Filament-induced remote surface ablation for long range laser-induced breakdown spectroscopy operation |
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| Institution: | 1. Department of Chemistry, The MOE Key Lab of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, China;2. State Key Laboratory of Marine Environmental Science, Xiamen University, China;1. Embrapa Instrumentation, P.O. Box 741, 13560-970 São Carlos, SP, Brazil;2. CNR, Istituto di Nanotecnologia (NANOTEC) – PLASMI Lab, Bari, 70126, Bari, Italy;3. Instituto de Física, Universidade Federal do Mato Grosso do Sul, P.O. Box 549, 79070-900 Campo Grande, MS, Brazil;4. Embrapa Solos, Rua Jardim Botânico 1024, 22460-000 Rio de Janeiro, RJ, Brazil |
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| Abstract: | We demonstrate laser induced ablation and plasma line emission from a metallic target at distances up to 180 m from the laser, using filaments (self-guided propagation structures ～ 100 μm in diameter and ～ 5 × 1013 W/cm2 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. |
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