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Selective bond breakage within the HOD molecule using optimized femtosecond ultraviolet laser pulses

Ashwani Kumar Tiwari, Klaus B. Møller, and Niels E. Henriksen

Phys. Rev. A: At. Mol. Opt. Phys., vol: 78, num: 6, 4 pages, published: 16 December 2008, 065402

Abstract: With the HOD molecule initially in its vibrational ground state, we theoretically analyze the laser-induced control of the OD/OH branching ratio D+OHHODH+OD in the first absorption band. In the weak-field limit, any form of UV-pulse shaping control leads to a branching ratio larger than ~2. We obtain in the strong-field limit (peak intensities ~10  TW/cm2) a branching ratio significantly less than 2. The optimized pulses operate by a pump-dump-pump mechanism, where the dumping to the electronic ground state creates nonstationary vibrational states in HOD.

   Atoms and molecules.
      Interaction of atoms and molecules with external fields and radiation.
         Transitions between electronic states.
            Lifetimes and transition probabilities for molecules.