Title :
NLO effect as a sensitive tool for determination of phase transition in C60-2-thioxo-1, 3-dithiole and in C60-TTF derivatives
Author :
Sahraoui, B. ; Fuks, I. ; Nunzi, J.-M. ; Berdowski, J. ; Kityk, I.V. ; Hudhomme, P. ; Gorgues, A.
Author_Institution :
POMA Lab., Angers Univ., France
Abstract :
Chemical modifications of C60 are interesting owing to potential improvement of their stability and processability, as well as their optical nonlinearities. This study concerns fullerenes functionalized with 2-thioxo-1, 3-dithiole (CA) and tetrathiafulvalene (TTF) cycloadducts in the solid state. Photoinduced nonlinear effects in these compounds are investigated using nonlinear optical techniques such as photoinduced optical second harmonic generation (PISHG), two-photon absorption (TPA) and linear electrooptics effects (Pockels effects) in order to determine phase transitions in the mentioned compounds
Keywords :
Pockels effect; fullerene compounds; high-pressure solid-state phase transformations; optical harmonic generation; organic compounds; two-photon processes; 2-thioxo-1, 3-dithiole cycloadducts; 213 K; 88 K; C60-2-thioxo-1, 3-dithiole; C60-TTF derivatives; NLO effect; Pockels effects; chemical modifications; linear electrooptics effects; nonlinear optical techniques; optical nonlinearities; phase transition; photoinduced nonlinear effects; photoinduced optical second harmonic generation; processability; stability; tetrathiafulvalene (TTF) cycloadducts; two-photon absorption; Chemical processes; Delay effects; Laboratories; Nonlinear optics; Optical harmonic generation; Optical pumping; Optical sensors; Physics; Stability; Temperature sensors;
Conference_Titel :
Transparent Optical Networks, 2001. Proceedings of 2001 3rd International Conference on
Conference_Location :
Cracow
Print_ISBN :
0-7803-7096-1
DOI :
10.1109/ICTON.2001.934767
