[1] Veselago V G 1968 Sov. Phys. Usp. 10 509
[2] Pendry J B, Holden A J, Robbins D J, Stewart W J 1999 IEEE. Trans. Microwave Theory Tech. 47 2075
[3] Smith D R, Padilla W J, Vier D C, Nemat-Nasser S C, Schultz S 2000 Phys. Rev. Lett. 84 4184
[4] Parimi P V, Lu W T, Vodo P, Srdhar S 2003 Nature 426 404
[5] Paremi P V, LuWT, Vodo P, Sokoloff J, Derov J S, Sridhar S 2004 Phys. Rev. Lett. 92 127401
[6] Moussa R , Foteinopoulou S , Zhang L , Tuttle G, Guven K, Ozbay E, Soukiolis C M 2005 Phys. Rev. B 71 085106
[7] Oktel M Ö, Müstecaplio?glu Ö E 2004 Phys. Rev. A 70 053806
[8] Thommen Q, Mandel P 2006 Phys. Rev. Lett. 96 053601
[9] Zhang H J, Niu Y P, Gong S Q 2007 Phys. Lett. A 363 497
[10] Zhen J, Liu Z D, Zeng F H, Fang H J 2008 Acta Phys. Sin. 57 7658 (in Chinese) [郑军, 刘正东, 曾福华, 方慧娟 2008 物理学报 57 7658]
[11] Ba N, Gao J W, Fan W, Wang D W, Ma Q R, Wang R, Wu J H 2008 Opt. Comm. 281 5566
[12] Kang H X, Kou J, Su X M, Gao J Y 2009 Acta Opt. Sin. 29 3498 (in Chinese) [康海霞, 寇军, 苏雪梅, 高锦岳 2009 光学学报 29 3498]
[13] Liu C X, Zhang J S, Liu J Y, Jin G 2009 Acta Phys. Sin. 58 5778(in Chinese) [刘春旭, 张继森, 刘俊业, 金光 2009 物理学报 58 5778]
[14] Zhao S C, Liu Z D, Wu Q X 2010 Opt. Comm. 283 3301