Phys. Rev. Lett. 91, 223401 (2003) [4 pages]Ionization of Clusters in Intense Laser Pulses through Collective Electron DynamicsReceived 16 July 2003; published 24 November 2003 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. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.223401
DOI:
10.1103/PhysRevLett.91.223401
PACS:
36.40.Gk, 31.15.Qg, 36.40.Wa
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