Absorptive and dispersive processes in a two-level molecule with intramolecular coupling and non-zero permanent dipole moment

M. Garcia-Sucre, E. Squitieri, J. L. Paz, Vladimiro Mujica

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We investigate linear and non-linear absorptive and dispersive properties for a homogeneously broadened molecular two-level system including simplified versions of vibrational structure and intramolecular coupling. The Born-Oppenheimer electronic energy curves for this simplified molecular model consist of two intercrossing harmonic oscillators potentials with different force constants. These electronic states are coupled and inclusion of the intramolecular coupling within a vibronic model renders the corresponding coupled states. We have analysed the influence of the intramolecular coupling parameters on the optical response of the system up to third-order in the external field. The critical quantities for this analysis are the transition and permanent dipole moments (both in magnitude and relative sign) which depend strongly on the intramolecular coupling. Some simple exact results are derived for the important case of exact degeneracy. Finally, the relevance of the optical response of the change in force constants associated with the two uncoupled states is examined.

Original languageEnglish (US)
Pages (from-to)4945-4972
Number of pages28
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume27
Issue number20
DOIs
StatePublished - 1994
Externally publishedYes

Fingerprint

dipole moments
molecules
electronics
harmonic oscillators
inclusions
curves
energy

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy(all)

Cite this

Absorptive and dispersive processes in a two-level molecule with intramolecular coupling and non-zero permanent dipole moment. / Garcia-Sucre, M.; Squitieri, E.; Paz, J. L.; Mujica, Vladimiro.

In: Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 27, No. 20, 1994, p. 4945-4972.

Research output: Contribution to journalArticle

@article{0a2a275b4dee4a429dccfdfa49e604e6,
title = "Absorptive and dispersive processes in a two-level molecule with intramolecular coupling and non-zero permanent dipole moment",
abstract = "We investigate linear and non-linear absorptive and dispersive properties for a homogeneously broadened molecular two-level system including simplified versions of vibrational structure and intramolecular coupling. The Born-Oppenheimer electronic energy curves for this simplified molecular model consist of two intercrossing harmonic oscillators potentials with different force constants. These electronic states are coupled and inclusion of the intramolecular coupling within a vibronic model renders the corresponding coupled states. We have analysed the influence of the intramolecular coupling parameters on the optical response of the system up to third-order in the external field. The critical quantities for this analysis are the transition and permanent dipole moments (both in magnitude and relative sign) which depend strongly on the intramolecular coupling. Some simple exact results are derived for the important case of exact degeneracy. Finally, the relevance of the optical response of the change in force constants associated with the two uncoupled states is examined.",
author = "M. Garcia-Sucre and E. Squitieri and Paz, {J. L.} and Vladimiro Mujica",
year = "1994",
doi = "10.1088/0953-4075/27/20/013",
language = "English (US)",
volume = "27",
pages = "4945--4972",
journal = "Journal of Physics B: Atomic, Molecular and Optical Physics",
issn = "0953-4075",
publisher = "IOP Publishing Ltd.",
number = "20",

}

TY - JOUR

T1 - Absorptive and dispersive processes in a two-level molecule with intramolecular coupling and non-zero permanent dipole moment

AU - Garcia-Sucre, M.

AU - Squitieri, E.

AU - Paz, J. L.

AU - Mujica, Vladimiro

PY - 1994

Y1 - 1994

N2 - We investigate linear and non-linear absorptive and dispersive properties for a homogeneously broadened molecular two-level system including simplified versions of vibrational structure and intramolecular coupling. The Born-Oppenheimer electronic energy curves for this simplified molecular model consist of two intercrossing harmonic oscillators potentials with different force constants. These electronic states are coupled and inclusion of the intramolecular coupling within a vibronic model renders the corresponding coupled states. We have analysed the influence of the intramolecular coupling parameters on the optical response of the system up to third-order in the external field. The critical quantities for this analysis are the transition and permanent dipole moments (both in magnitude and relative sign) which depend strongly on the intramolecular coupling. Some simple exact results are derived for the important case of exact degeneracy. Finally, the relevance of the optical response of the change in force constants associated with the two uncoupled states is examined.

AB - We investigate linear and non-linear absorptive and dispersive properties for a homogeneously broadened molecular two-level system including simplified versions of vibrational structure and intramolecular coupling. The Born-Oppenheimer electronic energy curves for this simplified molecular model consist of two intercrossing harmonic oscillators potentials with different force constants. These electronic states are coupled and inclusion of the intramolecular coupling within a vibronic model renders the corresponding coupled states. We have analysed the influence of the intramolecular coupling parameters on the optical response of the system up to third-order in the external field. The critical quantities for this analysis are the transition and permanent dipole moments (both in magnitude and relative sign) which depend strongly on the intramolecular coupling. Some simple exact results are derived for the important case of exact degeneracy. Finally, the relevance of the optical response of the change in force constants associated with the two uncoupled states is examined.

UR - http://www.scopus.com/inward/record.url?scp=0028532355&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0028532355&partnerID=8YFLogxK

U2 - 10.1088/0953-4075/27/20/013

DO - 10.1088/0953-4075/27/20/013

M3 - Article

VL - 27

SP - 4945

EP - 4972

JO - Journal of Physics B: Atomic, Molecular and Optical Physics

JF - Journal of Physics B: Atomic, Molecular and Optical Physics

SN - 0953-4075

IS - 20

ER -