[1] M. Bayindir, B. Temelkuran, and E. Ozbay, Appl. Phys. Lett. 77, 3902 (2000).
[2] A. Adibi, R. Lee, Y. Xu, A. Yariv, and A. Scherer, Electron. Lett. 36, 1376 (2000).
[3] H. Li, G. Gu, H. Chen, and S. Zhu, Appl. Phys. Lett. 74, 3260 (1999).
[4] L. Wang, Z. Wang, Y. Wu, L. Chen, S. Wang, X. Chen, and W. Lu, J. Appl. Phys. 95, 424 (2004).
[5] Z. Wang, L. Wang, Y. Wu, and L. Chen, Appl. Phys. Lett. 84, 1629 (2004).
[6] Z. Li and Z. Zhang, Phys. Rev. B 62, 1516 (2000).
[7] Y. Fink, J. Winn, S. Fan, C. Chen, J. Michel, J. Joannopoulos, and E. Thomas, Science 82, 1679 (1998).
[8] J. Li, L. Zhou, C. Chan, and P. Sheng, Phys. Rev. Lett. 90, 083901 (2003).
[9] H. Jiang, H. Chen, H. Li, Y. Zhang, J. Zi, and S. Zhu, Phys. Rev. E 69, 066607 (2004).
[10] I. Shadrivov, A. Sukhorukov, and Y. Kivshar, Phys. Rev. Lett. 95, 193903 (2005).
[11] C. Fu, Z. Zhang, and P. First, Appl. Opt. 44, 3716 (2005).
[12] J. Pendry, Nature 423, 22 (2003).
[13] G. Eleftheriades, A. Iyer, and P. Kremer, IEEE Trans. Microwave Theory Tech. 50, 2702 (2002).