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Nonadiabatic Multielectron Dynamics in Strong Field Molecular Ionization.

Lezius1, Blanchet, Rayner

  • 1Institut für Ionenphysik, Universität Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria.

Physical Review Letters
|January 3, 2001
PubMed
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Highly nonadiabatic multielectron excitation in polyatomic molecules drives a strong field ionization mechanism. This process significantly impacts molecular ionization, fragmentation, and energetics, offering new insights into molecular behavior under intense light.

Area of Science:

  • Physical Chemistry
  • Molecular Physics
  • Quantum Dynamics

Background:

  • Strong field ionization is a fundamental process in molecular physics.
  • Understanding multielectron dynamics is crucial for predicting molecular response to intense laser fields.
  • Nonadiabatic effects play a significant role in complex molecular systems.

Purpose of the Study:

  • To identify and characterize a general strong field ionization mechanism in polyatomic molecules.
  • To investigate the influence of nonadiabatic multielectron excitation dynamics on molecular ionization, fragmentation, and energetics.
  • To determine the dependence of this ionization mechanism on optical frequency, intensity, and molecular properties.

Main Methods:

  • Theoretical modeling of multielectron dynamics in polyatomic molecules.

Related Experiment Videos

  • Numerical simulations of molecular response to intense laser fields.
  • Analysis of ionization yields, fragmentation patterns, and energy distributions.

    • Main Results:

    • Observation of a novel strong field ionization mechanism driven by nonadiabatic multielectron excitation.
    • Demonstration that this mechanism significantly alters molecular ionization pathways and fragmentation.
    • Quantification of the impact on molecular energetics under varying optical conditions.

    Conclusions:

    • Nonadiabatic multielectron excitation is a key factor in strong field ionization of polyatomic molecules.
    • This mechanism provides a unified explanation for observed phenomena in molecular strong field interactions.
    • The findings offer a new framework for controlling and understanding molecular ionization and fragmentation.