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Femtosecond laser pulse control of electron transfer processes

J. Chem. Phys. 117, 636 (2002); doi:10.1063/1.1481856

Issue Date: 8 July 2002

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Tomás Mancal
Institut für Physik, Humboldt-Universität zu Berlin, Hausvogteiplatz 5-7, D-10117 Berlin, Germany

Ulrich Kleinekathöfer
Institut für Physik, Technische Universität, D-09107 Chemnitz, Germany

Volkhard May
Institut für Physik, Humboldt-Universität zu Berlin, Hausvogteiplatz 5-7, D-10117 Berlin, Germany
Laser-pulse guided ultrafast electron transfer (ET) is studied theoretically for different types of donor–acceptor systems. The pulse initiates an optical transition from the electronic ground state into an excited state and controls the ET. The computations concentrate on systems where (a) the excited state (donor) is coupled to an acceptor level and where (b) the ET proceeds as an internal conversion from the excited state to the ground state. For both examples the manifold of vibrational coordinates is mapped on a single reaction coordinate coupled to a dissipative reservoir of further coordinates. Utilizing the methods of dissipative quantum dynamics combined with the optimal control (OC) scheme, it is demonstrated that control fields really exist which drive the ET in the required manner. Various properties of the OC algorithm are discussed when applied to dissipative dynamics and a scheme is proposed to avoid pinning in a local extremum. ©2002 American Institute of Physics.
History: Received 25 February 2002; accepted 8 April 2002
Permalink: http://link.aip.org/link/?JCPSA6/117/636/1
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KEYWORDS and PACS

Keywords
PACS
  • 82.30.Fi
    Physical chemistry and chemical physics Specific chemical reactions; reaction mechanisms Ion–molecule, ion–ion, and charge-transfer reactions
  • 33.50.-j
    Molecular properties and interactions with photons Fluorescence and phosphorescence; radiationless transitions, quenching (intersystem crossing, internal conversion)
  • YEAR: 2002

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PUBLICATION DATA

ISSN:
0021-9606 (print)   1089-7690 (online)
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