CN100498396C - Three-dimensional laminated photon crystal implementing thermal radiation optical spectrum control - Google Patents
Three-dimensional laminated photon crystal implementing thermal radiation optical spectrum control Download PDFInfo
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- CN100498396C CN100498396C CNB2006100965217A CN200610096521A CN100498396C CN 100498396 C CN100498396 C CN 100498396C CN B2006100965217 A CNB2006100965217 A CN B2006100965217A CN 200610096521 A CN200610096521 A CN 200610096521A CN 100498396 C CN100498396 C CN 100498396C
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Abstract
The present invention relates to a three dimensional cascade photonic crystal for achieving the spectrum control of thermal radiation and comprises a transverse layer consisting of four or more than four metal bar in transverse, parallel and equidistant arrangement and a vertical layer consisting of four or more than four metal bars in vertical, parallel and equidistant arrangement; the transverse layer and the vertical layer are mutually alternate and overlaid to a three dimensional structure; the number of the layers of three dimensional structure is the integral multiple of four; a dielectric layer is arranged between the transverse layer and the vertical layer. The invention can achieve spectrum control in all directions of space; as the three directions of the space of the microstructure has periodicity, the spectrum control in all directions of space can be achieved; the adjustability of spectrum control can be greatly strengthened; as dielectric material layers with certain thickness are inserted between the metal bars and through changing the thickness or the dielectric material of the dielectric layer, the property of spectrum control can be adjusted conveniently.
Description
One technical field
The invention belongs to thermal radiation optical spectrum control field, can be used for technology such as thermoelectric generation technology, light source technology, the target relevant with thermal radiation optical spectrum control be stealthy, particularly a kind of three-dimensional laminated photon crystal of realizing that thermal radiation optical spectrum is controlled.
Two background technologies
Utilize periodic micro structure to realize that thermal radiation optical spectrum control is a kind of novel thermal radiation optical spectrum control method that development in recent years is got up.Compare with classic method, this new method has that control characteristic is good, control method flexibly, advantage such as applied range, can be widely used in technology such as thermoelectric generation technology, power-saving technology, light source technology, laser technology and target be stealthy.
Periodic micro structure is the key point that this new method realizes thermal radiation optical spectrum control, when the heat radiation energy passes through periodic micro structure, the heat radiation energy will be modulated and redistribute to the cyclophysis of microstructure, thereby make the heat radiation energy form certain reflection, transmission and absorption characteristic, so the structural cycle characteristic of microstructure has determined the final effect of its thermal radiation optical spectrum control at different wave bands.
People such as the A.Narayanaswamy of the U.S. and G.Chen have designed one-dimensional metal/dielectric material photon crystal structure (A.Narayanaswamy, G.Chen.Thermal emission control with one-dimensionalmetallodielectric photonic crystals.PHYSICAL REVIEW B, 2004,70:125101-125104).This periodic micro structure by metal film layer and dielectric material film layer along the space direction cycle alternately arrange and form, have certain thermal radiation optical spectrum control effect.Heat radiation control characteristic (the H.Sai of tungsten two-dimensional surface optical grating construction has studied in the Hitoshi Sai research group of Japan, H.Yugami.Thermophotovoltaic generation withselective radiators based on tungsten surface gratings.APPLIED PHYSICS LETTERS, 2004,85 (16): 3399-3401), they go out square pit along the both direction periodic arrangement in the surface working of tungsten plate, by the size Control heat radiation control band of pit.More than two kinds of typical cycle microstructures all can be used for thermal-radiating spectrum control, but its common drawback is to realize the thermal radiation optical spectrum control of a direction, and controllability is very limited.
S.Lin, the J.G.Fleming of U.S. Sandia National Laboratory and J.Moreno research group are devoted to the research (S.Y.Lin of three-dimensional building blocks shape tungsten photonic crystal thermal radiation optical spectrum control in recent years always, J.Moreno, J.G.Flemign.Three-dimensional photonic-crystal emitter for thermal photovoltaic powergeneration.APPLIED PHYSICS LETTERS, 2003,83 (2): 380-382).The metal tungsten bar that they adopt is similar to the mode that plays with building blocks and becomes periodic structure in spatial disposition, this periodic micro structure is a kind of proper three-dimensional periodic structure, therefore thermal radiation optical spectrum control that can all directions of implementation space be the controllability of spectrum control but need improved.
As previously mentioned, the periodicity of microstructure is the key point that periodic micro structure obtains thermal radiation optical spectrum control preferably, this mainly shows the directivity and periodic characteristic two aspects in cycle: one, the directivity in microstructure cycle has determined the direction of thermal radiation optical spectrum control, be there is certain feature in microstructure on certain direction in space periodicity, then will on this direction, can realize the thermal radiation optical spectrum control of certain wave band.Two, periodic characteristic has determined the feature of thermal radiation optical spectrum control, different periodic characteristics will form the feature of different modulation and distribution to the heat radiation energy that enters microstructure, and then reflection, transmission and the absorbing features of final heat radiation energy are also with different.
Three summary of the invention
The object of the present invention is to provide and a kind ofly can realize thermal radiation optical spectrum any direction control, conveniently adjusted three-dimensional laminated photon crystal structure.
Realize the technical solution of the object of the invention: a kind of three-dimensional laminated photon crystal of realizing thermal radiation optical spectrum control, comprise by four or four above metal bars are laterally parallel and equidistantly rearrange transverse layers and equidistantly rearrange longitudinal layer by four or four above metal bar parallel longitudinals, this transverse layers and longitudinal layer alternately are superimposed as the 3-D solid structure that the number of plies is 4 integral multiple mutually, between described transverse layers and the longitudinal layer dielectric layer are set; The length L of the metal bar of transverse layers and longitudinal layer 〉=10 λ
c, width W=0.3～0.5 λ
c, height H=0.3～0.5 λ
cAnd the space D of each root metal bar=0.8 λ
c, λ
cLower limit wavelength for the target control wave band; Thickness of dielectric layers is h=0.03～0.4 λ
c, λ
cLower limit wavelength for the target control wave band.
The present invention realizes that the transverse layers of the three-dimensional laminated photon crystal that thermal radiation optical spectrum is controlled and the metal bar of longitudinal layer are tungsten, gold or copper metal material.
The present invention realizes that the dielectric layer of the three-dimensional laminated photon crystal of thermal radiation optical spectrum control is silicon dioxide or titanium dioxide dielectric material.
The present invention realizes that the cross section of the metal bar of the transverse layers of three-dimensional laminated photon crystal of thermal radiation optical spectrum control and longitudinal layer is a rectangle.
The present invention compares with existing structure, its remarkable advantage is: (1) spectrum control on can all directions of implementation space, because three directions in space of microstructure itself all exist periodically, therefore the spectrum control on can the implementation space all directions, this has very outstanding practicality than one-dimensional metal/dielectric material photon crystal structure, two-dimensional surface optical grating construction; (2) than three-dimensional building blocks shape tungsten photonic crystal structure, the controllability of spectrum control is strengthened greatly, inserted certain thickness dielectric materials layer between each metal bar layer,, can regulate the spectrum control characteristic easily by changing the thickness or the dielectric material of dielectric layer; (3) range of application is further expanded, for example, its easily controllability can be used for target stealth technology and laser technology.
Four description of drawings
Fig. 1 is the main TV structure synoptic diagram that the present invention realizes the three-dimensional laminated photon crystal of thermal radiation optical spectrum control.
Fig. 2 is the left side TV structure synoptic diagram that the present invention realizes the three-dimensional laminated photon crystal of thermal radiation optical spectrum control.
Five embodiments
Below in conjunction with accompanying drawing the present invention is described in further detail.
In conjunction with Fig. 1 and Fig. 2, the present invention realizes the three-dimensional laminated photon crystal of thermal radiation optical spectrum control, comprise by four or four above metal bars are laterally parallel and equidistantly rearrange transverse layers 1 and equidistantly rearrange longitudinal layer 2 by four or four above metal bar parallel longitudinals, this transverse layers 1 and longitudinal layer 2 alternately is superimposed as the 3-D solid structure that the number of plies is 4 integral multiple mutually, between described transverse layers 1 and the longitudinal layer 2 dielectric layer 3 is set.
Realize the method for the three-dimensional laminated photon crystal of thermal radiation optical spectrum control of the present invention, for sake of convenience, at first the three-dimensional cartesian coordinate system of definition space laterally is the x direction, vertically is the y direction, and the height stereo directional is the z direction.The lower limit wavelength of thermal radiation optical spectrum control is λ
c(1) select the metal bar (as tungsten, silver or copper etc.) of definite shape for use, the cross section of metal bar is a rectangle, and satisfies length L more than or equal to 10 λ
c, width W=(0.3～0.5) λ
c, H=(0.3～0.5) λ
c(2) with metal bar along the parallel equidistant arrangement of x direction, the space D of metal bar=0.8 λ
c, the number of metal bar constitutes metal bar transverse layers 1 more than or equal to 4; (3) with metal bar along the parallel equidistant arrangement of y direction, the space D of metal bar=0.8 λ
c, the number of metal bar constitutes metal bar longitudinal layer 2 more than or equal to 4; (4) one deck dielectric materials layer (as silicon dioxide or titanium dioxide etc.) is set between transverse layers 1 and longitudinal layer 2, the thickness h of dielectric materials layer 3=(0.03～0.4) λ
c(5) at z direction alternately superpose mutually transverse layers 1 and longitudinal layer 2, and between the transverse layers 1 of stack and longitudinal layer 2, one deck dielectric materials layer is set, so just can forms the basic unit body of three-dimensional laminated photon crystal structure.Three-dimensional laminated photon crystal structure among the present invention is made of an above-described basic unit body at least.
Be example with control greater than the spectral characteristic of the mid and far infrared wave band of 5 μ m (control band lower limit wavelength) below, illustrate that the concrete enforcement step of the present invention is poly-:
1, determines target control wave band lower limit wavelength.The lower limit wavelength X of control band
c=5 μ m, promptly the target control wave band is that 5 μ m are to the mid and far infrared wave band;
2, choose the metal material of transverse layers 1 and longitudinal layer 2.The metal bar material is chosen tungsten;
3, determine the parameters of tungsten bar.Tentatively determine each parameter value according to previously described parameters relationship: the width W of tungsten bar=0.4 λ
c, height H=0.35 λ
c, the space D of tungsten bar=0.8 λ
c
4, dielectric layer 3 is a silicon dioxide, its thickness h=0.07 λ
c
5, the length of tungsten bar is taken as 50 μ m, then the length of silicon dioxide layer and the wide 50 μ m that also are taken as;
6, along totally 8 layers from the bottom to top on the tungsten bar layer of short transverse, then silicon dioxide layer is totally 7 layers, along the short transverse horizontal and vertical arrangement of each layer from the bottom to top.
Can obtain the three-dimensional laminated photon crystal structure according to above step 1～6, calculate the complete transmission that confirms these structure realization 5～6 μ m sections through Finite Difference-Time Domain separating method (FDTD), 7.3～9.6 μ m and 10.4～20 μ m reflect fully, 9.6 there is an absorption band in～10.4 μ m, absorption peak is corresponding to 10 μ m.
Claims (4)
1, a kind of three-dimensional laminated photon crystal of realizing thermal radiation optical spectrum control, it is characterized in that: comprise by four or four above metal bars are laterally parallel equidistantly rearranging transverse layers [1] and equidistantly rearranging longitudinal layer [2] by four or four above metal bar parallel longitudinals, this transverse layers [1] and longitudinal layer [2] mutually alternately are superimposed as the 3-D solid structure that the number of plies is 4 integral multiple, between described transverse layers [1] and the longitudinal layer [2] dielectric layer [3] are set; The length L of the metal bar of transverse layers [1] and longitudinal layer [2] 〉=10 λ
c, width W=0.3～0.5 λ
c, height H=0.3～0.5 λ
cAnd the space D of each root metal bar=0.8 λ
c, λ
cLower limit wavelength for the target control wave band; Dielectric layer [3] thickness is h=0.03～0.4 λ
c, λ
cLower limit wavelength for the target control wave band.
2, the three-dimensional laminated photon crystal of realization thermal radiation optical spectrum control according to claim 1, it is characterized in that: the metal bar of transverse layers [1] and longitudinal layer [2] is tungsten, gold or copper metal material.
3, the three-dimensional laminated photon crystal of realization thermal radiation optical spectrum control according to claim 1, it is characterized in that: dielectric layer [3] is silicon dioxide or titanium dioxide dielectric material.
4, the three-dimensional laminated photon crystal of realization thermal radiation optical spectrum control according to claim 1, it is characterized in that: the cross section of the metal bar of transverse layers [1] and longitudinal layer [2] is a rectangle.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102237258B (en) * | 2010-05-07 | 2013-05-01 | 同济大学 | Broadband spatial coherence thermal radiation light source |
| CN103150954B (en) * | 2013-04-11 | 2014-09-10 | 青岛大学 | Method for demonstrating shielding effect of photonic crystal |
| WO2015129668A1 (en) * | 2014-02-28 | 2015-09-03 | 国立研究開発法人科学技術振興機構 | Thermal-radiation light source and two-dimensional photonic crystal used therein |
| CN107136589B (en) * | 2017-01-31 | 2018-12-21 | 大连理工大学 | A kind of stealthy cape of controllable three-dimensional optical based on multilayer liquid crystal material |
| CN107080305B (en) * | 2017-01-31 | 2018-12-21 | 大连理工大学 | A kind of stealthy cape of controllable Three Dimensional Thermal based on multi-layer transparent conductive oxide |
| CN107114833B (en) * | 2017-01-31 | 2018-12-21 | 大连理工大学 | A kind of stealthy cape of controllable Two-Dimensional Heat based on multi-layer nano fluid |
| CN107048517B (en) * | 2017-01-31 | 2019-03-26 | 大连理工大学 | A kind of stealthy cape of controllable Two-Dimensional Heat based on multilayer paraffin phase change material |
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