Frankfurt 2006 – wissenschaftliches Programm
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A: Atomphysik
A 17: Hauptvortr
äge: Cluster in starken Laserfeldern
A 17.2: Hauptvortrag
Donnerstag, 16. März 2006, 11:10–11:40, H7
The photophysics of C60: Analysis and control of non-adiabatic multi-electron dynamics — •T. Laarmann, I. Shchatsinin, A. Stalmashonak, N. Zhavoronkov, G. Stibenz, G. Steinmeyer, C. P. Schulz, and I. V. Hertel — Max-Born-Institut, Max-Born Str. 2a, D-12489 Berlin, Germany
Non-adiabatic multi-electron dynamics (NMED) of molecules in intense laser fields has recently attracted great interest. C60 can be regarded as an ideal model system for the investigation of strong-field phenomena in molecules with extended π electron system [1]. Under the influence of a fs-laser pulse the 240 valence electrons couple strongly among each other and with the nuclear degrees of freedom of the system. Recent model calculations have shown that many electrons may be excited even at relatively moderate intensities above some 1010 Wcm−2: the single active electron (SAE) picture commonly used for atoms and small molecules cannot be used to explain details of the photophysics of many-body systems in strong electromagnetic fields. We have studied the energetic and dynamics of C60 with laser pulses of different wavelength, at laser intensities ranging from 1010 to 1014 Wcm−2 and pulse durations as short as 9 fs. By photoelectron and photoion spectroscopy in combination with pump-probe and optimal control schemes, new insights into the basic mechanisms of energy deposition, redistribution, ionisation and fragmentation are obtained.
I. V. Hertel, T. Laarmann, and C. P. Schulz, Ad. At. Mol. and Opt. Phys. 50, 219 (2005)