Observation of a transient insulating phase of metals and semiconductors during short-pulse laser ablation
Observation of a transient insulating phase of metals and semiconductors during short-pulse laser ablation
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短脉冲激光烧蚀过程中金属和半导体瞬态绝缘相的观察
DOI：
10.1016/s0169-4332(97)00736-8
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发表时间：
1998
影响因子：
6.7
通讯作者：
D. Linde
中科院分区：
文献类型：
--
作者：
K. Sokolowski;J. Bialkowski;A. Cavalleri;D. Linde
研究了飞秒激光烧蚀不同材料表面的动力学过程。结合泵浦-探测技术与光学显微镜，我们已经监测了辐照表面在空间和时间上的结构修改。在低于等离子体形成阈值的注量范围内，烧蚀是由激光加热材料的流体动力学膨胀引起的。在膨胀到真空中时，所研究的材料（Si、GaAs、Al、Au、Mg、Hg）中的每一种从初始金属状态演变成具有高折射率的光学透明相。
We have investigated the dynamics of femtosecond laser-induced ablation from the surface of various materials. Combining pump–probe techniques with optical microscopy we have monitored the structural modifications of the irradiated surfaces both in space and time. In the fluence regime below the threshold for plasma formation ablation is caused by the hydrodynamic expansion of laser-heated material. Upon expansion into vacuum each of the investigated materials (Si, GaAs, Al, Au, Mg, Hg) evolves from the initial metallic state into an optically transparent phase with high index of refraction.