Femtosecond laser ablation induced plasma characteristics from submicron craters in thin metal film
Femtosecond laser ablation induced plasma characteristics from submicron craters in thin metal film
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DOI：
10.1063/1.2825289
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发表时间：
2007-12-17
影响因子：
4
通讯作者：
Russo, Richard E.
中科院分区：
文献类型：
--
作者：
Hwang, David J.;Jeon, Hojeong;Russo, Richard E.
实验研究了减小烧蚀坑尺寸时的烧蚀等离子体物理。利用倍频飞秒激光脉冲通过物镜聚焦到镀在石英晶片上的Cr薄膜上，以获得亚微米尺度的烧蚀坑。侧视时间分辨发射图像和相应的光谱描绘了详细的等离子体演化的能量密度范围内的烧蚀阈值附近。在约两到三倍的烧蚀阈值的激光能量密度水平下收集的发射光谱显示来自亚微米烧蚀坑的烧蚀Cr材料的特征原子跃迁峰。这一发现证实，提高空间分辨率的激光诱导击穿光谱可以实现。(c)2007年，美国物理学会。
The ablation-induced plasma physics at reduced ablation crater dimensions is experimentally investigated. Frequency doubled femtosecond laser pulses are tightly focused through objective lenses onto a Cr thin film coated on quartz wafer in order to obtain ablation craters of submicron lateral dimensions. Side-view time-resolved emission images and the corresponding spectra depict the detailed plasma evolution at the fluence range near the ablation threshold. Collected emission spectra at the laser fluence level of around two to three times of ablation threshold display characteristic atomic transition peaks of the ablated Cr material from submicron ablation craters. This finding confirms that improved spatial resolution for laser-induced breakdown spectroscopy can be achieved. (c) 2007 American Institute of Physics.