Abstract

ArF-laser-produced microplasmas in CO, CO₂, methanol, and chloroform are studied by time-resolved emission measurements of the plasma decay. Electron densities are deduced from Stark broadening of the line profiles of atomic H, C, O, and Cl. Plasma ionization and excitation temperatures are determined from measurements of relative populations of ionic and neutral species produced in the plasmas. A discussion of the thermodynamic equilibrium status of ArF-laser microplasmas is presented. In general, the ArF-laser-produced microplasma environment is found to be similar in all the gases studied, in terms of both temperature (15,000–20,000 K) and electron density (10¹⁷ cm⁻³–10¹⁸ cm⁻³), despite the considerable differences observed in the breakdown thresholds and relative energies deposited in the various gases.

© 1993 Optical Society of America

Ultraviolet laser microplasma–gas chromatography detector: detection of species-specific fragment emission

Randy J. Locke, Jeffrey B. Morris, Brad E. Forch, and Andrzej W. Miziolek
Appl. Opt. 29(33) 4987-4992 (1990)

Laser-induced carbon plasma emission spectroscopic measurements on solid targets and in gas-phase optical breakdown

László Nemes, Anna M. Keszler, James O. Hornkohl, and Christian G. Parigger
Appl. Opt. 44(18) 3661-3667 (2005)

Optical emission enhancement of laser-produced copper plasma under a steady magnetic field

Yu Li, Changhong Hu, Hanzhuang Zhang, Zhankui Jiang, and Zhongshan Li
Appl. Opt. 48(4) B105-B110 (2009)

Characterization of local thermodynamic equilibrium in a laser-induced aluminum alloy plasma

Yong Zhang, Zhenyang Zhao, Tao Xu, GuangHui Niu, Ying Liu, and Yixiang Duan
Appl. Opt. 55(10) 2741-2747 (2016)

Laser induced breakdown spectroscopy and acoustic response techniques to discriminate healthy and cancerous breast tissues

Fatemeh Ghasemi, Parviz Parvin, Najme Sadat Hosseini Motlagh, Ahmad Amjadi, and Shahriar Abachi
Appl. Opt. 55(29) 8227-8235 (2016)