超短脉冲照射下氟化锂的烧蚀机理及其超快动力学研究
文献类型：期刊论文
| ; | |
| 作者 | 李晓溪 ; 贾天卿 ; 冯东海 ; 孙海轶 ; 徐世珍 ; 李成斌 ; 王晓峰 ; 徐至展 |
| 刊名 | 光学学报
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| 出版日期 | 2005 |
| 卷号 | 25期号:11页码:1526 |
| 关键词 | 非线性光学 nonlinear optics 超快动力学 ultra-fast dynamics 飞秒激光 femtosecond laser LiF晶体 LiF crystal 雪崩模型 avalanche mode 抽运-探针技术 pump-probe technology |
| ISSN号 | 0253-2239 |
| 其他题名 | The Ablation Mechanism and Ultra-Fast Dynamics Property of Lithium Fluoride with the Ultra-Short Pulse Laser |
| 中文摘要 | 研究了超短脉冲激光照射下LiF晶体的破坏机理及其超快动力学过程，利用扫描电镜和原子力显微镜等测试手段，观测了飞秒激光照射下LiF晶体的烧蚀形貌。利用烧蚀面积与激光脉冲能量的对数关系确定了LiF晶体的破坏阈值，并利用非线性玻璃棒展宽脉宽，得到了800nm激光作用下LiF破坏阈值对激光脉宽（50～1000fs）的依赖关系；利用抽运一探针超快探测平台，探测了LiF烧蚀过程中反射率的变化。采用雪崩击穿模型，并根据晶体材料反射率与材料的介电常量的依赖关系，通过数值计算，模拟了材料烧蚀阈值与脉宽的依赖关系及材料激发过; The ablation mechanism and ultra-fast dynamics property of LiF crystal are studied. By means of SEM and AFM the damage features induced by femtosecond laser are observed. Based on the logarithmic dependence of the ablated area on laser pulse energy, the ablation threshold fluence of LiF crystal is calculated. Meanwhile, stretching the pulse duration up to 800 fs with dispersive material, the threshold fluence of LiF is got as a function of pulse duration. By use of pump-probe technique, the dependence of reflectivity of LiF crystal on delay time is got while irradiated by 800 nm femtosecond laser with 70 fs and 500 fs pulse duration respectively. Then based on the avalanche mode and the relationship between the reflectivity and the dielectric constant, a calculation in theory is made. The theoretical calculation results agree well with the experimental results. Finally the variety of the density of conduction band electrons in the ablation process is discussed and the experimental result with avalanche mode is interpreted. |
| 学科主题 | 激光技术;激光物理与基本理论 |
| 分类号 | O437.5 |
| 收录类别 | ei |
| 语种 | 中文 |
| 公开日期 | 2009-09-18 ; 2010-10-12 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/318]  |
| 专题 | 上海光学精密机械研究所_强场激光物理国家重点实验室 |
| 推荐引用方式 GB/T 7714 | 李晓溪,贾天卿,冯东海,等. 超短脉冲照射下氟化锂的烧蚀机理及其超快动力学研究, The Ablation Mechanism and Ultra-Fast Dynamics Property of Lithium Fluoride with the Ultra-Short Pulse Laser[J]. 光学学报,2005,25(11):1526, 1530. |
| APA | 李晓溪.,贾天卿.,冯东海.,孙海轶.,徐世珍.,...&徐至展.(2005).超短脉冲照射下氟化锂的烧蚀机理及其超快动力学研究.光学学报,25(11),1526. |
| MLA | 李晓溪,et al."超短脉冲照射下氟化锂的烧蚀机理及其超快动力学研究".光学学报 25.11(2005):1526. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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