[1] Boyd R W 1992 Nonlinear Optics (San Diego: Academic)

[2] Schmidt H and Imamoglu A 1996 Opt. Lett. 21
1936

[3] Imamoglu A, Schmidt H, Woods G and Deutsch M 1997
Phys. Rev. Lett. 79 1467

Harris S E and Yamamoto Y 1998 Phys. Rev. Lett.
81 3611

Harris S E and Hau L V 1999 Phys. Rev. Lett. 82
4611

[4] Paspalakis E and Knight P L 2002 J. Opt. B:
Quantum Semiclass. Opt. 4 S372

Shpaisman H, Wilson-Gordon A D and Friedmann H 2004
Phys. Rev. A 70 063814

[5] Merriam A J, Sharpe S J, Shverdin M, Manuszak D, Yin G Y
and Harris S E 2000 Phys. Rev. Lett. 84 5308

Li Y and Xiao M 1998 Opt. lett. 21 1064

[6] Wu Y, Payne M G, Hagley E W and Deng L 2004 Opt.
Lett. 29 2294

Wu Y and Yang X 2004 Phys. Rev. A 70 053818

[7] Niu Y, Li R and Gong S 2005 Phys. Rev. A 71
043819

[8] Jain M, Xia H, Yin G Y, Merriam A J and Harris S E 1996
Phys. Rev. Lett. 77 4326

[9] Joshi A and Xiao M 2005 Phys. Rev. A 72 062319

Semi\~{ao F L and Vidiella-Barranco A 2005 Phys. Rev.
A 72 064305

[10] Ottaviani C, Rebic S, Vitali D and Tombesi P 2006
Eur. Phys. J. D 40 281

[11] Niu Y, Li R, Gong S and Liang X 2005 Opt. Lett.
30 3371

Sun H, Niu Y P and Gong S Q 2007 Chin. Phys. 16
0429

[12] Sun H, Gong S, Niu Y, Jin S, Li R and Xu Z 2006
Phys. Rev. B 74 155314

[13] Wang H, Goorskey D and Xiao M 2001 Phys. Rev. Lett.
87 073601

[14] Ficek Z, Seke J, Soldatov A V, Adam G and Bogolubov N N
2003 Opt. Commun. 217 299

[15] Keitel C H 1998 Phys. Rev. A 57 1412

[16] Yoon T H, Chung M S and Lee H W 1999 Phys. Rev. A
60 2547

Guo H J, Hu X M, Li J Y, Li X X, Shi W X and X Q 2006
Chin. Phys. 15 0383

[17] Hu X, Xu Q, Li J, Li X, Shi W and Xiu Z 2006 Opt.
Commun. 260 196

[18] Zhang J, Xu J, Hernandez G, Hu X and Zhu Y 2007
Phys. Rev. A 75 043810

[19] Hu X, Cheng G, Zhou J, Li X and Dan D 2005 Opt.
Commun. 249 543

[20] Niu Y and Gong S 2006 Phys. Rev. A 73 053811

[21] Li P, Nakajima T and Ning X 2006 Phys. Rev. A
74 043408

[22] Wanare H 2006 Phys. Rev. Lett. 96 183601

[23] Kim H, Park J R and Lee H W 2000 J. Phys. B
33 1703