CN102520480A - Multi-medium-coupling three-dimensional photonic crystal and method for designing and manufacturing multi-medium-coupling three-dimensional photonic crystal - Google Patents
Multi-medium-coupling three-dimensional photonic crystal and method for designing and manufacturing multi-medium-coupling three-dimensional photonic crystal Download PDFInfo
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- CN102520480A CN102520480A CN2011104062056A CN201110406205A CN102520480A CN 102520480 A CN102520480 A CN 102520480A CN 2011104062056 A CN2011104062056 A CN 2011104062056A CN 201110406205 A CN201110406205 A CN 201110406205A CN 102520480 A CN102520480 A CN 102520480A
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Abstract
The invention discloses a multi-medium-coupling three-dimensional photonic crystal and a method for designing and manufacturing the multi-medium-coupling three-dimensional photonic crystal. The multi-medium-coupling three-dimensional photonic crystal has super-wide band gaps in wider frequency and is easy to manufacture. According to the invention, the multi-medium-coupling three-dimensional photonic crystal disclosed by the invention periodically contains a plurality of dielectric materials with different dielectric constants; the multi-medium-coupling three-dimensional photonic crystal comprises two forms, i.e. periodic cascading and periodic intersection, and is manufactured by adopting a rapid prototyping and a multi-step injection molding method; the multi-medium-coupling three-dimensional photonic crystal disclosed by the invention contains more than two dielectric materials, the Bragg scattering is strengthened due to the dielectric constant ratio (refractive index ratio) among the dielectric materials, therefore, band gaps wider than those of a single-dielectric-material photonic crystal are obtained.
Description
Technical field
The present invention relates to a kind of multimedium coupling three-D photon crystal and design and production method thereof.Specifically be meant the three-D photon crystal that comprises two or more dielectric materials simultaneously.
Background technology
Photonic crystal is meant that specific inductive capacity (or refractive index) is a kind of sandwich of three-dimensional arrangement on three dimensions.Yablornovitch and John independently proposed the notion of photonic crystal when research suppressed atomic spontaneous emission and light local respectively in 1987.Similar with traditional crystalline material, when specific inductive capacity receives when modulating, will demonstrate the band structure similar with the solid-state electronic crystal in three dimensions, the electromagnetic wave that energy is among the band gap can not be propagated in this structure.When the wave frequency of work during in optical band, custom is referred to as photonic crystal or photonic band gap structure.When the wave frequency of work was in the microwave frequency band scope, custom was referred to as electromagnetic bandgap structure.For studying conveniently unified " photonic crystal " this notion of continuing to use.
The most basic characteristic of photonic crystal is forbidden photon band and photon local.In addition, the researchist has also found slow wave and transmission of ultra slow wave and negative refraction at photonic crystal.The various new applications of photonic crystal all are based on these novel peculiar character of photon crystal structure itself.Catoptron, optical waveguide resonant cavity are several basic areas of photonic crystal applications.Because photonic crystal has band gap properties, therefore just can obtain reflectivity near 100% catoptron through appropriate design.Based on the design of catoptron, be easy to just can obtain various high efficiency wave filter (like low-pass filter, Hi-pass filter, BPF., narrow-band filter etc.).From reverberator, utilize the different band gap characteristics of TE and TM polarization in the photonic crystal just can obtain various polarizers.Through in mirror design, introducing appropriate line defect, just can obtain excellent optical waveguide.And, just can obtain the resonator cavity of high-quality-factor through in mirror design, introducing appropriate point defect.Concerning these characteristics that realize photonic crystal, wide more band gap helps in the wideer electromagnetic transmission of scope inner control more.
The band gap of photonic crystal can recently be controlled through changing structure, filling rate and height dielectric.About different three-dimensional structures, many research reports have been arranged like yard structure, diamond lattic structure photonic crystal.And the article of Kirihara etc. " through changing the electromagnetic transmission of periodic Control of electromagnetic crystals " (Solid State Communications; 124 phases; 2002; The 135-139 page or leaf) studied the influence of diamond lattic structure cycle stretching to photonic band gap, essence is to control electro-magnetic bandgap through the filling rate that changes photon crystal structure, has obtained the more photonic crystal of broad-band gap after the stretching.The article of Lv Xuesong etc. " with microwave-medium powder preparation millimeter wave electro-magnetic bandgap crystal " (Joural of American Ceramics Society; 2009 9 phases, 371-378 page or leaf) studied the differing dielectric constant microwave dielectric material separately to the influence of electro-magnetic bandgap.But be based on the restriction of manufacturing technology, more than in these researchs photonic crystal all be only to comprise the height two media material that is situated between, the photonic crystal that comprises two or more dielectric materials simultaneously is research report so far.This is because the complicacy of three-dimensional structure adds that the inconsistency of multiple dielectric material in moulding, drying and sintering process that comprises simultaneously all makes it make very difficulty.
Summary of the invention
The object of the present invention is to provide a kind of multimedium coupling three-D photon crystal and design and production method thereof.
Technical scheme of the present invention is achieved in that
The dielectric material that has periodically comprised multiple differing dielectric constant in the multimedium coupling three-D photon crystal comprises two kinds of forms of cyclical layer superimposition intersection in the said photonic crystal:
Periodically range upon range of multimedium coupling three-D photon crystal is meant: three-dimensional photon crystal structure is equally divided into two parts or more parts; In each part, fill the medium of differing dielectric constant respectively, form the photonic crystal that contains multiple differing dielectric constant medium simultaneously at last;
The multimedium three-D photon crystal that periodically intersects is meant: will have in the photonic crystal of periodicity three-dimensional structure; Ground floor is filled first kind of medium, and the second layer is filled second kind of medium, and the 3rd layer recharges first kind of medium; The 4th layer recharges second kind of medium, by that analogy; Or intersection is filled different medium in each layer; Perhaps the mutually nested filling of two media forms the multimedium photonic crystal.
Said three-dimensional structure comprises the redundant organism of three-dimensional column diamond lattic structure and spherical diamond lattic structure and diamond lattic structure, yard structure.
The used medium material comprises all stupaliths, fluent material and ultralow temperature metal material; The coupling of said multimedium is meant between the stupalith, the medium of multiple differing dielectric constant is coupled separately between the fluent material or between the ultralow temperature metal material, or multiple medium intercouples between stupalith, fluent material and the ultralow temperature metal material.
A kind of manufacturing approach of multimedium coupling three-D photon crystal may further comprise the steps:
At first adopt CAD software to carry out structural design and utilize photocureable rapid shaping to make resin mould according to electromagnetic theory, and preparation ceramic size or fluent material, ultralow temperature metal material;
Secondly, adopt the multistep injection molding to prepare multimedium coupling three-D photon crystal;
Be directed to periodically range upon range of photonic crystal, injection molding is carried out the communication type design with shell, every kind of corresponding structure of dielectric material has a grouting port and a connected entrance, and the height of connected entrance is parallel with the peak of the shared structure of corresponding medium.Behind a kind of dielectric paste injection molding, seal grouting port and connected entrance with plasticine, carry out the injection molding of second kind of medium then, by that analogy, finally obtain the multimedium three-D photon crystal.
To with the photonic crystal of mutually nested structure; Separate with dividing plate by the medium kind in the middle of the superstructure with the injection molding shell; Be used for the injection molding of first kind of medium counter structure on one side, another side is used for the injection molding of second kind of medium counter structure, finally obtains multimedium coupling three-D photon crystal.
The present invention compares with traditional three-D photon crystal, has following characteristics:
1. the photonic crystal among the present invention comprises two or more dielectric materials, and the permittivity ratio between the multiple dielectric material (refractive index ratio) has been strengthened Bragg diffraction, has obtained than the wideer band gap of single dielectric material photonic crystal;
2. adopt the rapid prototyping mould to solve the shaping problem of multimedium coupling photonic crystal, given full play to photocureable rapid shaping in design with the advantage of making, for photonic crystal has been established solid foundation to the device development in conjunction with the multistep injection molding.
Through the description of figs and embodiment, will show characteristic of the present invention more clearly.
Description of drawings
Fig. 1 is three kinds of photon dielectric crystals of the range upon range of diamond lattic structure of periodicity
Fig. 2 periodically intersects three kinds of photon dielectric crystals of diamond lattic structure
Fig. 3 is three kinds of photon dielectric crystals of nested diamond lattic structure periodically
Fig. 4 periodically intersects the multiple photon dielectric crystal of yard structure
Fig. 5 makes the method synoptic diagram of multimedium coupling photonic crystal according to embodiment 1
Fig. 6 makes the method synoptic diagram of multimedium coupling photonic crystal according to embodiment 3
Embodiment
Embodiment 2
Accompanying drawing 2 is periodically to intersect three kinds of photon dielectric crystals of diamond lattic structure.(specific inductive capacity is respectively ε to choose two kinds of suitable dielectric materials
1, ε
2), utilize rapid shaping and multistep gel injection-moulding legal system to be equipped with multimedium coupling photonic crystal.The period 1 layer is that specific inductive capacity is ε in the accompanying drawing 2
1First kind of medium, when first kind of medium be about to solidify toward second round layer inject second kind of medium ε
2, when second kind of medium soon solidifies, inject first kind of medium ε to the period 3 layer
1, when the period 3, layer medium was about to solidify, refill second kind of medium ε to the period 4 layer
2, by that analogy, the periodicity that comprises three kinds of media when can prepare like accompanying drawing 2 is intersected the diamond lattic structure photonic crystal.Prepared multimedium photonic crystal can be the multimedium coupling photonic crystal that comprises resin structure and two media, also can be the pure ceramic photonic crystal that comprises two kinds of potteries and air after super-dry, degreasing and sintering processes.
Accompanying drawing 3 is three kinds of photon dielectric crystals of the nested diamond lattic structure of periodicity.(specific inductive capacity is respectively ε to choose two kinds of suitable dielectric materials
1, ε
2), utilize rapid shaping and multistep gel injection-moulding legal system to be equipped with multimedium coupling photonic crystal.Said diamond lattic structure is taken out shell through CAD software and is handled, and obtains the multimedium diamond lattic structure model of air diamond lattic structure, resin-diamond structure, the mutually nested composition of the anti-diamond lattic structure of air.Inject first kind of medium ε in the air diamond lattic structure in accompanying drawing 3
1, in the anti-diamond lattic structure of air, inject second kind of medium ε then
2, obtain by medium ε through after the vacuum freeze drying
1, resin and medium ε
2Three kinds of medium couplings of the nested diamond lattic structure of forming of the periodicity that comprises three kinds of media photonic crystal
Embodiment 4
Accompanying drawing 4 is periodically to intersect the multiple medium coupling of yard structure photonic crystal.(specific inductive capacity is respectively ε to choose two kinds of suitable dielectric materials
1, ε
2), utilize rapid shaping and multistep gel injection-moulding legal system to be equipped with multimedium coupling photonic crystal.Every layer adjacent long column body injects two kinds of different dielectric material ε respectively
1, ε
2, the corresponding long column body of long column body that the upper strata is corresponding and lower floor is interconnected.Prepared multimedium photonic crystal can be the multimedium photonic crystal that comprises resin structure and two media, also can be the pure ceramic photonic crystal that comprises two kinds of potteries and air after super-dry, degreasing and sintering processes.
Embodiment 5
Make the method for multimedium coupling photonic crystal according to embodiment 1.Shown in the accompanying drawing 51 is first kind of medium grouting port; The 2nd, connected entrance, effect is to guarantee that first kind of medium can only reach the structure height of design; 3,4 is respectively first kind and second kind of medium, the 5th, and resin mould, the 6th, grouting shell.The practical implementation method is for injecting ready first kind of dielectric paste from 1; When slurry height reaches the height of 2 connected entrances; Redundant sizing agent can be from 2 outflows, and block 1 and 2 mouthful with plasticine this moment, injects fast from the model top with preprepared slurry 2.The shell broad on top, the effect of this design are to have two, the one, and when injecting first kind of dielectric paste, after slurry arrived intermediate altitude, redundant sizing agent can flow to the space on next door, finally from 2 mouthfuls of outflows, avoids flowing in the structure on top; The 2nd, when injecting second kind of dielectric paste from the model top; Slurry can be from flowing out all around; Make slurry evenly downward as far as possible, avoid second kind of dielectric paste to concentrate certain a bit to push first kind of medium downwards, thereby cause that two media mixes each other; Slip casting is accomplished after solidify, obtain comprising after the freeze drying multimedium coupling photonic crystal of resin structure and two media, also can pass through the pure ceramic photonic crystal that comprises two kinds of potteries and air after degreasing and the sintering processes.
Make the method for multimedium coupling photonic crystal according to embodiment 3.Structure shown in the accompanying drawing 6 is that Fig. 3 structure adds shell, and the centre separates diamond lattic structure and anti-diamond lattic structure with dividing plate.At first with first kind of medium ε
1Slurry inject the air diamond lattic structure; Then with second kind of medium ε
2Inject anti-diamond lattic structure, the two media slurry is comprised medium ε simultaneously after curing, freeze drying
1, medium ε
2Multimedium coupling three-D photon crystal with three kinds of media of resin.
Claims (6)
1. multimedium coupling three-D photon crystal is characterized in that, has periodically comprised the dielectric material of multiple differing dielectric constant in the multimedium coupling three-D photon crystal, comprises two kinds of forms of cyclical layer superimposition intersection in the said photonic crystal:
Periodically range upon range of multimedium coupling three-D photon crystal is meant: three-dimensional photon crystal structure is equally divided into two parts or more parts; In each part, fill the medium of differing dielectric constant respectively, form the photonic crystal that contains multiple differing dielectric constant medium simultaneously at last;
The multimedium three-D photon crystal that periodically intersects is meant: will have in the photonic crystal of periodicity three-dimensional structure; Ground floor is filled first kind of medium, and the second layer is filled second kind of medium, and the 3rd layer recharges first kind of medium; The 4th layer recharges second kind of medium, by that analogy; Or intersection is filled different medium in each layer; Perhaps the mutually nested filling of two media forms the multimedium photonic crystal.
2. three-D photon crystal according to claim 1 is characterized in that, said three-dimensional structure comprises the redundant organism of three-dimensional column diamond lattic structure and spherical diamond lattic structure and diamond lattic structure, yard structure.
3. three-D photon crystal according to claim 1 is characterized in that the used medium material comprises all stupaliths, fluent material and ultralow temperature metal material; The coupling of said multimedium is meant between the stupalith, the medium of multiple differing dielectric constant is coupled separately between the fluent material or between the ultralow temperature metal material, or multiple medium intercouples between stupalith, fluent material and the ultralow temperature metal material.
4. the manufacturing approach of multimedium coupling three-D photon crystal may further comprise the steps:
At first adopt CAD software to carry out structural design and utilize photocureable rapid shaping to make resin mould according to electromagnetic theory, and preparation ceramic size or fluent material, ultralow temperature metal material;
Secondly, adopt the multistep injection molding to prepare multimedium coupling three-D photon crystal;
5. method according to claim 4; It is characterized in that; Be directed to periodically range upon range of photonic crystal; Injection molding is carried out the communication type design with shell, and every kind of corresponding structure of dielectric material has a grouting port and a connected entrance, and the height of connected entrance is parallel with the peak of the shared structure of corresponding medium.Behind a kind of dielectric paste injection molding, seal grouting port and connected entrance with plasticine, carry out the injection molding of second kind of medium then, by that analogy, finally obtain the multimedium three-D photon crystal.
6. method according to claim 4; It is characterized in that; To with the photonic crystal of mutually nested structure, separate with dividing plate by the medium kind in the middle of the superstructure with the injection molding shell, Yi Bian be used for the injection molding of first kind of medium counter structure; Another side is used for the injection molding of second kind of medium counter structure, finally obtains multimedium coupling three-D photon crystal.
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| CN102975383A (en) * | 2012-10-18 | 2013-03-20 | 西安交通大学 | Preparation method for microwave device with gradient refractive indexes based on mixed liquid medium |
| CN106547039A (en) * | 2016-11-08 | 2017-03-29 | 西安铂力特激光成形技术有限公司 | A kind of preparation method of SiC photonic crystals |
| EP3183081A1 (en) * | 2014-08-21 | 2017-06-28 | Raytheon Company | Rapid 3d prototyping and fabricating of slow-wave structures, including electromagnetic meta-material structures, for millimeter-wavelength and terahertz-frequency high-power vacuum electronic devices |
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| CN106547039A (en) * | 2016-11-08 | 2017-03-29 | 西安铂力特激光成形技术有限公司 | A kind of preparation method of SiC photonic crystals |
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