Title :
Excited state isomerization of a cyanine dye investigated with femtosecond fluorescence up-conversion technique
Author :
Qihuang Gong ; Tieqiao Zhang ; Shufeng Wang ; Hong Yang
Author_Institution :
Dept. of Phys., Peking Univ., Beijing, China
fDate :
Aug. 30 1999-Sept. 3 1999
Abstract :
Excited state isomerization reaction of cyanine dye has been considered as a typical barrierless reaction. The experimental research based on the dye´s excited state dynamics has been performed by using several different time-resolved techniques, including excited state absorption, stimulated emission and fluorescence. In this report, employing femtosecond laser pulses, we studied the ultrafast time-resolved dynamics of fluorescence in solutions of cyanine dye 3,3´-di(3-sulfopropyl)thiacyanine triethylaimonium salt in water with and without doping semiconductor TiO/sub 2/ colloids.
Keywords :
dyes; excited states; fluorescence; isomerisation; optical harmonic generation; photochemistry; time resolved spectra; 3,3´-di(3-sulfopropyl)thiacyanine triethylammonium; SHG; barrierless reaction; cyanine dye; dye solutions; excited state isomerization; femtosecond fluorescence upconversion; semiconductor colloid doping; ultrafast time-resolved dynamics; Bridges; Counting circuits; Curve fitting; Fluorescence; Frequency conversion; Laboratories; Laser excitation; Optical pulses; Physics; Semiconductor lasers;
Conference_Titel :
Lasers and Electro-Optics, 1999. CLEO/Pacific Rim '99. The Pacific Rim Conference on
Conference_Location :
Seoul, South Korea
Print_ISBN :
0-7803-5661-6
DOI :
10.1109/CLEOPR.1999.811501
