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1 results

  • High harmonic generation and ionization effects in cluster targets

  • Part of
  • M. Aladi, I. Márton, P. Rácz, P. Dombi, I.B. Földes
  • Journal:
    High Power Laser Science and Engineering / Volume 2 / 01 July 2014
    Published online by Cambridge University Press:
    25 September 2014, e32
    • Article
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  • High harmonic generation in gas jets was investigated in different gases up to more than 14 bar backing pressure. The observation of increase of harmonic intensity with increasing pressure and laser intensity shows evidence of the presence of clusters in Xe with an increased efficiency compared with He, whereas Ar is an intermediate case for which clusters will start to dominate above a certain backing pressure. Spectral investigations give evidence for tunable harmonic generation in a broad spectral range. A spectral shift of opposite signature caused by the free electrons in the focal volume and the nanoplasmas inside the cluster was observed.