Open AccessSurface plasma resonance in Xe clusters studied by EUV pump-NIR probe experiments
Author(s) -
K. Nagaya,
Tsukasa Sakai,
Toshiyuki Nishiyama Hiraki,
S Yase,
K. Matsunami,
Kazuki Asa,
H. Fukuzawa,
K. Motomura,
Yoshiaki Kumagai,
Wenzhen Xu,
S. Wada,
H. Hayashita,
Norio Saitô,
Mitsuru Nagasono,
Tadashi Togashi,
Makina Yabashi,
Kiyoshi Ueda
Publication year - 2021
Publication title -
journal of physics communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.407
H-Index - 17
ISSN - 2399-6528
DOI - 10.1088/2399-6528/abdafa
Subject(s) - extreme ultraviolet lithography , atomic physics , extreme ultraviolet , excited state , ionization , ion , plasma , xenon , resonance (particle physics) , chemistry , laser , materials science , optics , physics , optoelectronics , organic chemistry , quantum mechanics
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.