叠层结构电磁超材料吸波体的特性研究
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摘要
以现有的电磁超材料吸波体的主要方案为基础,对吸波体结构进行改进,研究并比较了相同单元叠层结构、不同单元叠层结构超材料吸波体的性能。根据仿真分析得出:适当增加相同单元叠层结构的层数,不仅吸波率得到提升,还会出现多个吸波峰;此外,不同单元叠层结构,在参数合理配置时,不仅拥有相同单元叠层结构的多频段、高吸波率、宽频带等优点,还可以实现近100%吸波率的完美吸波。
Based on the typical scheme of electromagnetic metamaterials designed for absorbing,this paper presents an improved scheme:multi-layer configuration.We focus on the absorbing properties of 2types of multilayer configurations:with same units and different units,respectively.The simulation results show that for the same units type,higher absorbing rate and extra multiple curve peaks can be got if we increase the number of the layers properly.Moreover,as to the different units type,it can be made not only with the above advantages:multi-working bands,high absorbing rate and wide frequency range,but also with a nearly 100% absorbing rate,as a perfect absorber.
Based on the typical scheme of electromagnetic metamaterials designed for absorbing,this paper presents an improved scheme:multi-layer configuration.We focus on the absorbing properties of 2types of multilayer configurations:with same units and different units,respectively.The simulation results show that for the same units type,higher absorbing rate and extra multiple curve peaks can be got if we increase the number of the layers properly.Moreover,as to the different units type,it can be made not only with the above advantages:multi-working bands,high absorbing rate and wide frequency range,but also with a nearly 100% absorbing rate,as a perfect absorber.
引文
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[16]Ye Y Q,Jin Y,He S L.Omnidirectional polarization-insensitive and broadband thin absorber in the terahertz region[J].Opt Soc Am B,2010,27(3):498-504.
[17]Zhu B,Huang C,Feng Y.Dual band switchable metamaterial electromagnetic absorber[J].Prog Electromagn Res B,2010,24:121-129.
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[19]Liu Lingyun,Hu Changshou,Guo Biao.Research on absorbing properties of metamaterial absorber[J].Materials Review,2010,24(10):1-3.
[20]Ghosh S,Bhattacharyya S,Kaiprath Y,et al.Bandwidth-enhanced polarization-insensitive microwave metamaterial absorber and its equivalent circuit model[J].Journal of Applied Physics,2014,115(10):664-667.
[21]Zhou Long,Zhang Wentao,Hu Fangrong,et al.Study on equivalent circuit model of terahertz absorber based on split ring resonator(SRR)[J].Laser&Infrared,2014,(6):664-667.
[22]Chen Hongsheng.Study on equivalent circuit model theory and experiment of anisotropic medium[D].Hangzhou:Zhejiang University,2005.
[2]Vesolago V G.The electrodynamics of substances with simultaneously negative values ofεandμ[J].Soviet Physics Uspekh,1967,10(4):517-526.
[3]Zhang Yongxiang,Li Suqi.Study on hexagonalpolycrystalline ferrite material with electron-wave absorbing[J].Journal of the Chinese Ceramic Society,1998,26(3):275-280.
[4]Feng Zekun,He Zehui.Study of electromagnetic wave absorber with wide-bandth frequency composed of rubber and ferrite[J].Journal of Functional Materials,2003,34(5):532-534.
[5]Wang Qi,Guan Jianguo,Liu Shiquan,et al.Influences of ionic substitution on the structure and microwave absorption performance of hexaferrite[J].Bulletin of the Chinese Ceramic Society,2005,24(2):66-71.
[6]Munk B A.Frequency selective surfaces:theory and design[M].John Wiley&Sons,2005.
[7]Eleftheriades G V,Siddiqui O,Iyer A K.Transmission line models for negative refractive index media and associated implementations without excess resonators[J].Microwave and Wireless Components Letters,IEEE,2003,13(2):51-53.
[8]Tao H,Landy N I,Bingham C M,et al.A metamaterial absorber for the terahertz regime:design,fabrication and characterization[J].Optics Express,2008,16(10):7181-7188.
[9]Landy N I,Bingham C M,Tyler T,et al.Design,theory,and measurement of a polarization insensitive absorber for terahertz imaging[J].Physical Review B,2009,79(12):125-104.
[10]Landy N I,Sajuyigbe S,Mock J J,et al.Perfect metamaterial absorber[J].Phys Rev Lett,2008,207402(100):1-4.
[11]Zhu W,Zhao X.Metamaterial absorber with dendritic cells at infrared frequencies.[J].Opt Soc Am B,2009,26(12):2382-2385.
[12]Hu Tao,Bingham C M,Strikwerda A C.Highly flexible wide angle of incidence terahertz metamaterial absorber:design,fabrication,and characterization[J].Phys Rev B,2008,241103(78):1-4.
[13]Tyler,Tatiana Starr,et al.Taming the blackbody with infrared metamaterials as selective thermal emitters[J].Phys Rev Lett,2011,045901(107):1-4.
[14]Shen X P,Cui T J,Zhao T J,et al.Polarization-independent wide-angle triple-band metamaterial absorber[J].Opt Express,2011,19(10):9401-9407.
[15]Han J G,Gu J Q,Lu X C.Broadband resonant terahertz transmission in a composite metal-dielectric structure[J].Opt Express,2009,19(17):16527-16534.
[16]Ye Y Q,Jin Y,He S L.Omnidirectional polarization-insensitive and broadband thin absorber in the terahertz region[J].Opt Soc Am B,2010,27(3):498-504.
[17]Zhu B,Huang C,Feng Y.Dual band switchable metamaterial electromagnetic absorber[J].Prog Electromagn Res B,2010,24:121-129.
[18]Liu Lingyun,Hu Changshou,Fu Bo,etal.Numerical research on tunable metamaterial absorber[J].Journal of Functional Materials,2012,42(2):287-290.
[19]Liu Lingyun,Hu Changshou,Guo Biao.Research on absorbing properties of metamaterial absorber[J].Materials Review,2010,24(10):1-3.
[20]Ghosh S,Bhattacharyya S,Kaiprath Y,et al.Bandwidth-enhanced polarization-insensitive microwave metamaterial absorber and its equivalent circuit model[J].Journal of Applied Physics,2014,115(10):664-667.
[21]Zhou Long,Zhang Wentao,Hu Fangrong,et al.Study on equivalent circuit model of terahertz absorber based on split ring resonator(SRR)[J].Laser&Infrared,2014,(6):664-667.
[22]Chen Hongsheng.Study on equivalent circuit model theory and experiment of anisotropic medium[D].Hangzhou:Zhejiang University,2005.