Influence of Shape Resonances on the Angular Dependence of Molecular Photoionization Delays

Abstract

Characterizing time delays in molecular photoionization as a function of the ejected electron emission direction relative to the orientation of the molecule and the light polarization axis pro-vides unprecedented insights into the attosecond dynamics induced by extreme ultraviolet or X-ray one-photon absorption, including the role of electronic correlation and continuum resonant states. Here, we report completely resolved experimental and computational angular depend-ence of single-photon ionization delays in NO molecules across a shape resonance, relying on synchrotron radiation and time independent ab initio calculations. The angle-dependent time delay variations of few hundreds of attoseconds, resulting from the interference of the resonant and non-resonant contributions to the dynamics of the ejected electron, are well described using a multichannel Fano model where the resonance time delay is angle-independent. Comparing these results with the same resonance computed in e-NO+ scattering highlights the connection of photoionization delays with Wigner scattering time delays.

arXiv comment21 pages, 10 figures, supporting material included

References in corpus (9)

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• Attosecond delays in molecular photoionization
• Phase-resolved attosecond near-threshold photoionization of molecular nitrogen
• Phase measurement of a Fano window resonance using tunable attosecond pulses
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Cited by in corpus (9)

• Attosecond Ionization Time Delays in Strong-Field Physics
• Fano interference in quantum resonances from angle-resolved elastic scattering
• Angular dependence of the Wigner time delay upon strong field ionization from an aligned p-orbital
• Relation Between Photoionisation Cross Sections and Attosecond Time Delays
• Resonant photoionization and time delay
• Shape resonances in photoionization cross sections and time delay
• Time delays in anisotropic systems
• A multiple scattering theoretical approach to time delay in high energy core-level photoemission of heteronuclear diatomic molecules
• Streaking single-electron ionization in open-shell molecules driven by X-ray pulses