Formation of x-ray Newton’s rings from nano-scale spallation shells of metals in laser ablation

Autor: Masaharu Nishikino, Noboru Hasegawa, Takuro Tomita, Yasuo Minami, Takashi Eyama, Naoya Kakimoto, Rui Izutsu, Motoyoshi Baba, Tetsuya Kawachi, Tohru Suemoto
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: AIP Advances, Vol 7, Iss 1, Pp 015311-015311-5 (2017)
Druh dokumentu: article
ISSN: 2158-3226
DOI: 10.1063/1.4975218
Popis: The initial stages of the femtosecond (fs) laser ablation process of gold, platinum, and tungsten were observed by single-shot soft x-ray imaging technique. The formation and evolution of soft x-ray Newton’s rings (NRs) were found for the first time. The soft x-ray NRs are caused by the interference between the bulk ablated surface and nanometer-scale thin spallation layer; they originate from the metal surface at pump energy fluence of around 1 J/cm2 and work as a flying soft x-ray beam splitter.
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