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Issue 20, 2005
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Mode-focusing in molecules by feedback-controlled shaping of femtosecond laser pulses

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Abstract

The feasibility of mode-selective excitation with broadband femtosecond laser pulses is demonstrated for toluene in liquid phase. A learning-loop optimal control scheme was applied to a stimulated Raman excitation process. Modifications of the phase shape of one of the exciting pulses resulted in dramatic changes of the mode distribution reflected in coherent anti-Stokes Raman spectra. An evolutionary algorithm guided the coherent excitation process to a selective enhancement or suppression of one or more vibrational modes over the complete coherence lifetime spanning several picoseconds. New ways of spectral filtering as well as exciting possibilities of mode-selective studying of chemical reaction dynamics are indicated.

Graphical abstract: Mode-focusing in molecules by feedback-controlled shaping of femtosecond laser pulses

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Publication details

The article was received on 06 Jul 2005, accepted on 24 Aug 2005 and first published on 08 Sep 2005


Article type: Paper
DOI: 10.1039/B509388K
Citation: Phys. Chem. Chem. Phys., 2005,7, 3574-3579
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    Mode-focusing in molecules by feedback-controlled shaping of femtosecond laser pulses

    J. Konradi, A. K. Singh and A. Materny, Phys. Chem. Chem. Phys., 2005, 7, 3574
    DOI: 10.1039/B509388K

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