Optimally controlled five-laser infrared multiphoton dissociation of HF

Matjaž Kaluža, James Muckerman, Peter Gross, Herschel Rabitz

Research output: Contribution to journalArticle

76 Citations (Scopus)

Abstract

Simulations of the quantum dynamics of the HF molecule immersed in a field of five overlapping, intense, linearly polarized, infrared laser pulses of subpicosecond duration are performed. The HF molecule, initially in its ground state, is modeled as a rotating oscillator interacting with a classical laser field via electric dipole interaction. Realistic potential and dipole functions are used. Optimal overlaps of the five laser pulses, as well as the optimal carrier frequencies of the laser pulses, are found which maximize the HF dissociation yield. A maximal yield of 45% in a single combined pulse is achieved using the best available potential and dipole moment functions. The optimal infrared multiphoton dissociation pathway for the HF molecule includes a series of the Δυu=1 vibrational-rotational transitions followed by a series of Δυ≥2 vibrational-rotational transitions. The latter is necessary as a consequence of the vanishing Δυ=1 transition moment around υ=12. In the Δυ=1 regime, both P and R branch transitions are found to be important. The angular distribution of the dissociative flux is computed. Robustness of the results with respect to changes in the interatomic potentials, dipole functions and reduced mass, as well as to changes in laser pulse parameters (carrier frequencies, timings, phases, field amplitudes, and pulse durations) is investigated.

Original languageEnglish
Pages (from-to)4211-4228
Number of pages18
JournalJournal of Chemical Physics
Volume100
Issue number6
Publication statusPublished - 1994

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Infrared lasers
infrared lasers
Laser pulses
dissociation
pulses
Molecules
carrier frequencies
lasers
Angular distribution
Dipole moment
dipoles
moments
molecules
Ground state
electric dipoles
Fluxes
Infrared radiation
pulse duration
dipole moments
angular distribution

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Optimally controlled five-laser infrared multiphoton dissociation of HF. / Kaluža, Matjaž; Muckerman, James; Gross, Peter; Rabitz, Herschel.

In: Journal of Chemical Physics, Vol. 100, No. 6, 1994, p. 4211-4228.

Research output: Contribution to journalArticle

Kaluža, M, Muckerman, J, Gross, P & Rabitz, H 1994, 'Optimally controlled five-laser infrared multiphoton dissociation of HF', Journal of Chemical Physics, vol. 100, no. 6, pp. 4211-4228.
Kaluža, Matjaž ; Muckerman, James ; Gross, Peter ; Rabitz, Herschel. / Optimally controlled five-laser infrared multiphoton dissociation of HF. In: Journal of Chemical Physics. 1994 ; Vol. 100, No. 6. pp. 4211-4228.
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