Four-wave mixing spectroscopy of two-level system with intramolecular coupling: The effect of relaxation times

T. Cusati, J. L. Paz, E. Squitieri, M. C. Salazar, A. J. Hernandez, V. Mujica

Research output: Contribution to journalArticle

1 Scopus citations


A study has been made of the effect of relaxation times on the four-wave mixing (FWM) signal response in frequency space for a two-level system where intramolecular coupling is explicitly taken into account within a vibronic model. The model is a generalization of the conventional two-level approach in that it includes a simplified description of the molecular structure and the explicit consideration of permanent dipole moments. Significant changes in both the intensity and shape of the peaks of the FWM spectrum are observed, due mainly to changes in the ratio between the longitudinal and transversal relaxation times, T1/T2.

Original languageEnglish (US)
Pages (from-to)1587-1593
Number of pages7
JournalMolecular Physics
Issue number10
StatePublished - May 20 2002
Externally publishedYes


ASJC Scopus subject areas

  • Biophysics
  • Molecular Biology
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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