[1] H. Petek and S. Ogawa, Prog. Surf. Sci. 56, 239 (1997).
[2] H. Nienhaus, Surf. Sci. Rep. 45, 1 (2002).
[3] P. M. Echenique, R. Berndt, E. V. Chulkov, Th. Fauster, A. Goldmann, and U. Hofer, Surf. Sci. Rep. 52, 219(2004).
[4] R. W. Robinett, Phys. Rep. 392, 1 (2004).
[5] L.-H. Wen, M. Liu, L.-B. Kong, A.-X. Chen, and M.-S. Zhan, Chin. Phys. 14, 690 (2005).
[6] S. Ghosh, A. Chiruvelli, J. Banerji, and P. K. Panigrahi, Phys. Rev. A 73, 013411 (2006).
[7] U. Hofer, I. L. Shumay, Ch. Reub, U. Thomann, W. Wallauer, and Th. Fauster, Science 277, 1480 (1997).
[8] U. Hofer, Appl. Phys. B 68, 383 (1999).
[9] B. Bahrim, B. Makarenko, and J. W. Rabalais, Surf. Sci. 594, 62 (2005).
[10] D.-H. Wang and Y. J. Yu, Chin. Phys. 17, 1231 (2008).
[11] A. D. Peters and J. B. Delos, Phys. Rev. A 47, 3020 (1993).
[12] Z. Y. Liu and D. H.Wang, Phys. Rev. A 55, 4605 (1997).
[13] G. Yang, Y. Zheng, and X. Chi, J. Phys. B 39, 1855 (2006).
[14] A. Afaq and M. L. Du, J. Phys. B 40, 1309 (2007).
[15] D. Wang, Eur. Phys. J. D 45, 179 (2007).
[16] D. Wang, Y. Yu, and H. Wang, Chin. Opt. Lett. 7, 176 (2009).