Direct measurement of the angular dependence of ionization for N₂, O₂, and CO₂ in intense laser fields

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DOIResolve DOI: https://doi.org/10.1103/PhysRevLett.98.243001
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  1. National Research Council Canada
FormatText
TypeArticle
Journal titlePhysical Review Letters
ISSN0031-9007
Volume98
Issue24
Article number243001
SubjectAngular distribution; Carbon dioxide; Ionization; Molecular orbitals; Probability density function; Alignment angle; Angular dependence; Laser fields; Molecular dynamics
Abstract
We experimentally measure the ionization probability as a function of alignment angle of three molecules in intense laser fields: nitrogen, oxygen, and carbon dioxide. Unlike atoms, molecules have a rotational degree of freedom. By controlling the alignment of the molecule relative to the laser field, molecules offer additional ways to understand strong-field ionization. The angular dependence of ionization directly maps to the orbital symmetry of each molecule. Carbon dioxide is seen to have a very sharp preference for ionization when aligned at 45 degrees to the laser field, in significant disagreement with current theories.
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LanguageEnglish
Peer reviewedYes
NPARC number21276195
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