Journal of Chemical Physics, Vol.103, No.13, 5362-5365, 1995
Alignment of Gas-Phase Molecules by Dynamic Stark-Effect with Coherent Narrow-Band Ultraviolet-Laser Pulses
Alignment of vibronically excited benzene (C-6 D-6) along a lab-fixed axis in a selected rotational J, K, and m state is obtained by a UV-W optical double-resonance experiment without additional, static electric or magnetic fields. The dynamic Stark effect caused by a narrow band, coherent laser pulse leads to an energetic separation of the individual m levels and renders the selective excitation of m’=J’ levels by a weaker probing laser pulse.