Daisuke BARADA^1,*, Takashi FUKUDA^2,3, Masahide ITOH¹ and Toyohiko YATAGAI^1,2

¹Institute of Applied Physics, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8573, Japan
²Special Research Project on Nanoscience, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8573, Japan
³Photonics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan

(Received September 30, 2004; Accepted May 29, 2005)

The time evolution of photoinduced surface relief grating formation on azobenzene polymer films is analyzed by particle method for fluid mechanics. The surface relief grating is grown by using two beams interference with various polarization states numerically and compared with experimental results. The force acted on the dipole by electromagnetic field and surface force are considered as the driving force for photoinduced mass transport. The improved surface tension model is proposed in order to calculate curvature coefficient. The numerical results are coincided with experimental results qualititatively.

Key words: azobenzene polymer, photoinduced surface relief, surface relief grating, particle method, electromagnetic-induced particle transport method, viscous fluid model, electromagnetic force

^*E-mail address: barada@optlab2.bk.tsukuba.ac.jp