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Related Experiment Videos

Alignment-dependent strong field ionization of molecules.

I V Litvinyuk1, Kevin F Lee, P W Dooley

  • 1Steacie Institute for Molecular Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, K1A 0R6, Canada.

Physical Review Letters
|July 15, 2003
PubMed
Summary

We developed a new method to measure how laser light ionizes aligned molecules. Nitrogen molecules (N2) are four times more likely to ionize when oriented parallel to the laser field.

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Area of Science:

  • Physical Chemistry
  • Molecular Physics
  • Quantum Dynamics

Background:

  • Strong field laser ionization is a key process in understanding molecular responses to intense light.
  • Controlling molecular orientation is crucial for studying anisotropic phenomena.
  • Previous methods lacked the precision for macroscopic alignment during ionization studies.

Purpose of the Study:

  • To demonstrate a novel method for measuring strong field laser ionization of dynamically aligned molecules.
  • To investigate the influence of molecular orientation on the ionization yield of nitrogen molecules (N2).

Main Methods:

  • Employing macroscopic field-free dynamic alignment of molecules.
  • Utilizing revivals of rotational wave packets generated by femtosecond laser pulses.

Related Experiment Videos

  • Measuring the strong field ionization yield as a function of molecular orientation.

    • Main Results:

    • Successfully demonstrated a method to measure strong field ionization of aligned molecules.
    • Observed a significant dependence of N2 ionization on molecular orientation.
    • Found that N2 molecules are four times more likely to ionize when aligned parallel versus perpendicular to the laser field.

    Conclusions:

    • Molecular orientation dramatically affects strong field ionization probabilities.
    • The developed method provides a new tool for studying light-matter interactions in oriented molecules.
    • This work offers insights into electron dynamics and bond breaking in molecules exposed to intense laser fields.