Exploring Femtosecond Laser Ablation by Snapshot Ultrafast
Imaging and Molecular Dynamics Simulation

Jiali Yao; Dalong Qi; Hongtao Liang; Yilin He; Yunhua Yao; Tianqing Jia; Yang Yang; Zhenrong Sun; and Shian Zhang

doi:10.34133/2022/9754131

Exploring Femtosecond Laser Ablation by Snapshot Ultrafast Imaging and Molecular Dynamics Simulation

doi: 10.34133/2022/9754131

a State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal niversity,Shanghai 200241, China
b Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
c Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan 250358, China

基金项目:

This work was partly supported by the National Natural Science Foundation of China (91850202, 92150301, 12074121, 62105101, 62175066, 11727810, 12034008) and the Science and Technology Commission of Shanghai Municipality (21XD1400900, 20ZR1417100, 21JM0010700).

详细信息

通讯作者:
Correspondence should be addressed to Yang Yang

yyang@phy.ecnu.edu.cn and Shian Zhang

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出版历程
- 收稿日期: 2022-07-12
- 修回日期: 2022-10-02
- 刊出日期: 2022-10-20

Exploring Femtosecond Laser Ablation by Snapshot Ultrafast Imaging and Molecular Dynamics Simulation

a State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal niversity,Shanghai 200241, China
b Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
c Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan 250358, China

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摘要

摘要: Femtosecond laser ablation (FLA) has been playing a prominent role in precision fabrication of material because of its circumvention of thermal effect and extremely high spatial resolution. Molecular dynamics modeling, as a powerful tool to study the mechanism of femtosecond laser ablation, still lacks the connection between its simulation results and experimental observations at present. Here we combine a single-shot chirped spectral mapping ultrafast photography (CSMUP) technique in experiment and a three-dimensional two-temperature model-based molecular dynamics (3D TTM-MD) method in theory to jointly investigate the FLA process of bulky gold. Our experimental and simulated results show quite high consistency in time-resolved morphologic dynamics. According to the highly accurate simulations, the FLA process of gold at the high laser fluence is dominated by the phase explosion, which shows drastic vaporized cluster eruption and pressure dynamics,while the FLA process at the low laser fluence mainly results from the photomechanical spallation, which shows moderate temperature and pressure dynamics. This study reveals the ultrafast dynamics of gold with different ablation schemes,which has a guiding significance for the applications of FLA on various kinds of materials.
- Ultrafast imaging /
- laser ablation /
- ultrafast laser /
- two-temperature model /
- molecular dynamics
Abstract: Femtosecond laser ablation (FLA) has been playing a prominent role in precision fabrication of material because of its circumvention of thermal effect and extremely high spatial resolution. Molecular dynamics modeling, as a powerful tool to study the mechanism of femtosecond laser ablation, still lacks the connection between its simulation results and experimental observations at present. Here we combine a single-shot chirped spectral mapping ultrafast photography (CSMUP) technique in experiment and a three-dimensional two-temperature model-based molecular dynamics (3D TTM-MD) method in theory to jointly investigate the FLA process of bulky gold. Our experimental and simulated results show quite high consistency in time-resolved morphologic dynamics. According to the highly accurate simulations, the FLA process of gold at the high laser fluence is dominated by the phase explosion, which shows drastic vaporized cluster eruption and pressure dynamics,while the FLA process at the low laser fluence mainly results from the photomechanical spallation, which shows moderate temperature and pressure dynamics. This study reveals the ultrafast dynamics of gold with different ablation schemes,which has a guiding significance for the applications of FLA on various kinds of materials.
- Ultrafast imaging /
- laser ablation /
- ultrafast laser /
- two-temperature model /
- molecular dynamics

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Exploring Femtosecond Laser Ablation by Snapshot Ultrafast Imaging and Molecular Dynamics Simulation

doi: 10.34133/2022/9754131

通讯作者:
Correspondence should be addressed to Yang Yang

yyang@phy.ecnu.edu.cn and Shian Zhang

计量

Exploring Femtosecond Laser Ablation by Snapshot Ultrafast Imaging and Molecular Dynamics Simulation

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留言板

Exploring Femtosecond Laser Ablation by Snapshot Ultrafast Imaging and Molecular Dynamics Simulation

doi: 10.34133/2022/9754131

通讯作者: Correspondence should be addressed to Yang Yang yyang@phy.ecnu.edu.cn and Shian Zhang

计量

出版历程

Exploring Femtosecond Laser Ablation by Snapshot Ultrafast Imaging and Molecular Dynamics Simulation

计量

出版历程

目录

通讯作者:
Correspondence should be addressed to Yang Yang

yyang@phy.ecnu.edu.cn and Shian Zhang