[1] Home N C R, Ramanujam P S and Hvilsted S 1996 Appl.
Opt. 35 4622

[2] Wang C, Fei H, Yang Y, Wei Z, Qiu Y and Chen Y 1999
Opt. Commun. 159 58

[3] Okano K, Shishido A and Ikeda T 2006 Adv. Mater.
18 523

[4] Ikeda T and Tsutsumi O 1995 Science 268 1873

[5] Wang C, Fei H, Xia J, Yang Y, Wei Z, Yang Q and Sun G 1999
Appl. Phys. B 68 1117

[6] Todorov T, Nikolova L and Tomova N 1984 Appl. Opt.
23 4309

[7] Pan X, Wang C, Xu H, Wang C and Zhang X 2007 Appl.
Phys. B 86 693

[8] Pan X, Wang C S, Wang C Y and Zhang X Q 2008 Appl.
Opt. 47 93

[9] Rochon P, Gosselin J, Natansohn A and Xie S 1992
Appl. Phys. Lett. 60 4

[10] Yang J, Ming H, Zhang J Y, Wang P, Lang J J, Lu Y H, Liu
J and Zhang Q J 2003 Chin. Phys. Lett. 20 3454

[11] Xu H T, Wang C S, Pan X, Zhang X Q, Wang C Y and Sun C Y
2007 Chin. Phys. Lett. 24 450

[12] Natansohn A, Rochon P, P\'{ezolet M, Audet P, Brown D
and To S 1994 Macromoles 27 2580

[13] Minabe J and Kawano K 2006 Jpn. J. Appl. Phys.
45 4123

[14] Sekkat Z, Wood J, Aust E F, Knoll W, Volksen W and Miller
R D 1996 J. Opt. Soc. Am. B 13 1713

[15] Zilker S J, Huber M R, Bieringer T and Haarer D 1999
Appl. Phys. B 68 893

[16] Minabe J, Kawano K and Nishikata Y 2002 Appl. Opt.
41 700

[17] Ramanujam P S 2003 Opt. Lett. 28 2375

[18] Tian Y, Xie J, Wang C, Zhao Y and Fei H 1999
Polymer 40 3835

[19] Zebger I, Rutloh M, Hoffmann U, Stumpe J, Siesler H W and
Hvilsted S 2003 Macromoles 36 9373

[20] Date R W, Fawcett A H, Geue T, Haferkorn J, Malcolm R K
and Stumpe J 1998 Macromoles 31 4935

[21] Sapich B, Vix A B E, Rabe J P and Stumpe J 2005
Macromoles 38 10480

[22] Buffeteau T, Natansohn A, Rochon P and Pezolet M 1996
Macromoles 29 8783