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APS » Journals » Phys. Rev. Lett. » Volume 101 » Issue 16
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Phys. Rev. Lett. 101, 163002 (2008) [4 pages]

Suppression of Photoionization by a Static Field

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Ido Gilary and Yesodharan Sajeev
Schulich Faculty of Chemistry, Technion–Israel Institute of Technology, Haifa, 32000, Israel

Marcelo F. Ciappina, Alexander Croy, Christoph M. Goletz, Shachar Klaiman, Milan Šindelka, Martin Winter, and Waltraut Wustmann
Minerva Summer School on Laser-Matter Interaction, Max-Planck-Institute and Minerva Center for Nonlinear Physics of Complex Systems, MPIPKS at Dresden, Germany

Nimrod Moiseyev*
Minerva Summer School and Schulich Faculty of Chemistry and Department of Physics, Technion–Israel Institute of Technology, Haifa, 32000, Israel

Received 19 December 2007; published 17 October 2008

The dc field Stark effect is studied theoretically for atoms in high intensity laser fields. We prove that the first-order perturbation corrections for the energy and photoionization rate vanish when the dc field strength serves as a perturbational strength parameter. Our calculations show that by applying a dc field in the same direction as the polarization direction of the ac field, the photoinduced ionization rate is almost entirely suppressed. This suppression is attributed to changes in the phase shift of the continuum atomic wave functions which can be controlled by the dc field.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.163002
DOI:
10.1103/PhysRevLett.101.163002
PACS:
32.60.+i

*Corresponding author: nimrod@technion.ac.il

 
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