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Journal Article

Velocity-map imaging with counter-propagating laser pulses

MPS-Authors
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Heldt,  Tobias       
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons214150

Oelmann,  Jan-Hendrik       
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons268871

Guth,  Lennart       
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons284960

Lackmann,  Nick       
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30892

Pfeifer,  Thomas       
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Crespo López-Urrutia,  José R.       
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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https://opg.optica.org/directpdfaccess/ada3f157-fd82-44ab-97b12888b14b36eb_564735/ol-49-23-6825.pdf?da=1&id=564735&seq=0&mobile=no
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Citation

Heldt, T., Oelmann, J.-H., Guth, L., Lackmann, N., Pfeifer, T., & Crespo López-Urrutia, J. R. (2024). Velocity-map imaging with counter-propagating laser pulses. Optics Letters, 49(23), 6825-6828. doi:10.1364/OL.540612.


Cite as: https://hdl.handle.net/21.11116/0000-0010-70E0-2
Abstract
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 demon- strate within an enhancement cavity how, independently of the focal Rayleigh length, counter-propagating pulses longi- tudinally compress the ionization volume down to few tens of micrometers. We observe nonlinear above-threshold ion- ization (ATI) processes confined to the spatial overlap of femtosecond pulses, whereas the shortened ionization vol- ume makes an electrostatic lens unnecessary for VMI.