期刊
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
卷 60, 期 7-8, 页码 1025-1033出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sab.2005.03.017
关键词
laser filaments; remote laser-induced surface ablation; remote laser-induced breakdown spectroscopy
类别
We demonstrate laser induced ablation and plasma line emission from a metallic target at distances up to 180 in from the laser, using filaments (self-guided propagation structures similar to 100 mu m in diameter and similar to 5 x 10(13) W/cm(2) in intensity) appearing as femtosecond and terawatt laser pulses propagating in air. The remarkable property of filaments to propagate over a long distance independently of the diffraction limit opens the frontier to long range operation of the laser-induced breakdown spectroscopy technique. We call this special configuration of remote laser-induced breakdown spectroscopy remote filament-induced breakdown spectroscopy. Our results show main features of filament-induced ablation on the surface of a metallic sample and associated plasma emission. Our experimental data allow us to estimate requirements for the detection system needed for kilometer-range remote filament- induced breakdown spectroscopy experiment. (c) 2005 Elsevier B.V. All rights reserved.
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