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Search: WFRF:(Appi Elisa)

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1.
  • Plach, Marius, et al. (author)
  • Spatial Aberrations in High-Order Harmonic Generation
  • 2024
  • In: Ultrafast Science. - 2097-0331. ; 4
  • Journal article (peer-reviewed)abstract
    • We investigate the spatial characteristics of high-order harmonic radiation generated in argon and observe cross-like patterns in the far field. An analytical model describing harmonics from an astigmatic driving beam reveals that these patterns result from the order and generation position-dependent divergence of harmonics. Even small amounts of driving field astigmatism may result in cross-like patterns, coming from the superposition of individual harmonics with spatial profiles elongated in different directions. By correcting the aberrations using a deformable mirror, we show that fine-tuning the driving wavefront is essential for optimal spatial quality of the harmonics.
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2.
  • Weissenbilder, Robin, et al. (author)
  • Hyperbolic trend in optimization of high-order harmonic generation in gases
  • 2023
  • In: 2023 Conference on Lasers and Electro-Optics, CLEO 2023. - 9781957171258
  • Conference paper (peer-reviewed)abstract
    • We demonstrate, using analytic models, simulations and experiments, that efficient generation of high-order harmonics is possible across a large range of parameters, if the density and medium length follow a hyperbolic equation.
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