Abstract

The influence of crater depth on plasma properties and laser-induced breakdown spectroscopy (LIBS) emission has been evaluated. Laser-induced plasmas were generated at the surface and at the bottom of different craters in a copper sample. Plasmas produced at the sample surface and at the bottom of the craters were spatially and temporally resolved. LIBS emission, temperature, and electronic number density of the plasmas were evaluated. It is shown that the confinement effect produced by the craters enhances the LIBS signal from the laser-induced plasmas.

Characteristics of spectral lines with crater development during laser-induced breakdown spectroscopy

Kuohu Li, Lianbo Guo, Xiangyou Li, Zhongqi Hao, Jiaming Li, Xinyan Yang, Meng Shen, Qingdong Zeng, Yongfeng Lu, and Xiaoyan Zeng
Appl. Opt. 55(26) 7422-7427 (2016)

Optimally enhanced optical emission in laser-induced breakdown spectroscopy by combining spatial confinement and dual-pulse irradiation

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Opt. Express 20(2) 1436-1443 (2012)

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Opt. Express 22(7) 7686-7693 (2014)

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Youbo Zhao, Sima Singha, Yaoming Liu, and Robert J. Gordon
Opt. Lett. 34(4) 494-496 (2009)

Nanometer-film analysis by the laser-induced breakdown spectroscopy method: the effects of laser focus to sample distance

Yuxiang Sun, Shilei Zhong, Fukai Shan, Yuan Lu, Xin Sun, Zhe Liu, and Pengpeng Sheng
Appl. Opt. 54(15) 4812-4819 (2015)