Suppressed tunnelling ionization of the molecule in an intense Ti:sapphire laser pulse
- 1 January 1998
- journal article
- letter
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 31 (2) , L49-L58
- https://doi.org/10.1088/0953-4075/31/2/003
Abstract
The multiphoton ionization of was studied using linearly polarized femtosecond laser pulses from a Ti:sapphire laser. Comparing the ion signal versus intensity curve of the singly charged molecular ion with that of an Ar atom with a similar ionization potential, it was found that the rate of ionization of the molecule is much lower than that of the atom. The observation is explained based on the fact that due to the two-centre nature of the potential which produces the barrier for tunnelling, and the orientation of the molecular axis with respect to the laser polarization, the effective barrier is equivalent to that produced by an atom with an effective charge of less than unity. Accordingly, a model is developed which agrees very well with the experimental observation.Keywords
This publication has 12 references indexed in Scilit:
- Non-sequential and sequential double ionization of NO in an intense femtosecond Ti:sapphire laser pulseJournal of Physics B: Atomic, Molecular and Optical Physics, 1997
- Comparison of high harmonic conversion efficiency in atomic and diatomic molecular gasesJournal of Physics B: Atomic, Molecular and Optical Physics, 1997
- Ionization rates and energy and angular distributions at the barrier-suppression ionization of complex atoms and atomic ionsJournal of the Optical Society of America B, 1997
- Population trapping in rare gasesJournal of Physics B: Atomic, Molecular and Optical Physics, 1996
- High harmonic generation in atomic and diatomic molecular gases using intense picosecond laser pulses-a comparisonJournal of Physics B: Atomic, Molecular and Optical Physics, 1994
- Laser-induced molecular alignment probed by a double-pulse experimentJournal of Physics B: Atomic, Molecular and Optical Physics, 1992
- Ionization of atoms in the tunnelling regime with experimental evidence using Hg atomsJournal of Physics B: Atomic, Molecular and Optical Physics, 1992
- On the field ionisation of diatomic molecules by intense laser fieldsJournal of Physics B: Atomic, Molecular and Optical Physics, 1989
- Franck—Condon Factors for the Ionization of H2 and D2The Journal of Chemical Physics, 1966
- Self-consistent field for molecular hydrogenMathematical Proceedings of the Cambridge Philosophical Society, 1938