Vibrational relaxation of dye molecules investigated by ultrafast induced dichroism

D. Reiser, A. Laubereau

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20 Scopus citations

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 languageEnglish
Pages (from-to)115-122
Number of pages8
JournalApplied Physics B Photophysics and Laser Chemistry
Volume27
Issue number3
DOIs
StatePublished - Mar 1982
Externally publishedYes

Keywords

  • 33
  • 42.65

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