Time-resolved shadowgraphs of material ejection in intense femtosecond laser ablation of aluminum

被引：188
作者：
Zhang, Nan [1 ]
Zhu, Xiaonong [1 ]
Yang, Jianjun [1 ]
Wang, Xiaolei [1 ]
Wang, Mingwei [1 ]
机构：
[1] Nankai Univ, Educ Minist China, Inst Modern Opt, Key Lab Optoelect Informat Sci & Technol, Tianjin 300071, Peoples R China
来源：
PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 16期
关键词：
D O I：
10.1103/PhysRevLett.99.167602
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The dynamic process of intense 50 fs laser ablation of aluminum is investigated by ultrafast time-resolved microscopy. A stripe pattern preceding phase explosion is clearly seen in the shadowgraph of 1 ns time delay. Intermittent material ejections are observed within the ejected plume after 2.5 and 7 ns time delay, respectively, which may be attributed to the material response to the generation of an extremely strong thermoelastic wave. Similar processes are also recorded in the ablation of silicon and glass samples, except for the glass samples, the intermittent material ejections are not found.
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