Modeling of ablation threshold dependence on pulse duration for dielectrics with ultrashort pulsed laser
文献类型：期刊论文
| 作者 | Zhu, Jianqiang; Sun, Mingying; Lin, Zunqi |
| 刊名 | Opt. Eng.
 |
| 出版日期 | 2017 |
| 卷号 | 56期号:1 |
| 通讯作者 | sunmy@siom.ac.cn |
| 英文摘要 | We present a numerical model of plasma formation in ultrafast laser ablation on the dielectrics surface. Ablation threshold dependence on pulse duration is predicted with the model and the numerical results for water agrees well with the experimental data for pulse duration from 140 fs to 10 ps. Influences of parameters and approximations of photo- and avalanche-ionization on the ablation threshold prediction are analyzed in detail for various pulse lengths. The calculated ablation threshold is strongly dependent on electron collision time for all the pulse durations. The complete photoionization model is preferred for pulses shorter than 1 ps rather than the multiphoton ionization approximations. The transition time of inverse bremsstrahlung absorption needs to be considered when pulses are shorter than 5 ps and it can also ensure the avalanche ionization (AI) coefficient consistent with that in multiple rate equations (MREs) for pulses shorter than 300 fs. The threshold electron density for AI is only crucial for longer pulses. It is reasonable to ignore the recombination loss for pulses shorter than 100 fs. In addition to thermal transport and hydrodynamics, neglecting the threshold density for AI and recombination could also contribute to the disagreements between the numerical and the experimental results for longer pulses. (C) 2016 Society of Photo-Optical Instrumentation Engineers (SPIE) |
| 收录类别 | SCI |
| 资助信息 | Open Research Fund of State Key Laboratory of Pulsed Power Laser Technology, Electronic Engineering Institute [SKL2014KF05]; Fund of Key Laboratory of High Power Laser and Physics, Chinese Academy of Sciences [CXJJ-16S040] |
| WOS记录号 | WOS:000396389400029 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/27883]  |
| 专题 | 上海光学精密机械研究所_高功率激光物理国家实验室 |
| 作者单位 | 中国科学院上海光学精密机械研究所 |
| 推荐引用方式 GB/T 7714 | Zhu, Jianqiang,Sun, Mingying,Lin, Zunqi. Modeling of ablation threshold dependence on pulse duration for dielectrics with ultrashort pulsed laser[J]. Opt. Eng.,2017,56(1). |
| APA | Zhu, Jianqiang,Sun, Mingying,&Lin, Zunqi.(2017).Modeling of ablation threshold dependence on pulse duration for dielectrics with ultrashort pulsed laser.Opt. Eng.,56(1). |
| MLA | Zhu, Jianqiang,et al."Modeling of ablation threshold dependence on pulse duration for dielectrics with ultrashort pulsed laser".Opt. Eng. 56.1(2017). |
入库方式： OAI收割
来源：上海光学精密机械研究所
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