title: Environment-dependent ultrafast photoisomerization dynamics in azo dye.
abstract: Azoaromatic dyes have been extensively investigated over the past decade due to their potential use in a variety of optical devices that exploit their ultrafast photoisomerization processes. Among the azoaromatic dyes, Disperse Red 19 is a commercially available azobenzene nonlinear optical chromophore with a relatively high ground-state dipole moment. In the present study, we used ultrafast time-resolved spectroscopy to clarify the dynamics of a push-pull substituted azobenzene dye. Solution and film samples exhibited different ultrafast dynamics, indicating that the molecular environment affects the photoisomerization dynamics of the dye.
authors.affiliation: Department of Electrophysics, National Chiao-Tung University, Hsinchu, Taiwan, Republic of China.
authors.forename: Chun-Chih
authors.initials: CC
authors.lastname: Hsu
authors.forename: Yu-Ting
authors.initials: YT
authors.lastname: Wang
authors.forename: Atsushi
authors.initials: A
authors.lastname: Yabushita
authors.forename: Chih-Wei
authors.initials: CW
authors.lastname: Luo
authors.forename: Yi-Nan
authors.initials: YN
authors.lastname: Hsiao
authors.forename: Shiuan-Huei
authors.initials: SH
authors.lastname: Lin
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Kobayashi