field.
Description of drawings
Fig. 1 is the photonic crystal D that constitutes 1-D photon crystal visible light wave range single channel tunable optic filter of the present invention
1, D
2Structural representation.
Among the figure: A, B are two kinds of different dielectric materials, [A/B]
3Expression A, two kinds of different dielectric materials of B are arranged in order 3 cycles, wherein
d 1Be the thickness of dielectric material A,
d 2Be the thickness of dielectric material B,
a=
d 1 + d 2Be the grating constant of photonic crystal,
zDirection is the periodic arrangement direction of photonic crystal.
Fig. 2 is the structural representation that constitutes 1-D photon crystal visible light wave range single channel tunable optic filter of the present invention.
Among the figure: A is an advanced low-k materials, and B is a high dielectric constant material, and C is the air defect layer,
d 1Be the thickness of dielectric material A,
d 2Be the thickness of dielectric material B,
a=
d 1 + d 2Be the grating constant of photonic crystal,
d 3For the thickness of air defect layer C, 0.3
a～1.5
aBetween change;
zDirection is the periodic arrangement direction of photonic crystal.
Fig. 3 is the structure drawing of device of 1-D photon crystal visible light wave range single channel tunable optic filter of the present invention.
Among the figure: D
1, D
2For constituting two identical 1-D photon crystals of 1-D photon crystal visible light wave range single channel tunable optic filter of the present invention; F is a stationary installation, D
1Be fixed on the F; M is the movable fixture that links to each other with ultrasonic motor, D
2Be fixed on the M; USM is a ultrasonic motor, and USM drives M and moves along track.
Fig. 4 becomes [LiF/GaSb] for structural group
3[air] [LiF/GaSb]
3Tunable optic filter exist
d 3=0.3
ɑThe time transmission characteristics figure.
Among the figure: ordinate is a transmissivity, and horizontal ordinate is a wavelength, the nm of unit.Forbidden band wavelength coverage 379.1nm～833.3nm, conduction band wavelength coverage 417.2nm～419.4nm, width 2.2nm, transmissivity 98.8% in the 418.3nm position.
Fig. 5 becomes [LiF/GaSb] for structural group
3[air] [LiF/GaSb]
3Tunable optic filter exist
d 3=0.5
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 376.3nm～846.8m, conduction band wavelength coverage 448.7nm～450.0nm, width 1.3nm, transmissivity 72.3% in the 449.4nm position.
Fig. 6 becomes [LiF/GaSb] for structural group
3[air] [LiF/GaSb]
3Tunable optic filter exist
d 3=0.7
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 376.3nm～856.0nm, conduction band wavelength coverage 480.2nm～481.7nm, width 1.5nm, transmissivity 74.4% in the 480.9nm position.
Fig. 7 becomes [LiF/GaSb] for structural group
3[air] [LiF/GaSb]
3Tunable optic filter exist
d 3=0.9
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 377.2 nm～865.4nm, conduction band wavelength coverage 512.2nm～510.5nm, width 1.7nm, transmissivity 97.5% in the 511.4nm position.
Fig. 8 becomes [LiF/GaSb] for structural group
3[air] [LiF/GaSb]
3Tunable optic filter exist
d 3=1.1
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 387.6nm～870.2nm, conduction band wavelength coverage 540.3nm～542.2nm, width 1.9nm, transmissivity 68.6% in the 541.2nm position.
Fig. 9 becomes [LiF/GaSb] for structural group
3[air] [LiF/GaSb]
3Tunable optic filter exist
d 3=1.3
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 382.7nm～875.0nm, conduction band wavelength coverage 570.7nm～572.7nm, width 2.0nm, transmissivity 23.3% in the 571.7nm position.
Figure 10 becomes [LiF/GaSb] for structural group
3[air] [LiF/GaSb]
3Tunable optic filter exist
d 3=1.5
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 389.9nm～877.4nm, conduction band wavelength coverage 600.0nm～602.3nm, width 2.3nm, transmissivity 98.9% in the 601.1nm position.
Figure 11 becomes [LiF/Ge] for structural group
3[air] [LiF/Ge]
3Tunable optic filter exist
d 3=0.3
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 391.3nm～787.5nm, conduction band wavelength coverage 418.3nm～420.6nm, width 2.3nm, transmissivity 99.4% in the 419.4nm position.
Figure 12 becomes [LiF/Ge] for structural group
3[air] [LiF/Ge]
3Tunable optic filter exist
d 3=0.5
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 385.6nm～803.6nm, conduction band wavelength coverage 446.8nm～448.1nm, width 1.3nm, transmissivity 91.5% in the 447.4nm position.
Figure 13 becomes [LiF/Ge] for structural group
3[air] [LiF/Ge]
3Tunable optic filter exist
d 3=0.7
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 385.1nm～813.9nm, conduction band wavelength coverage 475.1nm～476.6nm, width 1.5nm, transmissivity 73.7% in the 475.8nm position.
Figure 14 becomes [LiF/Ge] for structural group
3[air] [LiF/Ge]
3Tunable optic filter exist
d 3=0.9
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 386.0nm～822.5nm, conduction band wavelength coverage 504.0nm～505.6nm, width 1.6nm, transmissivity 63.3% in the 504.8nm position.
Figure 15 becomes [LiF/Ge] for structural group
3[air] [LiF/Ge]
3Tunable optic filter exist
d 3=1.1
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 385.6nm～822.5nm, conduction band wavelength coverage 532.1nm～533.9nm, width 1.8nm, transmissivity 93.4% in the 533.0nm position.
Figure 16 becomes [LiF/Ge] for structural group
3[air] [LiF/Ge]
3Tunable optic filter exist
d 3=1.3
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 389.9nm～828.9nm, conduction band wavelength coverage 560.5nm～562.5nm, width 2.0nm, transmissivity 94.3% in the 561.5nm position.
Figure 17 becomes [LiF/Ge] for structural group
3[air] [LiF/Ge]
3Tunable optic filter exist
d 3=1.5
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 398.2nm～833.3nm, conduction band wavelength coverage 588.8nm～591.0nm, width 2.2nm, transmissivity 82.0% in the 589.9nm position.
Figure 18 becomes [MgF for structural group
2/ Ge]
3[air] [MgF
2/ Ge]
3Tunable optic filter exist
d 3=0.3
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 373.2nm～764.6nm, conduction band wavelength coverage 407.0nm～409.1nm, width 2.1nm, transmissivity 99.9% in the 408.0nm position.
Figure 19 becomes [MgF for structural group
2/ Ge]
3[air] [MgF
2/ Ge]
3Tunable optic filter exist
d 3=0.5
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 368.9nm～777.8nm, conduction band wavelength coverage 436.9nm～438.1nm, width 1.2nm, transmissivity 79.8% in the 437.5nm position.
Figure 20 becomes [MgF for structural group
2/ Ge]
3[air] [MgF
2/ Ge]
3Tunable optic filter exist
d 3=0.7
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 368.9nm～787.5nm, conduction band wavelength coverage 446.7nm～468.1nm, width 1.4nm, transmissivity 57.3% in the 467.4nm position.
Figure 21 becomes [MgF for structural group
2/ Ge]
3[air] [MgF
2/ Ge]
3Tunable optic filter exist
d 3=0.9
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 370.2nm～795.5nm, conduction band wavelength coverage 496.1nm～497.6nm, width 1.5nm, transmissivity 71.1% in the 496.9nm position.
Figure 22 becomes [MgF for structural group
2/ Ge]
3[air] [MgF
2/ Ge]
3Tunable optic filter exist
d 3=1.1
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 371.5nm～797.5nm, conduction band wavelength coverage 525.0nm～526.8nm, width 1.8nm, transmissivity 89.7% in the 525.9nm position.
Figure 23 becomes [MgF for structural group
2/ Ge]
3[air] [MgF
2/ Ge]
3Tunable optic filter exist
d 3=1.3
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 376.3nm～803.6nm, conduction band wavelength coverage 553.6nm～555.6nm, width 2.0nm, transmissivity 81.6% in the 554.6nm position.
Figure 24 becomes [MgF for structural group
2/ Ge]
3[air] [MgF
2/ Ge]
3Tunable optic filter exist
d 3=1.5
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 384.1nm～803.6nm, conduction band wavelength coverage 582.3nm～584.4nm, width 2.1nm, transmissivity 97.2% in the 583.3nm position.
Figure 25 becomes [MgF for structural group
2/ GaSb]
3[air] [MgF
2/ GaSb]
3Tunable optic filter exist
d 3=0.3
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 362.5nm～803.6nm, conduction band wavelength coverage 407.5nm～409.1nm, width 1.6nm, transmissivity 67.6% in the 408.6nm position.
Figure 26 becomes [MgF for structural group
2/ GaSb]
3[air] [MgF
2/ GaSb]
3Tunable optic filter exist
d 3=0.5
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 360.8nm～816.1nm, conduction band wavelength coverage 440.6m～441.8nm, width 1.2nm, transmissivity 95.9% in the 441.2nm position.
Figure 27 becomes [MgF for structural group
2/ GaSb]
3[air] [MgF
2/ GaSb]
3Tunable optic filter exist
d 3=0.7
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 361.2nm～826.8nm, conduction band wavelength coverage 472.3nm～473.7nm, width 1.4nm, transmissivity 29.6% in the 473.0nm position.
Figure 28 becomes [MgF for structural group
2/ GaSb]
3[air] [MgF
2/ GaSb]
3Tunable optic filter exist
d 3=0.9
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 362.5nm～833.3nm, conduction band wavelength coverage 503.2nm～504.8nm, width 1.6nm, transmissivity 45.4% in the 504.0nm position.
Figure 29 becomes [MgF for structural group
2/ GaSb]
3[air] [MgF
2/ GaSb]
3Tunable optic filter exist
d 3=1.1
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 364.2nm～837.8nm, conduction band wavelength coverage 533.0nm～535.7nm, width 2.7nm, transmissivity 16.9% in the 534.8nm position.
Figure 30 becomes [MgF for structural group
2/ GaSb]
3[air] [MgF
2/ GaSb]
3Tunable optic filter exist
d 3=1.3
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 368.9nm～842.2nm, conduction band wavelength coverage 563.5nm～565.5nm, width 2.0nm, transmissivity 33.9% in the 564.5nm position.
Figure 31 becomes [MgF for structural group
2/ GaSb]
3[air] [MgF
2/ GaSb]
3Tunable optic filter exist
d 3=1.5
ɑThe time transmission characteristics figure.
Among the figure: forbidden band wavelength coverage 377.7nm～846.8nm, conduction band wavelength coverage 592.1nm～595.5nm, width 3.4nm, transmissivity 25.9% in the 594.3nm position.
Embodiment
Embodiment 1
Two kinds of dielectric materials that present embodiment is selected for use are respectively lithium fluoride (specific inductive capacity 1.96) and gallium antimonide (specific inductive capacity 20.25), according to [LiF/GaSb]
3Structural arrangement form 1-D photon crystal.Lithium fluoride thickness wherein
d 1=0.78
ɑ=98.3nm, gallium antimonide thickness
d 2=0.22
ɑ=27.7nm, grating constant
ɑ=126.0nm.
Adopt model be the full-automatic magnetron sputtering coater of MSP-3200C on optical base-substrate with film plating process alternating growth lithium fluoride, gallium antimonide, totally 6 layers.6 layers of gallium antimonide of plated film growth regulation on optical base-substrate at first; Its thickness is 27.7nm; The plated film growth thickness is the 5th layer of lithium fluoride of 98.3nm on the 6th layer of gallium antimonide then; Obtain the one-period of photonic crystal, adopt 2 all after dates of regrowth that use the same method then, obtain [LiF/Ge] in three cycles
3Layer promptly constitutes the 1-D photon crystal D of tunable optic filter
1Continue to adopt identical preparation method to prepare identical photonic crystal D
2With photonic crystal D
1Be fixed on the stationary installation F D
2Be fixed on the movable fixture M that links to each other with ultrasonic motor (USM); Driving M through USM moves along track; Thereby regulate two distances between the photonic crystal, just prepare a kind of visible light wave range single channel tunable optic filter shown in Figure 2 based on 1-D photon crystal.
Thickness as air layer C
d 3=0.3
ɑThe time, like Fig. 4, forbidden band wavelength coverage 379.1nm～833.3nm, conduction band wavelength coverage 417.2nm～419.4nm, width 2.2nm, transmissivity 98.8% in the 418.3nm position;
d 3=0.5
ɑThe time, like Fig. 5, forbidden band wavelength coverage 376.3nm～846.8m, conduction band wavelength coverage 448.7nm～450.0nm, width 1.3nm, transmissivity 72.3% in the 449.4nm position;
d 3=0.7
ɑThe time, like Fig. 6, forbidden band wavelength coverage 376.3nm～856.0nm, conduction band wavelength coverage 480.2nm～481.7nm, width 1.5nm, transmissivity 74.4% in the 480.9nm position;
d 3=0.9
ɑThe time, like Fig. 7, forbidden band wavelength coverage 377.2 nm～865.4nm, conduction band wavelength coverage 512.2nm～510.5nm, width 1.7nm, transmissivity 97.5% in the 511.4nm position;
d 3=1.1
ɑThe time, like Fig. 8, forbidden band wavelength coverage 387.6nm～870.2nm, conduction band wavelength coverage 540.3nm～542.2nm, width 1.9nm, transmissivity 68.6% in the 541.2nm position;
d 3=1.3
ɑThe time, like Fig. 9, forbidden band wavelength coverage 382.7 nm～875.0nm, conduction band wavelength coverage 570.7nm～572.7nm, width 2.0nm is in 571.7 position transmissivities 23.3%;
d 3=1.5
ɑThe time, like Figure 10, forbidden band wavelength coverage 389.9nm～877.4nm, conduction band wavelength coverage 600.0nm～602.3nm, width 2.3nm, transmissivity 98.9% in the 601.1nm position.
Can find out from above-mentioned data: along with
d 3Increase, it is big that energy gap becomes, and can cover the total visible light scope all the time, move between 417.2nm～602.3nm continuously the position of passage, width changes between 1.3nm～2.3nm.
Two kinds of dielectric materials that present embodiment is selected for use are respectively lithium fluoride (specific inductive capacity 1.96) and germanium (specific inductive capacity 16.00), according to [LiF/Ge]
3Structural arrangement form 1-D photon crystal.Lithium fluoride thickness wherein
d 1=0.74
ɑ=93.2nm, germanium thickness
d 2=0.26
ɑ=32.8m, grating constant
ɑ=126.0nm.
The preparation method of 1-D photon crystal visible light wave range single channel tunable optic filter is with embodiment 1.
Thickness as air layer C
d 30.3
a～1.5
aWhen changing in the scope, the transmission characteristics figure of tunable optic filter such as Figure 11～shown in Figure 17, energy gap can along with
d 3Increase and broaden, cover the total visible light scope all the time, move between 418.3nm～591.0nm continuously the position of passage, width changes between 1.3nm～2.2nm.
Embodiment 3
Two kinds of dielectric materials that present embodiment is selected for use are respectively magnesium fluoride (specific inductive capacity 1.38) and germanium (specific inductive capacity 16.00), according to [MgF
2/ Ge]
3Structural arrangement form 1-D photon crystal.Lithium fluoride thickness wherein
d 1=0.76
ɑ=95.8nm, germanium thickness
d 2=0.24
ɑ=30.2nm, grating constant
ɑ=126.0nm.
The preparation method of 1-D photon crystal visible light wave range single channel tunable optic filter is with embodiment 1.
Thickness as air layer C
d 30.3
a～1.5
aWhen changing in the scope, the transmission characteristics figure of tunable optic filter such as Figure 18～shown in Figure 24, energy gap can along with
d 3Increase and broaden, cover the total visible light scope all the time, move between 407.0nm～584.4nm continuously the position of passage, width changes between 1.2nm～2.1nm.
Two kinds of dielectric materials that present embodiment is selected for use are respectively magnesium fluoride (specific inductive capacity 1.38) and gallium antimonide (specific inductive capacity 20.25), according to [MgF
2/ GaSb]
3Structural arrangement form 1-D photon crystal.Lithium fluoride thickness wherein
d 1=0.80
ɑ=100.8nm, gallium antimonide thickness
d 2=0.20
ɑ=25.2nm, grating constant
ɑ=126.0nm.
The preparation method of 1-D photon crystal visible light wave range single channel tunable optic filter is with embodiment 1.
Thickness as air layer C
d 30.3
a～1.5
aWhen changing in the scope, the transmission characteristics figure of tunable optic filter such as Figure 25～shown in Figure 31, energy gap can along with
d 3Increase and broaden, cover the total visible light scope all the time, move between 407.5nm～595.5nm continuously the position of passage, width changes between 1.2nm～3.4nm.
Claims (5)
1. the visible light wave range single channel tunable optic filter based on 1-D photon crystal is characterized in that becoming [A/B] by two structural group that laterally arrange
3Identical 1-D photon crystal D
1, D
2, and the formation of the adjustable air defect layer of the thickness C between said two 1-D photon crystals, wherein at least one 1-D photon crystal can move, to regulate the thickness of air defect layer C
d 3
2. single channel tunable optic filter according to claim 1 is characterized in that driving 1-D photon crystal D with ultrasonic motor
1Or D
2Move, regulate the thickness of air defect layer C
d 3
3. single channel tunable optic filter according to claim 1 is characterized in that the thickness of said air defect layer C
d 30.3
a～1.5
aBetween change, wherein
aBe 1-D photon crystal D
1Or D
2Grating constant.
4. single channel tunable optic filter according to claim 1 is characterized in that described 1-D photon crystal [A/B]
3In, A is advanced low-k materials lithium fluoride or magnesium fluoride, B is high dielectric constant material gallium antimonide or germanium.
5. single channel tunable optic filter according to claim 1 is characterized in that described 1-D photon crystal [A/B]
3Adopting magnetron sputtering or low-pressure vapor phase chemical deposition mode to process obtains.
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| CN104762664A (en) * | 2015-04-13 | 2015-07-08 | 电子科技大学 | Method for forming photonic crystal through adoption of sound wave |
| CN106371171A (en) * | 2016-11-21 | 2017-02-01 | 太原理工大学 | Mirror symmetry photonic crystal filter based on air defects |
| CN113156671A (en) * | 2021-04-25 | 2021-07-23 | 南京邮电大学 | Fully-tunable acousto-optic filter device and acousto-optic filter tuning method |
| CN113219558A (en) * | 2021-05-14 | 2021-08-06 | 南京邮电大学 | Method and device for realizing optical isolation by using high-dielectric-constant composite material |
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| CN104155711A (en) * | 2014-07-29 | 2014-11-19 | 太原理工大学 | Tunable photonic crystal filter for optical network OPM module |
| CN104155711B (en) * | 2014-07-29 | 2016-09-21 | 太原理工大学 | Tunable photonic crystal wave filter for optical-fiber network OPM module |
| CN104762664A (en) * | 2015-04-13 | 2015-07-08 | 电子科技大学 | Method for forming photonic crystal through adoption of sound wave |
| CN106371171A (en) * | 2016-11-21 | 2017-02-01 | 太原理工大学 | Mirror symmetry photonic crystal filter based on air defects |
| CN113156671A (en) * | 2021-04-25 | 2021-07-23 | 南京邮电大学 | Fully-tunable acousto-optic filter device and acousto-optic filter tuning method |
| CN113219558A (en) * | 2021-05-14 | 2021-08-06 | 南京邮电大学 | Method and device for realizing optical isolation by using high-dielectric-constant composite material |
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