Ionization of clusters in intense laser pulses through collective electron dynamics

Details Ionization of clusters in intense laser pulses through collective electron dynamics Ionization of clusters in intense laser pulses through collective electron dynamics

2003-10-16

arxiv.org/abs/physics/0310073v1

Phys. Rev. Lett. 91, 223401 (2003)

Physics

Atomic and Molecular Clusters

4 pages (4 figures)

Scientific paper

10.1103/PhysRevLett.91.223401

The motion of electrons and ions in medium-sized rare gas clusters (1000 atoms) exposed to intense laser pulses is studied microscopically by means of classical molecular dynamics using a hierarchical tree code. Pulse parameters for optimum ionization are found to be wavelength dependent. This resonant behavior is traced back to a collective electron oscillation inside the charged cluster. It is shown that this dynamics can be well described by a driven and damped harmonic oscillator allowing for a clear discrimination against other energy absorption mechanisms.

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