Abstract
Theoretical and experimental data are presented on the propagation of picosecond pulses in weakly excited dye solutions. It is shown that the so called "coherence peak" of the induced dichroism observed at short delay times depends on the vibronic relaxation and the excited state absorption of the dye molecules. Interpretation of the experimental results is considerably facilitated at low excitation level. The vibrational relaxation time in the S1 state of phenoxazone 9 was measured to be τv=0.8±0.3 ps, 0.7±0.2 ps and 0.7±0.2 ps, respectively, for the solvents dioxane, solid polystyrene and CCl4. For rhodamine 6 G in ethanol we find τv=0.5±0.2 ps.
Original language | English |
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Pages (from-to) | 115-122 |
Number of pages | 8 |
Journal | Applied Physics B Photophysics and Laser Chemistry |
Volume | 27 |
Issue number | 3 |
DOIs | |
State | Published - Mar 1982 |
Externally published | Yes |
Keywords
- 33
- 42.65