CN103199348A - Intermediate infrared 10.6-micrometer narrow bandwidth angle wave-absorbing material - Google Patents
Intermediate infrared 10.6-micrometer narrow bandwidth angle wave-absorbing material Download PDFInfo
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- CN103199348A CN103199348A CN2013101221810A CN201310122181A CN103199348A CN 103199348 A CN103199348 A CN 103199348A CN 2013101221810 A CN2013101221810 A CN 2013101221810A CN 201310122181 A CN201310122181 A CN 201310122181A CN 103199348 A CN103199348 A CN 103199348A
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Abstract
The invention provides an intermediate infrared 10.6-micrometer narrow bandwidth angle wave-absorbing material, and discloses a metamaterial wave-absorbing material based on a plane two dimensional photonic crystal structure. The wave-absorbing material comprises three layers, wherein the first layer is a cross-shaped metal tungsten patch periodic array, the second layer is a medium layer, and the third layer is a metal reflection layer. By means of optimization of structural parameters, the wave-absorbing material has relatively ideal absorbing effects around 10.6 micrometers, the absorption rate of the wave-absorbing material can achieve more than 98% for TE waves with incident angles ranging from 0 degree to 40 degrees, and the absorption rate of the wave-absorbing material can achieve more than 98% for TM waves with incident angles ranging from 0 degree to 80 degrees.
Description
Technical field
The present invention relates to the two dimensional surface photonic crystal, in particular, relate to a kind of metamaterial absorbing material that can realize absorption characteristics such as narrow bandwidth angle and polarization have nothing to do at 10.6 μ m places.
Background technology
Along with science and technology development, owing to increasing day by day of electromagnetic equipment, electromagenetic wave radiation also increases day by day to the influence of environment, and in order to administer electromagnetic pollution, the research of absorbing material has become key subjects when prescience.Absorbing material is a class material that can absorb the electromagnetic wave energy that is radiated its surface, and it has in actual life widely uses.Such as, can come for medical diagnosis and bio-sensing in the absorption characteristic around the 10 μ m by judging typical pathogen; In addition, infrared absorption characteristic can be used for infrared imaging, microwave dark room etc. equally.
Generally speaking, material absorbs electromagnetic primary condition and is: (1) when electromagnetic wave incided material surface, it can enter material internal to greatest extent, namely required material to have impedance matching property; (2) electromagnetic wave that enters material internal can attenuate rapidly, i.e. attenuation characteristic.Though people put forward the design of a variety of absorbing materials so far, yet it should be noted that, usually the condition of electromagnetic wave normal incidence has only been considered in these designs, polarization characteristic and angular characteristics when but having ignored the electromagnetic wave oblique incidence, thereby performance is not fully up to expectations when absorbing the oblique incidence electromagnetic wave.
The Metamaterial material is a kind of artificial composite material, and has the characteristic that natural material does not have, such as negative index.Most metamaterial material is to be made of the periodic metal structure of size less than operation wavelength, this metal structure is to be mingled with one deck dielectric material in the middle of the double layer of metal resonator, utilize the metal resonator that electroresponse is provided, magnetic response is provided by the inverse parallel electric current of medium both sides.
Usually the absorption characteristic of metamaterial material very easily is subjected to the influence of incident angle and polarization characteristic, the structure of mentioning in the article " Perfect Metamaterial Absorber " that Physical Review Letters delivers such as N.I.Landy etc. only can be operated under the normal incidence condition, and the absorption of this structure decays rapidly when the incident wave run-off the straight.In order to improve angle and the polarization characteristic that the metamaterial material absorbs, Bingnan Wang etc. has mentioned a kind of new structure in " Wide-angle and polarization-independent chiral metamaterial absorber " on Physical Review Letters, it has the irrelevant and wide-angle absorption characteristic of polarization, yet this structure is very complicated, is difficult to be applied to middle-infrared band.We have designed a kind of metamaterial material simple in structure in the present invention, have narrow bandwidth angle and the irrelevant absorption characteristic of polarization.
Summary of the invention
Technical problem to be solved by this invention is, at the bad and serious deficiency of polarization dependent of at present existing absorbing material angular characteristics, proposes a kind of have narrow bandwidth angle and the irrelevant metamaterial absorbing material of polarization.
The technical scheme that the present invention solves its technical problem employing is to propose a kind of metamaterial absorbing material based on the planar photonic crystal, and it comprises three-decker: ground floor is criss-cross tungsten periodic arrangement array; The second layer is the low refractive index polymer with loss; The 3rd layer is the layer of metal reflector.
Further, the thickness of described ground floor tungsten is less than the skin depth of the corresponding tungsten of 10.6 μ m infrared waves.
Further, described its relative dielectric constant of second layer polymeric material is 2.88+0.09i, losstangenttan=0.0313
Further, the thickness of described three-layer metal must be greater than this metal in this wave band skin depth accordingly.
Further, the period p of described ground floor cross tungsten periodic arrangement array be 5.2 μ m to 5.3 μ m, its cross length l is 2.71 μ m, width w is 1.75 μ m.
Further, the thickness of described second layer polymeric material is that 0.35 μ m is to 0.38 μ m.
Further, described three-layer metal can adopt the metal material of gold, silver, the contour reflection of copper.
Further, the thickness of described ground floor cross tungsten paster is that 0.095 μ m is to 0.105 μ m.
Further, the thickness of described three-layer metal should be greater than 0.2 μ m.
The present invention has designed a kind of metamaterial absorbing material, obtained wide angle and the irrelevant absorption characteristic of polarization around 10.6 μ m by optimizing its structural parameters, and its general thickness is no more than 1 μ m.
Description of drawings
Fig. 1 is perspective view and the cellular construction schematic diagram of metamaterial absorbing material of the present invention.
Fig. 2 is the emulation assimilation effect figure of metamaterial absorbing material of the present invention under the TE pattern.
Fig. 3 is the emulation assimilation effect figure of metamaterial absorbing material of the present invention under the TM pattern.
Embodiment
Please refer to Fig. 1, Fig. 1 is overall structure and the cellular construction schematic diagram of metamaterial absorbing material of the present invention.As shown in Figure 1, the present invention includes three-decker, its ground floor is criss-cross tungsten paster cyclic array, and the second layer is dielectric layer, and the 3rd layer is metallic reflector.
Material of the present invention is respectively: ground floor adopts tungsten, and its electromagnetic property is with reference to Edward D.Palik " Handbook of Optical Constants of Solids "; The second layer is one layer of polymeric, and its relative dielectric constant is 2.88+0.09i, and losstangenttan=0.0313, the three layer is metallic reflector, and its optional material comprises the anti-metal materials of infrared height such as gold, silver, copper.
For the height that is implemented in infrared 10.6 μ m places absorbs, the present invention obtains the irrelevant assimilation effect of wide angle polarization by the parameter of optimizing structure.We obtain the present invention its correspondingly structural parameters be: its period p of cross tungsten paster cyclic array influences the angular characteristics that the present invention absorbs, and obtaining the optimal p value of the present invention by the parameter analysis is that 5.2 μ m are to 5.3 μ m; The long l of cross paster, wide w have influenced the resonance frequency of resonance, and in order to make just in time corresponding resonance frequency of absworption peak, the only l value of the present invention is 2.71 μ m, and the w value is 1.75 μ m; The one-tenth-value thickness 1/10 of ground floor cross tungsten paster at 0.095 μ m between the 0.105 μ m; The absorptivity influence of the structure of second layer polymer thickness d is very big, and it is that 0.35 μ m is to 0.38 μ m that the present invention afterwards that optimizes structure obtains the most suitable d value; The three-layer metal layer is as the reflector, and it can strengthen the mutual interference of electromagnetic wave between structure, thus the present invention adapt to thickness must be greater than the skin thickness that becomes of infrared band correspondence.
Fig. 2,3 has calculated the assimilation effect of the present invention's correspondence under different mode.As shown in Figure 2, under the TE pattern, along with the variation of incident angle, though absorptivity of the present invention can change accordingly, its absworption peak position does not have to change substantially.We are as can be seen when incident angle during less than 40 °, the present invention for the absorptivity of TE ripple more than 98%, but when incident angle continued increase, absorption characteristic of the present invention decreased.As shown in Figure 3, under the TM pattern, along with the variation of incident angle, the corresponding absorption characteristic collection of illustrative plates of the present invention.We can no matter how incident angle changes from Fig. 3, and always all more than 98%, and the position of absworption peak does not change for the absorption characteristic of TM ripple in the present invention.Fig. 2,3 confirms that the present invention has the assimilation effect of relative ideal, wherein approaches desirable in the absorption for the TM ripple.
Claims (6)
1. metamaterial absorbing material based on the planar photonic crystal, it is characterized in that: comprise three-decker, namely ground floor is criss-cross tungsten paster cyclic array, and the second layer is dielectric layer, and the 3rd layer is metallic reflector.
2. metamaterial absorbing material as claimed in claim 1, it is characterized in that: the thickness of ground floor tungsten paster is less than tungsten in the skin depth of this frequency range correspondence, in the present invention metal patch thickness at 0.095 μ m between the 0.105 μ m.
3. metamaterial absorbing material as claimed in claim 1, it is characterized in that: second layer dielectric layer is polymeric material, and its relative dielectric constant is 2.88+0.09i, and loss angle tangent is tan δ=0.0313; The three-layer metal reflector material can be chosen the anti-metals of infrared height such as gold, silver, copper.
4. metamaterial absorbing material as claimed in claim 2, it is characterized in that: its length of described cross tungsten paster is 2.71 μ m, and wide is 1.75 μ m, and its repetition period is that 5.2 μ m are in 5.3 mu m ranges.
5. metamaterial absorbing material as claimed in claim 3, it is characterized in that: second layer thickness of dielectric layers is that 0.35 μ m is to 0.38 μ m.
6. metamaterial absorbing material as claimed in claim 3, it is characterized in that: the thickness in three-layer metal reflector must be greater than the skin depth of this metal in middle-infrared band, and the present invention requires this layer thickness to be greater than 0.2 μ m.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913788A (en) * | 2013-11-20 | 2014-07-09 | 电子科技大学 | Middle-infrared band broadband cycle wave-absorbing material |
| CN107276524A (en) * | 2017-05-17 | 2017-10-20 | 湖北工业大学 | Meta Materials selective radiator based on cross structure |
| CN107333437A (en) * | 2017-07-14 | 2017-11-07 | 深圳天珑无线科技有限公司 | A kind of electronic equipment and its heat radiation module |
| CN108666764A (en) * | 2018-04-23 | 2018-10-16 | 天津工业大学 | A kind of strong absorber of ultra-thin Terahertz of multiband |
| CN113410647A (en) * | 2021-03-25 | 2021-09-17 | 重庆邮电大学 | Terahertz dual-band narrow-band absorber based on metamaterial structure and manufacturing method thereof |
| CN114824828A (en) * | 2022-05-07 | 2022-07-29 | 电子科技大学 | Narrowband wave absorber based on inverted cross-shaped star structure |
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| US20120057616A1 (en) * | 2006-03-08 | 2012-03-08 | Los Alamos National Security, Llc | Dynamical/Tunable Electromagnetic Materials and Devices |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20120057616A1 (en) * | 2006-03-08 | 2012-03-08 | Los Alamos National Security, Llc | Dynamical/Tunable Electromagnetic Materials and Devices |
Non-Patent Citations (2)
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| DMITRY YU ET AL: "Dmitry Yu et al", 《INFRARED, MILLIMETER, AND TERAHERTZ WAVES, 2009. IRMMW-THZ 2009. 34TH INTERNATIONAL CONFERENCE ON》 * |
| RANJAN SINGH AND WEILI ZHANG: "Resonant Properties of Terahertz Metamaterials of Sub-Skin-Depth Thicknesses", 《LASERS AND ELECTRO-OPTICS, 2008 AND 2008 CONFERENCE ON QUANTUM ELECTRONICS AND LASER SCIENCE. CLEOQELS 2008. CONFERENCE ON》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913788A (en) * | 2013-11-20 | 2014-07-09 | 电子科技大学 | Middle-infrared band broadband cycle wave-absorbing material |
| CN103913788B (en) * | 2013-11-20 | 2016-08-17 | 电子科技大学 | Middle-infrared band broadband cycle absorbing material |
| CN107276524A (en) * | 2017-05-17 | 2017-10-20 | 湖北工业大学 | Meta Materials selective radiator based on cross structure |
| CN107333437A (en) * | 2017-07-14 | 2017-11-07 | 深圳天珑无线科技有限公司 | A kind of electronic equipment and its heat radiation module |
| CN108666764A (en) * | 2018-04-23 | 2018-10-16 | 天津工业大学 | A kind of strong absorber of ultra-thin Terahertz of multiband |
| CN113410647A (en) * | 2021-03-25 | 2021-09-17 | 重庆邮电大学 | Terahertz dual-band narrow-band absorber based on metamaterial structure and manufacturing method thereof |
| CN114824828A (en) * | 2022-05-07 | 2022-07-29 | 电子科技大学 | Narrowband wave absorber based on inverted cross-shaped star structure |
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Application publication date: 20130710 |