Attosecond control of dissociative ionization of O2 molecules

Physical Review A 84, 063412 (2011)

Attosecond control of dissociative ionization of O2 molecules

W Siu, F Kelkensberg, G Gademann, A Rouzee, P Johnsson, D Dowek, M Lucchini, F Calegari, U De Giovannini, A Rubio, R. Lucchese, H Kono, F Lepine, M J Vrakking

We demonstrate that dissociative ionization of O2 can be controlled by the relative delay between an attosecond pulse train (APT) and a copropagating infrared (IR) field. Our experiments reveal a dependence of both the branching ratios between a range of electronic states and the fragment angular distributions on the extreme ultraviolet (XUV) to IR time delay. The observations go beyond adiabatic propagation of dissociative wave packets on IR-induced quasistatic potential energy curves and are understood in terms of an IR-induced coupling between electronic states in the molecular ion.

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http://dx.doi.org/10.1103/PhysRevA.84.063412

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