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Resonant two-photon ionization of helium atoms studied by attosecond interferometry

Neoričić, L. LU ; Busto, D. LU orcid ; Laurell, H. LU ; Weissenbilder, R. LU ; Ammitzböll, M. LU orcid ; Luo, S. LU ; Peschel, J. LU ; Wikmark, H. LU orcid ; Lahl, J. LU and Maclot, S. LU , et al. (2022) In Frontiers in Physics 10.
Abstract

We study resonant two-photon ionization of helium atoms via the 1s3p, 1s4p and 1s5p1P1 states using the 15th harmonic of a titanium-sapphire laser for the excitation and a weak fraction of the laser field for the ionization. The phase of the photoelectron wavepackets is measured by an attosecond interferometric technique, using the 17th harmonic. We perform experiments with angular resolution using a velocity map imaging spectrometer and with high energy resolution using a magnetic bottle electron spectrometer. Our results are compared to calculations using the two-photon random phase approximation with exchange to account for electron correlation effects. We give an interpretation for the... (More)

We study resonant two-photon ionization of helium atoms via the 1s3p, 1s4p and 1s5p1P1 states using the 15th harmonic of a titanium-sapphire laser for the excitation and a weak fraction of the laser field for the ionization. The phase of the photoelectron wavepackets is measured by an attosecond interferometric technique, using the 17th harmonic. We perform experiments with angular resolution using a velocity map imaging spectrometer and with high energy resolution using a magnetic bottle electron spectrometer. Our results are compared to calculations using the two-photon random phase approximation with exchange to account for electron correlation effects. We give an interpretation for the multiple π-rad phase jumps observed, both at and away from resonance, as well as their dependence on the emission angle.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
attosecond, attosecond dynamics, photoelectron interferometry, photoionization, photoionization dynamics
in
Frontiers in Physics
volume
10
article number
964586
publisher
Frontiers Media S. A.
external identifiers
  • scopus:85140392761
ISSN
2296-424X
DOI
10.3389/fphy.2022.964586
project
Electronic coherence and correlation in attosecond photoionization dynamics
Controlling the photoelectric effect in real-time
language
English
LU publication?
yes
id
7524f913-0a78-4e6e-85a2-14392cbd183b
date added to LUP
2022-12-13 15:20:48
date last changed
2024-06-15 00:20:58
@article{7524f913-0a78-4e6e-85a2-14392cbd183b,
  abstract     = {{<p>We study resonant two-photon ionization of helium atoms via the 1s3p, 1s4p and 1s5p<sup>1</sup>P<sub>1</sub> states using the 15<sup>th</sup> harmonic of a titanium-sapphire laser for the excitation and a weak fraction of the laser field for the ionization. The phase of the photoelectron wavepackets is measured by an attosecond interferometric technique, using the 17<sup>th</sup> harmonic. We perform experiments with angular resolution using a velocity map imaging spectrometer and with high energy resolution using a magnetic bottle electron spectrometer. Our results are compared to calculations using the two-photon random phase approximation with exchange to account for electron correlation effects. We give an interpretation for the multiple π-rad phase jumps observed, both at and away from resonance, as well as their dependence on the emission angle.</p>}},
  author       = {{Neoričić, L. and Busto, D. and Laurell, H. and Weissenbilder, R. and Ammitzböll, M. and Luo, S. and Peschel, J. and Wikmark, H. and Lahl, J. and Maclot, S. and Squibb, R. J. and Zhong, S. and Eng-Johnsson, P. and Arnold, C. L. and Feifel, R. and Gisselbrecht, M. and Lindroth, E. and L’Huillier, A.}},
  issn         = {{2296-424X}},
  keywords     = {{attosecond; attosecond dynamics; photoelectron interferometry; photoionization; photoionization dynamics}},
  language     = {{eng}},
  publisher    = {{Frontiers Media S. A.}},
  series       = {{Frontiers in Physics}},
  title        = {{Resonant two-photon ionization of helium atoms studied by attosecond interferometry}},
  url          = {{http://dx.doi.org/10.3389/fphy.2022.964586}},
  doi          = {{10.3389/fphy.2022.964586}},
  volume       = {{10}},
  year         = {{2022}},
}