J. Phys. Colloques
Volume 46, Numéro C7, Octobre 1985Fifth International Conference on Dynamical Processes in the Excited States of Solids / Dynamique des Etats Excités dans les Solides
|Page(s)||C7-511 - C7-515|
J. Phys. Colloques 46 (1985) C7-511-C7-515
ULTRAFAST DEPHASING TIME MEASUREMENT IN CRESYL FAST VIOLET DOPED CELLULOSE BY PHOTON ECHOES WITH TEMPORALLY INCOHERENT LIGHTH. Nakatsuka1, M. Fujiwara2 et R. Kuroda2
1 Institute of Applied Physics, University of Tsukuba, Sakura, Ibaraki 305, Japan
2 Department of Physics, Faculty of Science, Kyoto University, Kyoto 606, Japan
Photon echoes with broad spectrum nanosecond laser pulses have been used to measure a femtosecond dephasing time (homogeneous transverse relaxation time) T2 of the S0↔1 transition of Cresyl Fast Violet molecules in a cellulose film. The measured T2 was much shorter at a shorter wavelength 5940A than that at a longer wavelength 6250A near the band edge.