M Abu-samha et al 2008 J. Phys. B: At. Mol. Opt. Phys. 41 245601 doi:10.1088/0953-4075/41/24/245601
M Abu-samha, D Dimitrovski and L B Madsen
Show affiliationsWe present a theoretical study of strong-field ionization of selected rare-gas atoms and hydrogen in the tunnelling regime, using two- and ten-cycle laser pulses. For two-cycle pulses, ionization occurs via the tunnelling process, and the Coulombic long-range part of the atomic potentials leads to bimodal longitudinal momentum distributions. The momentum distributions are not sensitive to the electronic structure of the probed atom. For ten-cycle pulses, a multiphoton picture emerges even in the tunnelling regime, and the momentum distributions are influenced by the internal structure of the probed atom. The effect of the internal structure is clearly demonstrated in the case of Ar, where the longitudinal momentum distribution obtained using a ten-cycle pulse peaks at zero momentum.
32.80.Rm Multiphoton ionization and excitation to highly excited states
Issue 24 (28 December 2008)
Received 17 September 2008, in final form 4 November 2008
Published 1 December 2008
M Abu-samha et al 2008 J. Phys. B: At. Mol. Opt. Phys. 41 245601
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S Morrison et al 2008 New J. Phys. 10 073032
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Pedro D. Alvarez et al JHEP03(2009)034
S Gammelmark and K Mølmer 2009 New J. Phys. 11 033017
Moshe Schwartz 2003 J. Phys. A: Math. Gen. 36 7507
A Kantian et al 2007 New J. Phys. 9 407
D Ebeling et al 2006 Nanotechnology 17 S221