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Focusing Properties of High-Order Harmonics

Hoflund, Maria LU ; Peschel, Jasper LU ; Plach, Marius LU ; Dacasa, Hugo LU orcid ; Veyrinas, Kévin ; Constant, Eric ; Smorenburg, Peter ; Wikmark, Hampus LU orcid ; Maclot, Sylvain LU and Guo, Chen LU , et al. (2021) In Ultrafast Science 2021.
Abstract
Many applications of the extreme ultraviolet (XUV) radiation obtained by high-order harmonic generation (HHG) in gases require a small focus area in order to enable attosecond pulses to reach a high intensity. Here, high-order harmonics generated in Ar with a multiterawatt laser system in a loose focusing geometry are focused to a few micrometers using two toroidal mirrors in a Wolter configuration with a high demagnification factor. Using a knife-edge measurement technique, we determine the position and size of the XUV foci as a function of harmonic order. We show that the focus properties vary with harmonic order and the generation conditions. Simulations, based on a classical description of the harmonic dipole phase and assuming that... (More)
Many applications of the extreme ultraviolet (XUV) radiation obtained by high-order harmonic generation (HHG) in gases require a small focus area in order to enable attosecond pulses to reach a high intensity. Here, high-order harmonics generated in Ar with a multiterawatt laser system in a loose focusing geometry are focused to a few micrometers using two toroidal mirrors in a Wolter configuration with a high demagnification factor. Using a knife-edge measurement technique, we determine the position and size of the XUV foci as a function of harmonic order. We show that the focus properties vary with harmonic order and the generation conditions. Simulations, based on a classical description of the harmonic dipole phase and assuming that the individual harmonics can be described as Gaussian beams, reproduce the experimental behavior. We discuss how the generation geometry affects the intensity and duration of the focused attosecond pulses (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Ultrafast Science
volume
2021
article number
9797453
publisher
American Association for the Advancement of Science (AAAS)
external identifiers
  • scopus:85137048628
ISSN
2765-8791
DOI
10.34133/2021/9797453
language
English
LU publication?
yes
id
5a783b8d-6dcf-40d7-afb6-1d361effc7df
date added to LUP
2021-11-12 13:39:55
date last changed
2023-04-24 04:00:43
@article{5a783b8d-6dcf-40d7-afb6-1d361effc7df,
  abstract     = {{Many applications of the extreme ultraviolet (XUV) radiation obtained by high-order harmonic generation (HHG) in gases require a small focus area in order to enable attosecond pulses to reach a high intensity. Here, high-order harmonics generated in Ar with a multiterawatt laser system in a loose focusing geometry are focused to a few micrometers using two toroidal mirrors in a Wolter configuration with a high demagnification factor. Using a knife-edge measurement technique, we determine the position and size of the XUV foci as a function of harmonic order. We show that the focus properties vary with harmonic order and the generation conditions. Simulations, based on a classical description of the harmonic dipole phase and assuming that the individual harmonics can be described as Gaussian beams, reproduce the experimental behavior. We discuss how the generation geometry affects the intensity and duration of the focused attosecond pulses}},
  author       = {{Hoflund, Maria and Peschel, Jasper and Plach, Marius and Dacasa, Hugo and Veyrinas, Kévin and Constant, Eric and Smorenburg, Peter and Wikmark, Hampus and Maclot, Sylvain and Guo, Chen and Arnold, Cord and L'Huillier, Anne and Eng-Johnsson, Per}},
  issn         = {{2765-8791}},
  language     = {{eng}},
  publisher    = {{American Association for the Advancement of Science (AAAS)}},
  series       = {{Ultrafast Science}},
  title        = {{Focusing Properties of High-Order Harmonics}},
  url          = {{http://dx.doi.org/10.34133/2021/9797453}},
  doi          = {{10.34133/2021/9797453}},
  volume       = {{2021}},
  year         = {{2021}},
}