Attosecond control of dissociative ionization of O 2 molecules
- Autori: Siu W.; Kelkensberg F.; Gademann G.; Rouzee A.; Johnsson P.; Dowek D.; Lucchini M.; Calegari F.; De Giovannini U.; Rubio A.; Lucchese R.R.; Kono H.; Lepine F.; Vrakking M.J.J.
- Anno di pubblicazione: 2011
- Tipologia: Articolo in rivista
- OA Link: http://hdl.handle.net/10447/543024
Abstract
We demonstrate that dissociative ionization of O 2 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.