Polarization resolved laser-induced breakdown spectroscopy of Al.
Polarization resolved laser-induced breakdown spectroscopy of Al.
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DOI：
10.1021/jp904728n
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发表时间：
2009-11
期刊：
影响因子：
--
通讯作者：
John S. Penczak;Yaoming Liu;R. Gordon
中科院分区：
文献类型：
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作者：
John S. Penczak;Yaoming Liu;R. Gordon
结果表明，由800 nm飞秒脉冲产生的Al的激光诱导击穿光谱的连续背景是强偏振的。使用偏振器滤除背景显著地改善了离散线光谱的信号/噪声和信号/背景比。研究了激光脉冲能量、聚焦位置、入射角、探测角以及激光偏振面等因素的影响。偏振分辨激光诱导击穿光谱（PRLIBS）对这些变量的敏感性比传统的非门控fs-LIBS低得多，使其成为一种更加通用的分析工具。这些测量揭示了光谱的连续和离散部分的定性不同机制。
It is shown that the continuous background of the laser-induced breakdown spectrum of Al produced by 800 nm femtosecond pulses is strongly polarized. Use of a polarizer to filter out the background significantly improves the signal/noise and signal/background ratios of the discrete line spectrum. The effects of the laser pulse energy, focal position, incidence and detection angles, and the polarization plane of the laser were investigated. Polarization resolved laser-induced breakdown spectroscopy (PRLIBS) is much less sensitive to these variables than conventional, ungated fs-LIBS, making this a much more versatile analytical tool. These measurements reveal qualitatively different mechanisms for the continuous and discrete parts of the spectrum.