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A strategy is presented to acquire active terahertz (THz) metamaterial by incorporating negative differential resistance carbon nanotubes. Furthermore, we propose a method of extracting active metamaterial effective parameters. This new method can effectively solve the problems of signs and multi-branches, while the traditional parameter extraction method becomes powerless for active case. Our results indicate that the active THz metamaterial with metal wires array not only has negative value of the imaginary part of the permittivity but also presents magnetic-dispersion characteristics.
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Keywords:
- active metamaterial /
- terahertz wave /
- parameter extraction /
- carbon nanotubes
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[1] Pendry J B, Holden A J, Stewart, Youngs I 1996 Phys. Rev. Lett. 76 4773
[2] Zhu W, Huang Y, Rukhlenko I D, Wen G, Premaratne M 2012 Opt. Express 20 6616
[3] Zhao D M, Shi Y L, Zhou Q L, Li L, Sun H J, Zhang C L 2011 Acta Phys. Sin. 60 093301 (in Chinese) [赵冬梅, 施宇蕾, 周庆莉, 李磊, 孙会娟, 张存林 2011 60 093301]
[4] Liu H Y, Lü Q, Luo H L, Wen S C 2010 Acta Phys. Sin. 59 256 (in Chinese) [刘虹遥, 吕强, 罗海陆, 文双春 2010 59 256]
[5] Su Y Y, Gong B Y, Zhao X P 2012 Acta Phys. Sin. 61 084102 (in Chinese) [苏妍妍, 龚伯仪, 赵晓鹏 2012 61 084102]
[6] Zhao Y, Xiang J K, Li S, Zhao X P 2011 Acta Phys. Sin. 60 054211 (in Chinese) [赵延, 相建凯, 李飒, 赵晓鹏 2011 60 054211]
[7] Chen W Y T, Han P Y, Kuo M L, Lin S Y, Zhang X C 2012 Acta Phys. Sin. 61 088401 (in Chinese) [陈吴玉婷, 韩鹏昱, Kuo Mei-Ling, Lin Shawn-Yu, 张希成 2012 61 088401]
[8] Si L M, Sun H, Lv X 2010 Chin. Phys. Lett. 27 034106
[9] Wu Q, Zhang K, Meng F Y, Li L W 2010 Acta Phys. Sin. 59 6071 (in Chinese) [吴群, 张狂, 孟繁义, 李乐伟 2010 59 6071]
[10] Zhu W, Rukhlenko I D, Premaratne M 2012 IEEE Photon. J. 4 741
[11] Si L M, Lü X 2008 Prog. Electromagn. Res. 83 133
[12] Lin W S, Luo S J, Huang H M, Zhang Q, Fu Y H 2012 Acta Phys. Sin. 61 164102 (in Chinese) [李文胜, 罗时军, 黄海铭, 张琴, 付艳华 2012 61 164102]
[13] Si L M, Jiang T, Chang K, Chen T, Lü X, Ran L, Xin H 2011 Materials 4 73
[14] Jiang T, Chang K, Si L M, Ran L, Xin H 2011 Phys. Rev. Lett. 107 205503
[15] Xiao S M, Drachev V P, Kildishev A V, Ni X J, Chettiar U K, Yuan H K, Shalaev V M 2010 Nature 466 735
[16] Si L M, Sun H, Lü X 2011 Microw. Opt. Tech. Lett. 53 515
[17] Zhu W, Rukhlenko I D, Premaratne M 2012 Appl. Phys. Lett. 101 031907
[18] Dragoman D, Dragoman M 2009 Prog. Quant. Electron. 33 165
[19] Tonouchi M 2007 Nature Photon. 1 97
[20] Choi H J, Cohen M L, Louie S G 2007 Phys. Rev. B 76 155420
[21] Dragoman D, Dragoman M 2004 Physica E 24 282
[22] Dragoman D, Dragoman M 2005 Physica E 25 492
[23] Kibis O V, da Costa M R, Portnoi M E 2007 Nano Lett. 7 3414
[24] Smith D R, Schultz S, Markos P, Soukoulis C M 2002 Phys. Rev. B 65 195104
[25] Smith D R, Vier D C, Koschny T, Soukoulis C M 2005 Phys. Rev. E 71 036617
[26] Ziolkowski R W 2003 IEEE Trass. Antenn. Propag. 51 1516
[27] Chen X D, Grzegorczyk T M, Wu B I, Pacheco J, Kong J A 2004 Phys. Rev. E 70 016608
[28] Nicolson A M, Ross G F 1970 IEEE Trass. Instrum. Meas. 19 377
[29] Weir W B 1974 Proc. IEEE 62 33
[30] Erentok A, Ziolkowski R W 2007 Appl. Phys. Lett. 91 184104
[31] Si L M, Lü X 2008 Mod. Phys. Lett. B 22 2843
[32] Khoo K H, Neaton J B, Son Y W, Cohen M L, Louie S G 2008 Nano Lett. 8 2900
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