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A: Fachverband Atomphysik

A 10: Poster: Interaction with strong or short laser pulses

A 10.7: Poster

Montag, 23. März 2015, 17:00–19:00, C/Foyer

Ionization of atoms and molecules in a strong two-color field — •Yonghao Mi, Nicolas Camus, Martin Laux, Lutz Fechner, Robert Moshammer, and Thomas Pfeifer — Max-Planck-Institute for Nuclear Physics, Heidelberg, Germany

We experimentally investigated the asymmetry of photo-ion and photoelectron momentum spectra of argon and nitrogen. The spectra are obtained by using reaction microscope(COLTRIMS), in which an argon-nitrogen gas mixture is ionized in a strong two-color (400 nm + 800 nm) laser field. By changing the time delay t between the 400 nm laser pulse and the 800 nm pulse, the fan-like stripes in low-energy electron momentum shift from negative momentum to positive for both argon and nitrogen. A phase difference of asymmetric electron emission between Ar and N2 is observed.