Marincan Pardede, Indra Karnadi, Zener Sukra Lie, Eric Jobiliong, Ivan Tanra, Rinda Hedwig, Alion Mangasi Marpaung, Hery Suyanto, Maria Margaretha Suliyanti, Dennis Kwaria, Tjung Jie Lie, Koo Hendrik Kurniawan, Kiichiro Kagawa
This study demonstrates a new approach for suppressing the self-absorption effect in single-pulse laser-induced breakdown spectroscopy (LIBS) using unusual parallel laser irradiation. A nanosecond Nd:YAG laser with a wavelength of 1064 nm was fired parallel to and focused at a very close distance of 1 mm to the sample surface. The experiment was carried out in air at atmospheric pressure. In this configuration, the sample was ablated by a shockwave generated from the air breakdown plasma formed near the sample surface. Under this condition, we successfully obtained spectra of the resonance emission line for high concentration K (K I 766.4 nm and K I 769.9 nm) that are free from self-reversal and weakly affected by the self-absorption. Furthermore, the quantitative analysis results for the element K showed that a linear calibration curve over a wide concentration range could be achieved, which indicates the effectiveness of this technique in reducing the self-absorption effect and improving the analytical performance of ordinary single-pulse LIBS. © 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Department of Electrical Engineering, University of Pelita Harapan, Tangerang, 15811, Indonesia; Department of Electrical Engineering, Krida Wacana Christian University, Jakarta, 11470, Indonesia; Automotive and Robotics Program, Computer Engineering Department, Binus ASO School of Engineering, Bina Nusantara University, Jakarta, 11480, Indonesia; Computer Engineering Department, Faculty of Engineering, Bina Nusantara University, Jakarta, 11480, Indonesia; Faculty of Mathematics and Natural Sciences, Jakarta State University, Jakarta, 13220, Indonesia; Department of Physics, Faculty of Mathematics and Natural Sciences, Udayana University, Denpasar, 80361, Indonesia; Research Center for Physics, Indonesia Institute of Science, Kompleks Puspiptek, Banten, Tangerang Selatan, 15314, Indonesia; Research Center of Maju Makmur Mandiri Foundation, Jakarta, 11630, Indonesia; Fukui Science Education Academy, Takagi Chuo 2 Chome, Fukui, 910-0804, Japan
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