Hannover 2010 – wissenschaftliches Programm
Q 62.1: Vortrag
Freitag, 12. März 2010, 10:30–10:45, F 102
Field-free orientation of molecules by femtosecond two-color laser fields — •Matthias Kling1,2, Irina Znakovskaya1, Sankar De2, Dipanwita Ray2, Fatima Anis2, Nora Johnson2, Irina Bocharova2, Maia Magrakvelidze2, Brett Esry2, Charles Lewis Cocke2, and Igor Litvinyuk2 — 1MPQ, Hans-Kopfermann-Str. 1, 85748 Garching, Germany — 2JRML, K-State University, Manhattan, KS 66506, USA
We report on the first experimental observation of nonadiabatic field-free orientation of a heteronuclear diatomic molecule (CO) induced by an intense two-color (800 and 400 nm) femtosecond laser field . We monitor orientation by measuring fragment ion angular distributions after Coulomb explosion with an 800 nm pulse. The orientation of the molecules is controlled by the relative phase of the two-color field. The results are compared to quantum mechanical rigid rotor calculations. The demonstrated method can be applied to study molecular frame dynamics under field-free conditions in conjunction with a variety of
spectroscopy methods, such as high-harmonic generation, electron diffraction, and molecular frame photoelectron emission.
De et al., Phys. Rev. Lett. 103, 153002 (2009)