基于超材料的太赫兹波段多频吸收器
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摘要
基于闭合三圆环结构,设计了一种太赫兹超材料吸收器。研究表明,该超材料设计单元在0. 5 THz～2. 5 THz范围内表现出显著的多频吸收的性能,对应三个频率的吸收率都达到98%以上。通过改变单元结构金属环的径向宽度发现,随着金属环径向宽度的增加,对应的吸收频率会发生一定程度的蓝移,当径向宽度为3μm时,单元结构吸收性能最佳,达到99%以上。研究结论为太赫兹吸收器的研究提供参考。
Based on the closed three-ring structure,a terahertz metamaterial absorber is designed. This study shows that the metamaterial design unit exhibits significant multi-frequency absorption performance in the range of 0. 5 THz ～ 2. 5 THz,and the corresponding three-absorption rate reaches more than 98%. By changing the radial width of the metal ring of the cell structure,it is found that with the increase of the radial width of the metal ring,the corresponding absorption frequency will have a certain degree of blue shift. When the radial width is 3 μm,the cell structure has the best absorption performance,the absorption rate is more than 99%. The research conclusions provide reference for the research of terahertz absorbers.
Based on the closed three-ring structure,a terahertz metamaterial absorber is designed. This study shows that the metamaterial design unit exhibits significant multi-frequency absorption performance in the range of 0. 5 THz ～ 2. 5 THz,and the corresponding three-absorption rate reaches more than 98%. By changing the radial width of the metal ring of the cell structure,it is found that with the increase of the radial width of the metal ring,the corresponding absorption frequency will have a certain degree of blue shift. When the radial width is 3 μm,the cell structure has the best absorption performance,the absorption rate is more than 99%. The research conclusions provide reference for the research of terahertz absorbers.
引文
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[12]沈晓鹏,崔铁军,叶建祥.基于超材料的微波双波段吸收器[J].物理学报,2012,61(5):058101.
[13]杨欢欢,曹祥玉,高军.基于电谐振分离的宽带地雷达截面超材料吸波体[J].物理学报,2013,62(21):214101.
[14]张检发,袁晓东,秦石乔.可调太赫兹与光学超材料[J].中国光学,2014,7(3):349-364.
[15]杨磊,范飞,陈猛,等.多功能太赫兹超表面偏振控制器[J].物理学报,2016,65(8):080702.
[16]漠漫漫,文岐业,陈智,等.基于圆台结构的超宽带计划不敏感太赫兹吸收器[J].物理学报,2013,62(23):237801.
[2]赵国忠,申彦春,刘影.太赫兹技术在军事和安全领域的应用[J].电子测量与仪器学报,2015,29:1097-1101.
[3]赵国忠.太赫兹科学技术研究的新进展[J].国外电子测量技术,2014,33:1-6.
[4]张建娜,张波,沈京玲.太赫兹超材料的吸收调制方法[J].激光与光电子学进展,2016,53:110002.
[5]赵碧辉,文岐业,谢云松,等.电磁超材料吸收器的研究进展[J].电子元件与材料,2011,30:82-86.
[6]WANG.K.L,MITTLEMAN.D.M.Metal wires for Terahertz Wave guiding[J].Nature,2004,432:376-379.
[7]MENDIS.R.,GRISCHKOWSKY.D.THz interconnect with low-loss and low-group velocity dispersion[J].Microwave&Wireless Components Letters IEEE,2001,11(11):444-446.
[8]MORRIS.D.Enhanced coupling of terahertz radiation to cylindrical wire waveguides[J].Optics Express,2006,14(1):279-290.
[9]CHEN.H.T,PADILLA.W.J,ZIDE.J.M,et al.Active terahertz metamaterial devices[J].Nature,2006,444(7119):597-600.
[10]张璋,于建达,姚建铨,等.太赫兹超材料多频吸收器特性研究[J].枣庄学院学报,2017,34:33-39.
[11]PENDRY.J.B.Negative refraction makes a perfect absorber[J].Physical Review Letters,2000,85(18):3966-3969.
[12]沈晓鹏,崔铁军,叶建祥.基于超材料的微波双波段吸收器[J].物理学报,2012,61(5):058101.
[13]杨欢欢,曹祥玉,高军.基于电谐振分离的宽带地雷达截面超材料吸波体[J].物理学报,2013,62(21):214101.
[14]张检发,袁晓东,秦石乔.可调太赫兹与光学超材料[J].中国光学,2014,7(3):349-364.
[15]杨磊,范飞,陈猛,等.多功能太赫兹超表面偏振控制器[J].物理学报,2016,65(8):080702.
[16]漠漫漫,文岐业,陈智,等.基于圆台结构的超宽带计划不敏感太赫兹吸收器[J].物理学报,2013,62(23):237801.