[1] Shelby R A, Smith D R, Schultz S. Science, 2001, 292: 77.
[2] Liu Z, Lee H, Xiong Y, et al. Science, 2007, 315: 1686.
[3] Zheludev N I. Science, 2010, 328: 582.
[4] Cooper K B, Dengler R Llombart, J N B, et al. IEEE Trans. Terahertz Sci. Technol., 2011, 1: 169.
[5] Wu X, Quan B, Pan X, et al. Biosens. Bioelectron, 2013, 42: 626.
[6] Liang L J, Jin B B, Wu J B. et al. Appl. Phys. B-Lasers. O, 2013, 113: 285.
[7] Danylov A A, Goyette T M, Waldman J. et al. Opt. Express, 2010, 18: 16264.
[8] Chen J, Cheng Q, Zhao J. et al. Progress In Electromagnetics Research, 2014, 146: 71.
[10] Cao T, Wei C W, Simpson R E, et al. Science Reports, 2014, 4: 1.
[11] Wang B X, Wang L L, et al. J. Lightwave Technol., 2014, 32: 1183.
[12] Grady N K, Heyes J E, Chowdhury D R, et al. Science, 2013, 340: 1304.
[13] Wang F W, Gong S X, Zhang S. et al. Progress in Electromagnetics Research, 2012, 25: 2487.
[14] Yang X M, Zhou X Y, Cheng Q, et al. Opt. Lett., 2010, 35: 808.
[15] Cui T J, Qi M Q, Wan X, et al. Light: Science & Applications, 2014, 3: e218.
[16] Wang K, Zhao J, Cheng Q, et al. Scientific Reports, 2014, 4: 5395.
[17] Li Y F, Zhang J Q, Qu S B, et al. Appl. Phys. Lett., 2014, 104: 221110.
[18] Wang F W, Gong S X, Zhang S, et al. Progress In Electromagnetics Research, 2012, 25: 2487.
[19] Yang H H, Cao X Y, Gao J, et al. Progress in Electromagnetics Research, 2013, 33: 31.
[20] Iwaszczuk K, Strikwerda A C, Fan K, et al. Opt. Express, 2011, 20: 635.