Quasi-static tunnelling and multiphoton processes in the ionization of Ar and Xe using intense femtosecond laser pulses

  title={Quasi-static tunnelling and multiphoton processes in the ionization of Ar and Xe using intense femtosecond laser pulses},
  author={Safura Sharifi and Abdossamad Talebpour and J. Y. Yang and See Leang Chin},
  journal={Journal of Physics B: Atomic, Molecular and Optical Physics},
The ionization of Ar and Xe in a dichroic pulsed laser field, comprising the fundamental and second harmonic of a Ti:sapphire laser, was studied. The ion yield was found to depend on the angle between the polarization vectors of the two fields. The dependence was explained by proposing a model that considered the ionization process to be resulting from the action of two independent mechanisms, namely quasi-static tunnelling and multiphoton ionization. 

Multi-electron dynamics investigated with strong-field tunnelling and XUV photoionization

Tunnel ionization initiated by intense ultrashort laser pulses is highly nonlin­ ear with intensity. Few-cycle pulses can therefore be used to control electron dynamics on subfemtosecond timescales.

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Non-sequential multiple ionization of rare gas atoms in a Ti:Sapphire laser field

Multiple ionization of neon, argon and xenon in a high-intensity Ti:Sapphire laser field has been studied. Ion yield curves of xenon versus laser intensity have been obtained for the first six

LETTER TO THE EDITOR: The effects of dissociative recombination in multiphoton ionization of ?

Using stable, intense fs Ti:sapphire laser pulses, a distinct difference between the multiphoton ionization of and Xe, which have the same ionization potential, was observed. Considering electron

Double ionization of benzene interacting with strong Ti:sapphire laser pulses

Multiphoton/tunnel ionization of benzene, interacting with strong Ti:sapphire laser pulses, to doubly charged ions was studied. In contrast to previously published results on multiphoton/tunnel

Tunneling photodetachment of negative ions exposed to a bichromatic laser field

Tunneling photoionization by a bichromatic field consisting of the coherent superposition of the fundamental laser field frequency and its second harmonic is studied theoretically within the

Precision measurement of strong field double ionization of helium.

The production of He[sup +] and He[Sup 2+] by a 160 fs, 780 nm laser has been measured over an unprecedented 12 orders of magnitude in counting range and the NS yield is found to scale with the ac-tunneling rate for the neutral, even when tunneling is not the dominant ionization pathway.

Production of high-charge states of Xe in a femtosecond laser pulse

In a recent experiment for ionization of the neutral Xe atom with a femtosecond Ti:sapphire laser pulse, large yields of high charge states up to sixfold ionizations have been observed. Here, we

Two-color phase control in tunneling ionization and harmonic generation by a strong laser field and its third harmonic.

Two-color phase control in the total ion yield of ionization is successfully demonstrated in a tunneling regime by using a 100-fs Ti:sapphire laser and its third harmonic. Adding the third harmonic

Phase-dependent effects in multiphoton ionization induced by a laser field and its second harmonic.

  • SchaferKulander
  • Physics
    Physical review. A, Atomic, molecular, and optical physics
  • 1992
Calculations of ionization rates, angular distributions, and above-threshold-ionization spectra for a hydrogen atom in a strong, two-color laser field find that the total ponderomotive shift of the ionization limit is the sum of the shifts for the two individual fields.

Tunneling ionization and harmonic generation in two-color fields

Tunneling ionization and harmonic generation in two-color fields were studied with a fundamental beam (ω) and its harmonics (2ω, 3ω), which were generated by a 100-fs Ti:sapphire laser. Ion yields of

Second-harmonic generation of amplified femtosecond Ti:sapphire laser pulses.

It is shown theoretically and experimentally that one possible process limiting the SHG efficiency at low as well as at high intensities is the modulation of the phase of the fundamental wave.