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Time-frequency representation of autoionization dynamics in helium

Busto, D. LU ; Barreau, L.; Isinger, M. LU ; Turconi, M.; Alexandridi, C.; Harth, A. LU ; Zhong, S. LU ; Squibb, R. J.; Kroon, D. LU and Plogmaker, S. LU , et al. (2018) In Journal of Physics B: Atomic, Molecular and Optical Physics 51(4).
Abstract

Autoionization, which results from the interference between direct photoionization and photoexcitation to a discrete state decaying to the continuum by configuration interaction, is a well known example of the important role of electron correlation in light-matter interaction. Information on this process can be obtained by studying the spectral, or equivalently, temporal complex amplitude of the ionized electron wave packet. Using an energy-resolved interferometric technique, we measure the spectral amplitude and phase of autoionized wave packets emitted via the sp2+ and sp3+ resonances in helium. These measurements allow us to reconstruct the corresponding temporal profiles by Fourier transform. In addition,... (More)

Autoionization, which results from the interference between direct photoionization and photoexcitation to a discrete state decaying to the continuum by configuration interaction, is a well known example of the important role of electron correlation in light-matter interaction. Information on this process can be obtained by studying the spectral, or equivalently, temporal complex amplitude of the ionized electron wave packet. Using an energy-resolved interferometric technique, we measure the spectral amplitude and phase of autoionized wave packets emitted via the sp2+ and sp3+ resonances in helium. These measurements allow us to reconstruct the corresponding temporal profiles by Fourier transform. In addition, applying various time-frequency representations, we observe the build-up of the wave packets in the continuum, monitor the instantaneous frequencies emitted at any time and disentangle the dynamics of the direct and resonant ionization channels.

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publication status
published
subject
keywords
attosecond pulse, autoionization, Fano resonance, RABBIT, time-frequency representations, Wigner
in
Journal of Physics B: Atomic, Molecular and Optical Physics
volume
51
issue
4
publisher
IOP Publishing
external identifiers
  • scopus:85041177280
ISSN
0953-4075
DOI
language
English
LU publication?
yes
id
255fd5bf-25c3-4d62-acaa-ad7be9403fc3
date added to LUP
2018-02-12 10:47:55
date last changed
2018-05-29 11:07:18
@article{255fd5bf-25c3-4d62-acaa-ad7be9403fc3,
  abstract     = {<p>Autoionization, which results from the interference between direct photoionization and photoexcitation to a discrete state decaying to the continuum by configuration interaction, is a well known example of the important role of electron correlation in light-matter interaction. Information on this process can be obtained by studying the spectral, or equivalently, temporal complex amplitude of the ionized electron wave packet. Using an energy-resolved interferometric technique, we measure the spectral amplitude and phase of autoionized wave packets emitted via the sp2<sup>+</sup> and sp3<sup>+</sup> resonances in helium. These measurements allow us to reconstruct the corresponding temporal profiles by Fourier transform. In addition, applying various time-frequency representations, we observe the build-up of the wave packets in the continuum, monitor the instantaneous frequencies emitted at any time and disentangle the dynamics of the direct and resonant ionization channels.</p>},
  articleno    = {044002},
  author       = {Busto, D. and Barreau, L. and Isinger, M. and Turconi, M. and Alexandridi, C. and Harth, A. and Zhong, S. and Squibb, R. J. and Kroon, D. and Plogmaker, S. and Miranda, M. and Jiménez-Galán,  and Argenti, L. and Arnold, C. L. and Feifel, R. and Martín, F. and Gisselbrecht, M. and L'Huillier, A. and Salières, P.},
  issn         = {0953-4075},
  keyword      = {attosecond pulse,autoionization,Fano resonance,RABBIT,time-frequency representations,Wigner},
  language     = {eng},
  month        = {01},
  number       = {4},
  publisher    = {IOP Publishing},
  series       = {Journal of Physics B: Atomic, Molecular and Optical Physics},
  title        = {Time-frequency representation of autoionization dynamics in helium},
  url          = {http://dx.doi.org/},
  volume       = {51},
  year         = {2018},
}