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MO: Fachverband Molekülphysik

MO 21: Posters 4: Novelties in Molecular Physics

MO 21.20: Poster

Donnerstag, 26. März 2015, 17:00–19:00, C/Foyer

Novel setup for a laser-based terahertz-field-driven extreme ultraviolet streak camera allowing for time resolved measurements of the full angle and kinetic energy distribution of electrons — •Martin Ranke, Fawad Karimi, Markus Pfau, Thomas Gebert, and Ulrike Frühling — Institut für Experimentalphysik, Luruper Chaussee 149, 22761 Hamburg, Deutschland

In this work, a novel setup of a terahertz (THz) -field-driven extreme ultraviolet (XUV) streak camera for studying femtosecond dynamics in atoms and molecules is presented. High-harmonic generated XUV-pulses are synchronized and superimposed with intense single-cycle THz pulses in a gas target. The XUV pulses are used to excite and ionize atoms or molecules. The resulting electrons are accelerated by the electric THz field which directly relates the change of the momentum to the THz vector potential. The kinetic energies of the electrons are measured fully angle resolved by a new velocity map imaging (VMI) spectrometer. The intense THz pulses are generated with a tilted pulse front setup of near infrared laser pulses by means of optical rectification in a nonlinear crystal.