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Chromatic aberrations correction of attosecond high-order harmonic beams by flat-top spatial shaping of the fundamental beam

Veyrinas, K. ; Plach, M. LU ; Peschel, J. LU ; Hoflund, M. LU ; Catoire, F. ; Valentin, C. ; Smorenburg, P. ; Dacasa, H. LU orcid ; Maclot, S. LU and Guo, C. LU , et al. (2023) In New Journal of Physics 25(2).
Abstract

Attosecond pulses created by high-order harmonic generation in gases often exhibit strong chromatic aberrations, arising from the broad bandwidth and wavelength-dependent nonlinear light-matter interaction. When the driving laser intensity varies spatially, as for Gaussian driving beams, the apparent source position of the harmonics differs significantly from one order to the next, thus affecting the achievable intensity and duration of the attosecond pulses when they are focused on a target. We show that these chromatic aberrations can be reduced by spatially shaping the fundamental beam to generate high-order harmonics with a driver having a flat-top profile inside the gas medium. By measuring both the intensity profile and wavefront... (More)

Attosecond pulses created by high-order harmonic generation in gases often exhibit strong chromatic aberrations, arising from the broad bandwidth and wavelength-dependent nonlinear light-matter interaction. When the driving laser intensity varies spatially, as for Gaussian driving beams, the apparent source position of the harmonics differs significantly from one order to the next, thus affecting the achievable intensity and duration of the attosecond pulses when they are focused on a target. We show that these chromatic aberrations can be reduced by spatially shaping the fundamental beam to generate high-order harmonics with a driver having a flat-top profile inside the gas medium. By measuring both the intensity profile and wavefront for each harmonic in a plane, we access the extreme ultra-violet (XUV) beam properties and investigate these properties near focus. We observe that controlling chromatic aberrations by flat-top spatial shaping strongly reduces the variation of the XUV spectrum on the beam axis during propagation and, in return, the longitudinal sensitivity of both the temporal profiles and the temporal shifts of the focused attosecond pulses.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
attosecond pulses, chromatic aberration, flat-top, high-order harmonics, spatial shaping
in
New Journal of Physics
volume
25
issue
2
article number
023017
publisher
IOP Publishing
external identifiers
  • scopus:85148451902
ISSN
1367-2630
DOI
10.1088/1367-2630/acb795
language
English
LU publication?
yes
id
6cabb803-98f8-426b-acc8-398ef99b05c2
date added to LUP
2023-03-06 10:22:41
date last changed
2024-01-25 10:19:01
@article{6cabb803-98f8-426b-acc8-398ef99b05c2,
  abstract     = {{<p>Attosecond pulses created by high-order harmonic generation in gases often exhibit strong chromatic aberrations, arising from the broad bandwidth and wavelength-dependent nonlinear light-matter interaction. When the driving laser intensity varies spatially, as for Gaussian driving beams, the apparent source position of the harmonics differs significantly from one order to the next, thus affecting the achievable intensity and duration of the attosecond pulses when they are focused on a target. We show that these chromatic aberrations can be reduced by spatially shaping the fundamental beam to generate high-order harmonics with a driver having a flat-top profile inside the gas medium. By measuring both the intensity profile and wavefront for each harmonic in a plane, we access the extreme ultra-violet (XUV) beam properties and investigate these properties near focus. We observe that controlling chromatic aberrations by flat-top spatial shaping strongly reduces the variation of the XUV spectrum on the beam axis during propagation and, in return, the longitudinal sensitivity of both the temporal profiles and the temporal shifts of the focused attosecond pulses.</p>}},
  author       = {{Veyrinas, K. and Plach, M. and Peschel, J. and Hoflund, M. and Catoire, F. and Valentin, C. and Smorenburg, P. and Dacasa, H. and Maclot, S. and Guo, C. and Wikmark, H. and Zaïr, A. and Strelkov, V. and Picot, C. and Arnold, C. and Eng-Johnsson, P. and L’Huillier, A. and Mével, E. and Constant, E.}},
  issn         = {{1367-2630}},
  keywords     = {{attosecond pulses; chromatic aberration; flat-top; high-order harmonics; spatial shaping}},
  language     = {{eng}},
  number       = {{2}},
  publisher    = {{IOP Publishing}},
  series       = {{New Journal of Physics}},
  title        = {{Chromatic aberrations correction of attosecond high-order harmonic beams by flat-top spatial shaping of the fundamental beam}},
  url          = {{http://dx.doi.org/10.1088/1367-2630/acb795}},
  doi          = {{10.1088/1367-2630/acb795}},
  volume       = {{25}},
  year         = {{2023}},
}