期刊
JETP LETTERS
卷 99, 期 9, 页码 518-522出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0021364014090057
关键词
-
资金
- Russian Foundation for Basic Research [13-02-00971]
- Presidium of the Russian Academy of Sciences [24]
A mechanism of the formation of a nanotip with a nanoparticle at its top that appears in a thin metal film irradiated by a single femtosecond laser pulse has been studied experimentally and theoretically. It has been found that the nanotip appears owing to a melt flow and a nanojet formation, which is cooled and solidified. Within a proposed hydrodynamic model, the development of thermocapillary instability in the melted film is treated with the use of the Kuramoto-Sivashinsky-type hydrodynamic equation. The simulation shows that the nanojet nucleates in the form of a nanopeak in a pit on the top of a microbump (linear stage) and, then, grows in a nonlinear (explosive) regime of an increase in thermocapillary instability in good agreement with experimental data.
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