Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5376801 | Chemical Physics | 2006 | 10 Pages |
Abstract
After preparing a coherent vibrational wave packet in the hydrogen molecular ion by ionizing neutral H2 molecules with a 6.5Â fs, 760Â nm laser pulse at 3Â ÃÂ 1014Â W/cm2, we map its spatio-temporal evolution by the fragmentation induced with a second 6.5Â fs laser pulse of doubled intensity. In this proof-of-principle experiment, we visualize the oscillations of this most fundamental molecular system, observe a dephasing of the vibrational wave packet and its subsequent revival. Whereas the experimental data exhibit an overall qualitative agreement with the results of a simple numerical simulation, noticeable discrepancy is found in the characteristic revival time. The most likely reasons for this disagreement originate from the simplifications used in the theoretical model, which assumes a Franck-Condon transition induced by the pump pulse with subsequent field-free propagation of the H2+ vibrational wave packet, and neglects the influence of the rotational motion.
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Authors
A. Rudenko, Th. Ergler, B. Feuerstein, K. Zrost, C.D. Schröter, R. Moshammer, J. Ullrich,