Timing Dissociative Ionization of H 2 Using a Polarization-Skewed Femtosecond Laser Pulse

摘要: We experimentally observe the bond stretching time of one-photon and net-two-photon dissociation pathways singly ionized ${\mathrm{H}}_{2}$ molecules driven by a polarization-skewed femtosecond laser pulse. By measuring angular distributions ejected photoelectron nuclear fragments in coincidence, cycle-changing polarization field enables us to clock photon-ionization starting photon-dissociation stopping time, analogous stopwatch. After single ionization ${\mathrm{H}}_{2}$, our results show that produced ${\mathrm{H}}_{2}^{+}$ takes almost same stretch internuclear distance coupled dipole-transition between ground excited electronic states. The spatiotemporal mapping character provides straightforward route ultrafast dynamics with sub-optical-cycle resolution.