飞秒
材料科学
超短脉冲
激光器
表面张力
辐照
皮秒
表面应力
放松(心理学)
光学
各向异性
热力学
复合材料
物理
核物理学
社会心理学
心理学
表面能
作者
Chenhao Li,Hongtao Liang,Yongqiang Yang,Zhiyong Yu,Xin Zhang,Xiuli Ma,Wenliang Lu,Zhenrong Sun,Y. Frank Cheng
标识
DOI:10.1088/0256-307x/39/7/077901
摘要
We predict ultrafast modulation of the pure molten metal surface stress fields under the irradiation of the single femtosecond laser pulse through the two-temperature model molecular-dynamics simulations. High-resolution and precision calculations are used to resolve the ultrafast laser-induced anisotropic relaxations of the pressure components on the time-scale comparable to the intrinsic liquid density relaxation time. The magnitudes of the dynamic surface tensions are found being modulated sharply within picoseconds after the irradiation, due to the development of the nanometer scale non-hydrostatic regime behind the exterior atomic layer of the liquid surfaces. The reported novel regulation mechanism of the liquid surface stress field and the dynamic surface tension hints at levitating the manipulation of liquid surfaces, such as ultrafast steering the surface directional transport and patterning.
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