Time-resolved shadowgraphs and morphology analyses of aluminum ablation with multiple femtosecond laser pulses

被引：4
|
作者：
Wu, Zehua [1 ]
Zhang, Nan [2 ]
Zhu, Xiaonong [2 ]
An, Liqun [1 ]
Wang, Gangzhi [1 ]
Tan, Ming [1 ]
机构：
[1] Tianjin Univ Sci & Technol, Sch Sci, Dept Phys, Tianjin 300222, Peoples R China
[2] Nankai Univ, Minist Educ, Inst Modern Opt, Key Lab Optoelect Informat Sci & Technol, Tianjin 300071, Peoples R China
来源：
CHINESE PHYSICS B | 2018年 / 27卷 / 07期
基金：
中国国家自然科学基金;
关键词：
femtosecond laser ablation; ultrafast phenomena; time-resolved shadowgraphs; morphology analyses; OPTICAL ABSORPTANCE; METALS; SURFACE; AIR; FIELD; MICROSTRUCTURES; SEPARATION; DIAGNOSIS; WATER;
D O I：
10.1088/1674-1056/27/7/077901
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Aluminum ablation by multiple femtosecond laser pulses is investigated via time-resolved shadowgraphs and scanning electron microscope (SEM) images of the ablation spot. The spatial distribution of the ejected material and the radius of the shock wave generated during the ablation are found to vary with the increase in the number of pulses. In the initial two pulses, nearly concentric and semicircular stripes within the shock wave front are observed, unlike in subsequent pulses. Ablation by multiple femtosecond pulses exhibits different characteristics compared with the case induced by single femtosecond pulse because of the changes to the aluminum target surface induced by the preceding pulses.
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页数：7
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