Nanoscale hydrodynamic instability in a molten thin gold film induced by femtosecond laser ablation

被引：26

作者：

Emel'yanov, V. I. ^{[1
]}

Zayarniy, D. A. ^{[2
]}

Ionin, A. A. ^{[2
]}

Kiseleva, I. V. ^{[2
,3
]}

Kudryashov, S. I. ^{[2
]}

Makarov, S. V. ^{[2
]}

Nguyen, T. H. T. ^{[2
,3
]}

Rudenko, A. A. ^{[2
]}

机构：

[1] Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119991, Russia

[2] Russian Acad Sci, Lebedev Phys Inst, Moscow 119991, Russia

[3] State Univ, Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Russia

来源：

JETP LETTERS | 2014年 / 99卷 / 09期

基金：

俄罗斯基础研究基金会;

关键词：

IRRADIATION; FABRICATION; DYNAMICS; PULSES;

D O I：

10.1134/S0021364014090057

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页码：518 / 522

页数：5

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