中国物理B ›› 2018, Vol. 27 ›› Issue (7): 77901-077901.doi: 10.1088/1674-1056/27/7/077901

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

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

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)   

  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
  • 收稿日期:2018-02-03 修回日期:2018-04-06 出版日期:2018-07-05 发布日期:2018-07-05
  • 通讯作者: Zehua Wu, Nan Zhang E-mail:wuzehua@tust.edu.cn;zhangn@nankai.edu.cn
  • 基金资助:
    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.

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. 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
  • Received:2018-02-03 Revised:2018-04-06 Online:2018-07-05 Published:2018-07-05
  • Contact: Zehua Wu, Nan Zhang E-mail:wuzehua@tust.edu.cn;zhangn@nankai.edu.cn
  • Supported by:
    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.

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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.

关键词: femtosecond laser ablation, ultrafast phenomena, time-resolved shadowgraphs, morphology analyses

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.

Key words: femtosecond laser ablation, ultrafast phenomena, time-resolved shadowgraphs, morphology analyses

中图分类号:  (Laser ablation)

  • 79.20.Eb
81.16.-c (Methods of micro- and nanofabrication and processing) 06.60.Jn (High-speed techniques)