Hannover 2016 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 21: Interaction with strong or short laser pulses

A 21.10: Poster

Dienstag, 1. März 2016, 16:30–19:00, Empore Lichthof

Two-color strong-field ionization of methane — •Martin Laux, Yonghao Mi, Nicolas Camus, Lutz Fechner, Robert Moshammer, and Thomas Pfeifer — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg

Laser pulses with an asymmetric electric field like those created by the superposition of two-color laser fields or single-cycle pulses with fixed carrier-envelope phase may serve as an excellent tool for the study of site- and channel-selective strong-field ionization of molecules. Here, we present experimental results for ionization of methane exposed to 25 fs two-color pulses in a reaction microscope. We investigate and compare the effects of the tunable phase between the fundamental 800 nm near-infrared pulse and its second harmonic on the 3-dimensional momenta of ions and electrons created in the various reaction channels, for example single ionization with and without dissociation, double ionization and Coulomb explosion.