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Sub-cycle ionization dynamics revealed by trajectory resolved, elliptically-driven high-order harmonic generation

Larsen, Esben Witting LU ; Carlström, Stefanos LU ; Lorek, Eleonora LU ; Heyl, Christoph Michael LU ; Palecek, David LU ; Schafer, Kenneth Joseph LU ; L'Huillier, Anne LU ; Zigmantas, Donatas LU and Mauritsson, Johan LU (2016) In Scientific Reports 6.
Abstract

The sub-cycle dynamics of electrons driven by strong laser fields is central to the emerging field of attosecond science. We demonstrate how the dynamics can be probed through high-order harmonic generation, where different trajectories leading to the same harmonic order are initiated at different times, thereby probing different field strengths. We find large differences between the trajectories with respect to both their sensitivity to driving field ellipticity and resonant enhancement. To accurately describe the ellipticity dependence of the long trajectory harmonics we must include a sub-cycle change of the initial velocity distribution of the electron and its excursion time. The resonant enhancement is observed only for the long... (More)

The sub-cycle dynamics of electrons driven by strong laser fields is central to the emerging field of attosecond science. We demonstrate how the dynamics can be probed through high-order harmonic generation, where different trajectories leading to the same harmonic order are initiated at different times, thereby probing different field strengths. We find large differences between the trajectories with respect to both their sensitivity to driving field ellipticity and resonant enhancement. To accurately describe the ellipticity dependence of the long trajectory harmonics we must include a sub-cycle change of the initial velocity distribution of the electron and its excursion time. The resonant enhancement is observed only for the long trajectory contribution of a particular harmonic when a window resonance in argon, which is off-resonant in the field-free case, is shifted into resonance due to a large dynamic Stark shift.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Scientific Reports
volume
6
publisher
Nature Publishing Group
external identifiers
  • scopus:85006474636
  • wos:000390222500001
ISSN
2045-2322
DOI
10.1038/srep39006
language
English
LU publication?
yes
id
96f40359-d1e3-4309-b1fc-873b1951153a
date added to LUP
2016-12-30 12:26:52
date last changed
2017-09-18 11:34:54
@article{96f40359-d1e3-4309-b1fc-873b1951153a,
  abstract     = {<p>The sub-cycle dynamics of electrons driven by strong laser fields is central to the emerging field of attosecond science. We demonstrate how the dynamics can be probed through high-order harmonic generation, where different trajectories leading to the same harmonic order are initiated at different times, thereby probing different field strengths. We find large differences between the trajectories with respect to both their sensitivity to driving field ellipticity and resonant enhancement. To accurately describe the ellipticity dependence of the long trajectory harmonics we must include a sub-cycle change of the initial velocity distribution of the electron and its excursion time. The resonant enhancement is observed only for the long trajectory contribution of a particular harmonic when a window resonance in argon, which is off-resonant in the field-free case, is shifted into resonance due to a large dynamic Stark shift.</p>},
  articleno    = {39006},
  author       = {Larsen, Esben Witting and Carlström, Stefanos and Lorek, Eleonora and Heyl, Christoph Michael and Palecek, David and Schafer, Kenneth Joseph and L'Huillier, Anne and Zigmantas, Donatas and Mauritsson, Johan},
  issn         = {2045-2322},
  language     = {eng},
  month        = {12},
  publisher    = {Nature Publishing Group},
  series       = {Scientific Reports},
  title        = {Sub-cycle ionization dynamics revealed by trajectory resolved, elliptically-driven high-order harmonic generation},
  url          = {http://dx.doi.org/10.1038/srep39006},
  volume       = {6},
  year         = {2016},
}