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Title: Intense laser-controlled quenching of molecular fragmentation

Abstract

We show how efficient control can be exerted on molecular dissociation by adiabatic shaping of an intense, single laser pulse in a very simplified way, involving a few parameters (e.g., peak amplitude, carrier-wave, and modulation phases and frequencies). The strategy takes advantage of an appropriate combination of basic multiphoton mechanisms: bond softening (BS), vibrational trapping (VT), and dynamical dissociation quenching (DDQ). The resulting stabilization enhancement with respect to dissociation may increase up to a factor of 5, while simultaneously inhibiting the BS mechanism and reenforcing the VT mechanism, using DDQ. The photodissociation of H{sub 2}{sup +} submitted to a uv-visible field modulated by an IR periodic envelope, on which the consequences of a DDQ-type mechanism has recently experimentally been checked, is taken as an illustrative example.

Authors:
 [1];  [2];  [3];  [4]
  1. Departement de Chimie, Universite Laval, Quebec, Quebec G1K 7P4 (Canada)
  2. (France)
  3. Departement de Chimie, Universite Laval, Quebec, Quebec, Canada G1K 7P4 (Canada)
  4. Laboratoire de Photophysique Moleculaire du CNRS, Batiment 210, Campus d'Orsay 91405, Orsay, Cedex (France)
Publication Date:
OSTI Identifier:
20982142
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 75; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevA.75.023404; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; AMPLITUDES; CARRIERS; DISSOCIATION; FRAGMENTATION; HYDROGEN IONS 2 PLUS; LASER RADIATION; MODULATION; MULTI-PHOTON PROCESSES; PERIODICITY; PHOTOLYSIS; PHOTON-MOLECULE COLLISIONS; PULSES; QUENCHING; STABILIZATION; TRAPPING; VIBRATIONAL STATES

Citation Formats

Lefebvre, C., Laboratoire de Photophysique Moleculaire du CNRS, Batiment 210, Campus d'Orsay 91405, Orsay, Cedex, Nguyen-Dang, T. T., and Atabek, O. Intense laser-controlled quenching of molecular fragmentation. United States: N. p., 2007. Web. doi:10.1103/PHYSREVA.75.023404.
Lefebvre, C., Laboratoire de Photophysique Moleculaire du CNRS, Batiment 210, Campus d'Orsay 91405, Orsay, Cedex, Nguyen-Dang, T. T., & Atabek, O. Intense laser-controlled quenching of molecular fragmentation. United States. doi:10.1103/PHYSREVA.75.023404.
Lefebvre, C., Laboratoire de Photophysique Moleculaire du CNRS, Batiment 210, Campus d'Orsay 91405, Orsay, Cedex, Nguyen-Dang, T. T., and Atabek, O. Thu . "Intense laser-controlled quenching of molecular fragmentation". United States. doi:10.1103/PHYSREVA.75.023404.
@article{osti_20982142,
title = {Intense laser-controlled quenching of molecular fragmentation},
author = {Lefebvre, C. and Laboratoire de Photophysique Moleculaire du CNRS, Batiment 210, Campus d'Orsay 91405, Orsay, Cedex and Nguyen-Dang, T. T. and Atabek, O.},
abstractNote = {We show how efficient control can be exerted on molecular dissociation by adiabatic shaping of an intense, single laser pulse in a very simplified way, involving a few parameters (e.g., peak amplitude, carrier-wave, and modulation phases and frequencies). The strategy takes advantage of an appropriate combination of basic multiphoton mechanisms: bond softening (BS), vibrational trapping (VT), and dynamical dissociation quenching (DDQ). The resulting stabilization enhancement with respect to dissociation may increase up to a factor of 5, while simultaneously inhibiting the BS mechanism and reenforcing the VT mechanism, using DDQ. The photodissociation of H{sub 2}{sup +} submitted to a uv-visible field modulated by an IR periodic envelope, on which the consequences of a DDQ-type mechanism has recently experimentally been checked, is taken as an illustrative example.},
doi = {10.1103/PHYSREVA.75.023404},
journal = {Physical Review. A},
number = 2,
volume = 75,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2007},
month = {Thu Feb 15 00:00:00 EST 2007}
}