Abstract

We report the experimental evidence of shock wave plasma generation by direct observation of the plasma propagation using 68 mJ 1064 nm Nd-doped yttrium aluminum garnet laser irradiation on a relatively soft organic sample in He ambient gas at 2 kPa. The density jump associated with the arrival of the plasma front at a certain position is detected by means of the highly sensitive interferometric technique, in conjunction with the observation of the first appearance of the plasma emission at the same position and time of the plasma front arrival. The result shows that the plasma front moves at the Sedov speed, which is typical of shock wave propagation, yielding an excellent emission spectrum for the harder sample. The shock front speed is further found to decrease in the case of a softer sample, resulting in lesser spectroscopic performance, as demonstrated by the emission spectra measured from mochi samples of different hardnesses. The result of this study is promising for paving the way to extending the laser-induced breakdown spectroscopy application to the much needed spectrochemical analysis of agricultural and food products.

© 2017 Optical Society of America

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

Kurnia Lahna, Rinaldi Idroes, Nasrullah Idris, Syahrun Nur Abdulmadjid, Koo Hendrik Kurniawan, May On Tjia, Marincan Pardede, and Kiichiro Kagawa
Appl. Opt. 55(7) 1731-1737 (2016)

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)

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)

Radiative model of post-breakdown laser-induced plasma expanding into ambient gas

A. Ya. Kazakov, I. B. Gornushkin, N. Omenetto, B. W. Smith, and J. D. Winefordner
Appl. Opt. 45(12) 2810-2820 (2006)

Effect of laser intensity on temporal and spectral features of laser generated acoustic shock waves: ns versus ps laser pulses

E. Manikanta, L. Vinoth Kumar, Ch. Leela, and P. Prem Kiran
Appl. Opt. 56(24) 6902-6910 (2017)