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Velocity-map imaging with counter-propagating laser pulses

Velocity-map imaging (VMI) is a key tool for studying outgoing electrons or ions following optical strong-field interactions of atoms and molecules and provides good momentum resolution even if the source volume of the fragments extends along a laser beam path. Here, we demonstrate within an enhance...

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Main Authors: Heldt, Tobias (Author) , Oelmann, Jan-Hendrik (Author) , Guth, Lennart (Author) , Lackmann, Nick (Author) , Pfeifer, Thomas (Author) , Crespo López-Urrutia, José Ramon (Author)
Format: Article (Journal)
Language:English
Published: 25 November 2024
In: Optics letters
Year: 2024, Volume: 49, Issue: 23, Pages: 6825-6828
ISSN:1539-4794
DOI:10.1364/OL.540612
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1364/OL.540612
Verlag, kostenfrei, Volltext: https://opg.optica.org/ol/abstract.cfm?uri=ol-49-23-6825
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Author Notes:Tobias Heldt, Jan-Hendrik Oelmann, Lennart Guth, Nick Lackmann, Thomas Pfeifer, and José R. Crespo López-Urrutia
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Summary:Velocity-map imaging (VMI) is a key tool for studying outgoing electrons or ions following optical strong-field interactions of atoms and molecules and provides good momentum resolution even if the source volume of the fragments extends along a laser beam path. Here, we demonstrate within an enhancement cavity how, independently of the focal Rayleigh length, counter-propagating pulses longitudinally compress the ionization volume down to few tens of micrometers. We observe nonlinear above-threshold ionization (ATI) processes confined to the spatial overlap of femtosecond pulses, whereas the shortened ionization volume makes an electrostatic lens unnecessary for VMI.
Item Description:Gesehen am 05.03.2025
Physical Description:Online Resource
ISSN:1539-4794
DOI:10.1364/OL.540612

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