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APS » Journals » Phys. Rev. Lett. » Volume 94 » Issue 3
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Phys. Rev. Lett. 94, 033003 (2005) [4 pages]

Shakeup Excitation during Optical Tunnel Ionization

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I. V. Litvinyuk*, F. Légaré, P. W. Dooley, D. M. Villeneuve, and P. B. Corkum†
National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, Canada K1A 0R6

J . Zanghellini, A. Pegarkov, C. Fabian, and T. Brabec‡
Center for Photonics Research, University of Ottawa, 150 Louis Pasteur, Ottawa, Ontario, Canada K1N 6N5

Received 11 June 2004; published 27 January 2005

Shakeup of a two-electron system is investigated in the strong infrared laser field limit, both theoretically and experimentally. During tunnel ionization the electron shakes up a second electron to an excited bound state. Theoretically, a complete analytical theory of shakeup in intense laser fields is developed. We predict that shakeup produces one excited σu D2+ state in ≈105 ionization events. Shakeup is measured experimentally by using the molecular clock provided by the internuclear motion. The number of measured events is found to be in excellent agreement with theory.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.033003
DOI:
10.1103/PhysRevLett.94.033003
PACS:
32.80.Rm, 33.80.Rv

*Current address: J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS 66506, USA.

†Electronic address: paul.corkum@nrc.ca

‡Electronic address: brabec@uottawa.ca

 
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