Absorptive and dispersive responses in a two-level molecule with vibronic coupling: Permanent dipole moments effects

J. L. Paz, Marcos Loroño, Alberto Garrido Schaeffer, Lenin A. González-Paz, Edgar Marquez, Joan Vera-Villalobos, José R. Mora, Ysaias J. Alvarado

Research output: Contribution to journalArticlepeer-review

Abstract

Profiles of the nonlinear optical properties of a two-level system interacting with a thermal reservoir in Four-wave mixing have been studied. The model is a generalization of the conventional two-level approach, it includes a simplified description of the molecular structure and the explicit consideration of permanent dipole moment. The Born-Oppenheimer electronic energy curves consist of two intercrossing harmonic oscillators potentials, displaced both in their equilibrium minimum position and energy. The critical quantities for this analysis are the transition and permanent dipole moments. Our results show how both nonlinear absorption and dispersion responses, are affected by the vibronic coupling.

Original languageEnglish
Article number138885
JournalChemical Physics Letters
Volume779
DOIs
StatePublished - 16 Sep 2021

Bibliographical note

Funding Information:
This work was supported by the National Science Foundation and the Office of Naval Research. We gratefully acknowledge stimulating

Publisher Copyright:
© 2021 Elsevier B.V.

Keywords

  • Four wave mixing
  • Intramolecular coupling
  • Nonlinear optical properties
  • Permanent dipole moments

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