Cluster ionization via two-plasmon excitation

  title={Cluster ionization via two-plasmon excitation},
  author={George F. Bertsch and Nguyen Van Giai and Nicole Vinh Mau},
  journal={Physical Review A},
We calculate the two-photon ionization of clusters for photon energies near the surface plasmon resonance. The plasmon is described in a schematic jellium-RPA model assuming a separable residual interaction between electrons determined so that the plasmon energy is reproduced. The ionization rate of a double plasmon excitation is calculated perturbatively. In ${\mathrm{Na}}_{93}^{+}$ clusters we find an ionization rate of the order of at most $0.05\char21{}0.10 {\mathrm{fs}}^{\ensuremath{-}1… 

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