Surface plasma resonance in XE clusters studied by EUV PUMP-NIR probe experiments

K. Nagaya, T. Sakai, T. Nishiyama Hiraki, S. Yase, K. Matsunami, K. Asa, H. Fukuzawa, K. Motomura, Y. Kumagai, W. Q. Xu, S. Wada, H. Hayashita, N. Saito, M. Nagasono, T. Togashi, M. Yabashi, K. Ueda

Research output: Contribution to journalArticlepeer-review

Abstract

The ionization dynamics of Xe cluster was analyzed by extreme ultraviolet (EUV) pump-near infrared (NIR) probe experiments. The experiments were carried out for Xe clusters containing around 5000 atoms on average at the SPring-8 Compact SASE Source (SCSS) test accelerator in Japan. We recorded ion spectra emitted from Xe clusters as a function of the time delay between the EUV and NIR pulses. The ion yields up to highly-charged states were substantially enhanced when Xe clusters excited by the EUV pulses were illuminated by the NIR laser pulses at 1 to 2 ps after the pump pulse, providing a compelling evidence for nano-plasma formation and subsequent NIR absorption via surface plasma resonance. We also observed emergence of low kinetic energy Xe+ at long time delay, which can be attributed to the ionization of excited neutral atoms resulting from the electron-ion recombination in the expanding nano-plasma.

Original languageEnglish
Article number015014
Pages (from-to)1-7
Number of pages7
JournalJournal of Physics Communications
Volume5
Issue number1
DOIs
Publication statusPublished - 2021
Externally publishedYes

Keywords

  • Cluster
  • Free electron laser
  • Surface plasma resonance

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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