[1] T. W. Ebbesen, H. J. Lezec, H. F. Ghaemi, T. Thio, and P. A. Wolff, Nature 391, 667 (1998).

[2] H. J. Lezec, A. Degiron, E. Devaux, R. A. Linke, L. Martin-Moreno, F. J. Garcia-Vidal, and T. W. Ebbesen, Science 297, 820 (2002).

[3] B. Wang and G. P. Wang, Opt. Lett. 29, 1992 (2004).

[4] Z. Sun, Appl. Phys. Lett. 89, 261119 (2006).

[5] H. Qin, X. Li, and S. Shen, Chin. Opt. Lett. 6, 149 (2008).

[6] F. J. Garcia-Vidal, L. Martin-Moreno, H. J. Lezec, and T. W. Ebbesen, Appl. Phys. Lett. 83, 4500 (2003).

[7] S. I. Bozhevolnyi, V. S. Volkov, E. Devaux, J.-Y. Laluet, and T. W. Ebbesen, Nature 440, 508 (2006).

[8] X. Hong, W. Xu, X. Li, C. Zhao, and X. Tang, Chin. Opt. Lett. 7, 74 (2009).

[9] E. Ozbay, Science 311, 189 (2006).

[10] W. L. Barnes, A. Dereux, and T. W. Ebbesen, Nature 424, 824 (2003).

[11] J. A. Porto, L. Martin-Moreno, and F. J. Garcia-Vidal, Phys. Rev. B 70, 081402 (2004).

[12] C. Min, P. Wang, X. Jiao, Y. Deng, and H. Ming, Opt. Express 15, 9541 (2007).

[13] I. I. Smolyaninov, Phys. Rev. Lett. 94, 057403 (2005).

[14] G. A. Wurtz, R. Pollard, and A. V. Zayats, Phys. Rev. Lett. 97, 057402 (2006).

[15] C. Min, P. Wang, C. Chen, Y. Deng, Y. Lu, H. Ming, T. Ning, Y. Zhou, and G. Yang, Opt. Lett. 33, 869 (2008).

[16] J. A. Porto, F. J. Garcia-Vidal, and J. B. Pendry, Phys. Rev. Lett. 83, 2845 (1999).

[17] S. A. Maier, Plasmonics: Fundamentals and Application (Springer, Berlin, 2007).

[18] H. Raether, Surface Plasmons on Smooth and Rough Surfaces and on Gratings (Springer, Berlin, 1988).

[19] E. D. Palik, Handbook of Optical Constants of Solids (Academic Press, New York, 1998).

[20] R. W. Ziolkowski and J. B. Judkins, J. Opt. Soc. Am. B 11, 1565 (1994).

[21] R. W. Boyd, Nonlinear Optics (2nd edn.) (Academic Press, San Diego, 2003).

[22] K. Furusawa, K. Takahashi, H. Kumagai, K. Midorikawa, and M. Obara, Appl. Phys. A 69, S359 (1999).