Hannover 2013 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 17: Interaction with strong or short laser pulses II
A 17.1: Hauptvortrag
Dienstag, 19. März 2013, 14:00–14:30, B 302
Ultrafast dynamics in molecular systems and clusters — •Maria Krikunova1, Theophilos Maltezopoulos2, Philipp Wessels2, Ulrike Frühling2, Marek Wieland2, Markus Drescher2, Alaa Al-Shemmary3, Nikola Stojanovic3, Maria Müller1, Jan P. Müller1, Bernd Schütte4, and Thomas Möller1 — 1Technische Universität, Berlin — 2Universität Hamburg — 3HASYLAB, DESY — 4Max-Born-Institut Berlin
Intense light fields can produce highly excited non-equilibrium states of matter ultimately causing the explosion of molecules and nanoparticles into atomic fragments. Understanding these processes in even simple systems is challenging because it requires experiments that can follow the dynamics on extremely short time-scales. Novel light sources, such as the free-electron laser (FEL) facility in Hamburg, FLASH, now deliver synchronized ultra-short pulses in the soft X-ray, near-infrared (NIR) and far-infrared (terahertz, THz) spectral ranges allowing the realization of new types of pump-probe schemes.
Due to the different interaction mechanisms of pump and probe pulses with the target the tracing of dynamical details within the envelope of the exciting pulse itself becomes possible. With the soft X-ray pulses from FLASH we were able to track the electron redistribution in iodine molecules exposed to a strong NIR field. Utilization of a THz-field driven streak camera principle allowed the access to nanoplasma dynamics in rare gas clusters upon ionization with soft X-ray FEL pulses.