C Ruiz and A Becker 2008 New J. Phys. 10 025020 doi:10.1088/1367-2630/10/2/025020
Time-resolved mapping of correlated electron emission from helium atom in an intense laser pulse
Focus on Attosecond PhysicsC Ruiz and A Becker1
Show affiliationsPart of Focus on Attosecond Physics
We apply and analyze the concept of mapping ionization time on to the final momentum distribution to the correlated electron dynamics in the nonsequential double ionization of helium in a strong laser pulse (λ=800 nm) and show how the mapping provides insight into the double ionization dynamics. To this end, we study, by means of numerical integration of the time-dependent Schrödinger equation of a fully correlated model atom, the temporal evolution of the center-of-mass momentum in a short laser pulse. Our results show that in the high intensity regime (I0=1.15×1015 W cm-2), the mapping is in good agreement with a classical model including binary and recoil rescattering mechanisms. In the medium intensity regime (I0=5×1014 W cm-2), we identify additional contributions from the recollision-induced excitation of the ion followed by subsequent field ionization (RESI).
- PACS
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32.80.Fb Photoionization of atoms and ions
31.15.-p Calculations and mathematical techniques in atomic and molecular physics
32.80.Rm Multiphoton ionization and excitation to highly excited states
- Subjects
- Dates
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Issue 2 (February 2008)
Received 10 September 2007
Published 29 February 2008
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Time-resolved mapping of correlated electron emission from helium atom in an intense laser pulse
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