[1] N. I. Landy, S. Sajuyigbe, J. J. Mock, D. R. Smith, and W. J. Padilla, Phys. Rev. Lett. 100, 207402 (2008).
[2] J. Yang, S. Ruan, and M. Zhang, Chin. Opt. Lett. 6, 29 (2008).
[3] K. Yang, G. Zhao, C. Liang, and L. Wu, Chinese J. Lasers (in Chinese) 36, 2853 (2009).
[4] H. Tao, N. I. Landy, C. M. Bingham, X. zhang, R. D. Averitt, and W. J. Padilla, Opt. Express 16, 7181 (2008).
[5] H. Tao, C. M. Bingham, A. C. Strikwerda, D. Pilon, D. Shrekenhamer, N. I. Landy, K. Fan, X. Zhang, W. J. Padilla, and R. D. Averitt, Phys. Rev. B 78, 241103(R) (2008).
[6] Y. Avitzour, Y. A. Urzhumov, and G. Shvets, Phys. Rev. B 79, 045131 (2009).
[7] N. I. Landy, C. M. Bingham, T. Tyler, N. Jokerst, D. R. Smith, and W. J. Padilla, Phys. Rev. B 79, 125104 (2009).
[8] Q. Wen, H. Zhang, Y. Xie, Q. Yang, and Y. Liu, Appl. Phys. Lett. 95, 241111 (2009).
[9] Q. Wen, Y. Xie, H. Zhang, Q. Yang, Y. Li, and Y. Liu, Opt. Express 17, 20256 (2009).
[10] Q. Wen, H. Zhang, Y. Xie, Q. Yang, Y. Li, Chinese J. Opt. Appl. Opt. 3, 70 (2010).
[11] Q. Wen, Y. Xie, H. Zhang, Q. Yang, and Y. Li, Liu, Chinese J. Opt. Appl. Opt. 3, 79 (2010).
[12] D. Bouhafs, A. Moussi, A. Chikouche, and J. M. Ruiz, Sol. Energ. Mat. Sol. C 52, 79 (1998).
[13] D. Schurig, J. J. Mock, J. B. Justice, S. A. Cummer, J. B. Pendry, A. F. Starr, and D. R. Smith, Science 314, 977 (2006).
