Control of Chemical Reactions by Feedback-Optimized Phase-Shaped Femtosecond Laser Pulses

  • A. Assion
    Physikalisches Institut, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
  • T. Baumert
    Physikalisches Institut, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
  • M. Bergt
    Physikalisches Institut, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
  • T. Brixner
    Physikalisches Institut, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
  • B. Kiefer
    Physikalisches Institut, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
  • V. Seyfried
    Physikalisches Institut, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
  • M. Strehle
    Physikalisches Institut, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
  • G. Gerber
    Physikalisches Institut, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.

説明

<jats:p> Tailored femtosecond laser pulses from a computer-controlled pulse shaper were used to optimize the branching ratios of different organometallic photodissociation reaction channels. The optimization procedure is based on the feedback from reaction product quantities in a learning evolutionary algorithm that iteratively improves the phase of the applied femtosecond laser pulse. In the case of CpFe(CO) <jats:sub>2</jats:sub> Cl, it is shown that two different bond-cleaving reactions can be selected, resulting in chemically different products. At least in this case, the method works automatically and finds optimal solutions without previous knowledge of the molecular system and the experimental environment. </jats:p>

収録刊行物

  • Science

    Science 282 (5390), 919-922, 1998-10-30

    American Association for the Advancement of Science (AAAS)

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