C$_{60}$ in intense femtosecond laser pulses: nonlinear dipole response and ionization

Details C$_{60}$ in intense femtosecond laser pulses: nonlinear dipole response and ionization C$_{60}$ in intense femtosecond laser pulses: nonlinear dipole response and ionization

2001-06-14

arxiv.org/abs/physics/0106044v3

Physics

Atomic and Molecular Clusters

14 pages, including 1 table, 5 figures

Scientific paper

10.1103/PhysRevA.64.063203

We study the interaction of strong femtosecond laser pulses with the C$_{60}$ molecule employing time-dependent density functional theory with the ionic background treated in a jellium approximation. The laser intensities considered are below the threshold of strong fragmentation but too high for perturbative treatments such as linear response. The nonlinear response of the model to excitations by short pulses of frequencies up to 45eV is presented and analyzed with the help of Kohn-Sham orbital resolved dipole spectra. In femtosecond laser pulses of 800nm wavelength ionization is found to occur multiphoton-like rather than via excitation of a ``giant'' resonance.

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