Hannover 2016 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 6: Posters 1: Novelties in Molecular Physics: Femtosecond Spectroscopy

MO 6.9: Poster

Montag, 29. Februar 2016, 16:30–19:00, Empore Lichthof

Laser-based THz-field-driven XUV streak camera for time resolved measurements of angular energy distribution of electrons — •Ranke Martin, Karimi Fawad, Pfau Markus, Dimitriou Anastasios, and Frühling Ulrike — Institut für Experimentalphysik, Universität Hamburg

In this work, we present a novel setup for the study of femtosecond (fs) dynamics in atoms and molecules with the use of a terahertz (THz) -field-driven extreme ultraviolet (XUV) streak camera. 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.