Abstract

A XeCl excimer laser (20 ns, 15-70 mJ) has been focused on a Zn plate in surrounding gas at low pressures (100-1500 Pa). The characteristics of the resultant plasma are examined with the use of a unique time-resolved spectroscopic method. A density jump in the distribution of Zn atoms is clearly observed, which indicates the generation of a shock wave. Furthermore, it is proved that the relationships among the displacement length of the front of the emission of the Zn neutral emission line, the pressure of the ambient gas, and the energy of the laser pulse are in good agreement with the theoretical result for a blast wave explosion. An application is also presented to show that the plasma induced by a blast wave is excellent as a light source for emission spectrochemical analysis because of its very low background emission intensity.

Direct evidence of laser-induced shock wave plasma from organic targets in low pressure He ambient gas, showing the effect of target hardness on its propagation speed and the resulted spectral performance

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Appl. Opt. 56(36) 9876-9881 (2017)

Formation and emission characteristics of CN molecules in laser induced low pressure He plasma and its applications to N analysis in coal and fossilization study

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Appl. Opt. 55(7) 1731-1737 (2016)

Influence of surface roughness on nanosecond laser-induced shock wave enhancement effects

Lei Chen, Chuan Guo, Zelin Liu, Hao Liu, Minsun Chen, Zhongjie Xu, Guomin Zhao, and Kai Han
Appl. Opt. 61(29) 8859-8863 (2022)

Practical and highly sensitive elemental analysis for aqueous samples containing metal impurities employing electrodeposition on indium-tin oxide film samples and laser-induced shock wave plasma in low-pressure helium gas

Koo Hendrik Kurniawan, Marincan Pardede, Rinda Hedwig, Syahrun Nur Abdulmadjid, Kurnia Lahna, Nasrullah Idris, Eric Jobiliong, Hery Suyanto, Maria Margaretha Suliyanti, May On Tjia, Tjung Jie Lie, Zener Sukra Lie, Davy Putra Kurniawan, and Kiichiro Kagawa
Appl. Opt. 54(25) 7592-7597 (2015)

Spectral analysis of the acoustic emission of laser-produced plasmas

Santiago Palanco and Javier Laserna
Appl. Opt. 42(30) 6078-6084 (2003)