Realization of population inversion under nonadiabatic conditions induced by the coupling between vibrational modes via Raman fields

Vishesha Patel, Svetlana A. Malinovskaya

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We study the effects of coupling between molecular vibrational modes attendant the excitation of Raman transitions. Raman active vibrational modes are described by two two-level systems (TLSs) with nondegenerate ground states. The population inversion is investigated under the condition of zero relative phase between initially populated states. We use two ultrafast laser pulses for the pump and the Stokes fields that have chirps the same in the magnitude and opposite in the sign. Within this model, the coupling induces nonadiabatic effects leading to a diverse population distribution. By introducing the time delay between the Stokes and the pump pulse, we realized a complete population transfer in both coupled TLSs. We demonstrated the population inversion in a more generic case of the averaged initial relative phase.

Original languageEnglish
Pages (from-to)3739-3743
Number of pages5
JournalInternational Journal of Quantum Chemistry
Volume112
Issue number24
DOIs
StatePublished - 15 Dec 2012

Keywords

  • Raman transitions
  • coupling between vibrational modes via external fields
  • population inversion
  • ultrafast chirped laser pulse

Fingerprint

Dive into the research topics of 'Realization of population inversion under nonadiabatic conditions induced by the coupling between vibrational modes via Raman fields'. Together they form a unique fingerprint.

Cite this