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Related Experiment Videos

Few cycle dynamics of multiphoton double ionization.

V R Bhardwaj1, S A Aseyev, M Mehendale

  • 1National Research Council of Canada, Ottawa, Ontario, Canada K1A 0R6.

Physical Review Letters
|May 1, 2001
PubMed
Summary

In intense field ionization, electron oscillation in laser and parent ion fields causes spatial correlation revivals. Longer laser pulses (50 fs) yielded more double ionization than shorter ones (12 fs), matching theoretical predictions.

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Area of Science:

  • Atomic and Molecular Physics
  • Quantum Optics
  • Strong Field Physics

Background:

  • Intense laser fields can ionize atoms, leading to complex electron dynamics.
  • The interaction of freed electrons with the parent ion and laser field is crucial for ionization processes.

Purpose of the Study:

  • To investigate the influence of laser pulse duration on atomic double ionization.
  • To explore the role of electron recollision dynamics in intense field ionization.

Main Methods:

  • Experimental measurement of Ne(2+)/Ne(+) yield using ultrashort laser pulses (12 fs and 50 fs).
  • Theoretical modeling of electron dynamics in combined laser and atomic potentials.

Main Results:

  • Double ionization yield of Neon (Ne) was significantly lower for 12 fs pulses compared to 50 fs pulses.

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  • Observed yields qualitatively agreed with theoretical predictions linking ionization probability to electron recollision events.

    • Conclusions:

    • Laser pulse duration is a critical parameter controlling double ionization in intense fields.
    • The number of electron recollision events, influenced by pulse duration, dictates the total ionization probability.