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Two-photon double ionization of rare gases by a superposition of harmonics

E. P. Benis, D. Charalambidis, T. N. Kitsopoulos, G. D. Tsakiris, and P. Tzallas
Phys. Rev. A 74, 051402(R) – Published 15 November 2006

Abstract

Two XUV-photon double ionization of Kr and Ar by an intense superposition of higher-order harmonics of a Ti:sapphire laser is demonstrated. The logarithm of the Kr2+ and Ar2+ signals measured as a function of the logarithm of the XUV intensity depicts a linear dependence with a slope of 1.8±0.2. Under the XUV intensities and photon energies employed, this slope value provides evidence that to the observed double ionization the direct process has a significant contribution. Applications of the above process to attosecond pulse metrology are also discussed.

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  • Received 7 September 2006

DOI:https://doi.org/10.1103/PhysRevA.74.051402

©2006 American Physical Society

Authors & Affiliations

E. P. Benis1, D. Charalambidis1,2, T. N. Kitsopoulos1,3, G. D. Tsakiris4, and P. Tzallas1,*

  • 1Foundation for Research and Technology-Hellas, Institute of Electronic Structure and Laser, P.O. Box 1527, GR-71110 Heraklion (Crete), Greece
  • 2Department of Physics, University of Crete, P.O. Box 2208, GR71003 Heraklion (Crete), Greece
  • 3Department of Chemistry, University of Crete, P.O. Box 2208, GR71003 Heraklion (Crete), Greece
  • 4Max-Planck-Institut für Quantenoptik, D-85748 Garching, Germany

  • *Email address: ptzallas@iesl.forth.gr

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Issue

Vol. 74, Iss. 5 — November 2006

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