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Chin. Phys. B, 2018, Vol. 27(7): 077901    DOI: 10.1088/1674-1056/27/7/077901

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

Zehua Wu(吴泽华)1, Nan Zhang(张楠)2, Xiaonong Zhu(朱晓农)2, Liqun An(安力群)1, Gangzhi Wang(王刚志)1, Ming Tan(谭明)1
1 Department of Physics, School of Science, Tianjin University of Science & Technology, Tianjin 300222, China;
2 Institute of Modern Optics, Nankai University, Key Laboratory of Opto-electronic Information Science and Technology, Ministry of Education, Tianjin 300071, China
Abstract  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.
Keywords:  femtosecond laser ablation      ultrafast phenomena      time-resolved shadowgraphs      morphology analyses     
Received:  03 February 2018      Published:  05 July 2018
PACS:  79.20.Eb (Laser ablation)  
  81.16.-c (Methods of micro- and nanofabrication and processing)  
  06.60.Jn (High-speed techniques)  
Fund: Project supported by the Science and Technology Development Fund Planning Project for the Universities of Tianjin, China (Grant No. 20140902), the Natural Science Foundation of Tianjin City, China (Grant No. 16JCQNJC01900), the National Natural Science Foundation of China (Grant Nos. 51376136 and 61474082), and the Science and Technology Achievement Award Project for the Universities of Tianjin, China.
Corresponding Authors:  Zehua Wu, Nan Zhang     E-mail:;

Cite this article: 

Zehua Wu(吴泽华), Nan Zhang(张楠), Xiaonong Zhu(朱晓农), Liqun An(安力群), Gangzhi Wang(王刚志), Ming Tan(谭明) Time-resolved shadowgraphs and morphology analyses of aluminum ablation with multiple femtosecond laser pulses 2018 Chin. Phys. B 27 077901

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