Title :
Dark states in 4,4´-bis(diphenylamino)stilbene-based dendrimers studied by three-photon absorption
Author :
Drobizhev, M. ; Karotki, A. ; Rebane, A. ; Spangler, C.W.
Author_Institution :
Dept. of Phys., Montana State Univ., Bozeman, MT, USA
Abstract :
Summary form only given. In our recent study of 4,4´-bis(diphenylamino)stilbene-based dendrimers we have found that in contrast to parent, DPAS molecule, the dendrimers possess dark states, lying lower in energy than the first S/sub 0/ - S/sub 1/ transition. In three photon absorption (3PA) measurements, we use fluorescence method and femtosecond pulses, which give intrinsic values of 3PA cross-section. 3PA spectra were obtained by tuning an optical parametric amplifier.
Keywords :
dark states; fluorescence; high-speed optical techniques; multiphoton spectra; optical parametric amplifiers; optical tuning; organic compounds; time resolved spectra; 3PA cross-section; 4,4´-bis(diphenylamino)stilbene-based dendrimers; S/sub 0/ - S/sub 1/ transition; dark states; femtosecond pulses; fluorescence method; optical parametric amplifier tuning; three photon absorption measurements; three-photon absorption; Fluorescence; Optical parametric amplifiers; Organic compounds; Ultrafast optics;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2002. QELS '02. Technical Digest. Summaries of Papers Presented at the
Conference_Location :
Long Beach, CA, USA
Print_ISBN :
1-55752-708-3
DOI :
10.1109/QELS.2002.1031079
