Research Papers in Physics and Astronomy

 

Date of this Version

12-14-2005

Comments

Published in Journal of Physics B: Atomic, Molecular and Optical Physics, vol. 38, no. 23 (December 14, 2005). pp. L375–L382. Copyright © 2005 IOP Publishing Ltd. Used by permission.

Abstract

LETTER TO THE EDITOR

The plateau features that characterize the low-frequency spectra of fundamental strong-field processes such as harmonic generation, above-threshold ionization and laser-assisted electron-atom scattering are shown to exist also for photon energies Eγ of the order of the energy |E0| of a bound electron. The existence of these rescattering effects in such a high-frequency (and thus nontunnelling) regime is supported by accurate quantum analyses of intense Ti-Sapphire laser interactions with halogen negative ions, for which Eγ ≈ 0.5|E0|.

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