Abstract

A comprehensive investigation of laser-induced breakdown spectroscopy (LIBS) at 1.500μm of residues of six organic compounds (anthracene, caffeine, glucose, 1,3-dinitrobenzene, 2,4-dinitrophenol, and 2,4-dinitrotoluene) on aluminum substrates is presented and compared with LIBS at the Nd:YAG fundamental wavelength of 1.064μm. The overall emission intensities were found to be smaller at 1.500μm than at 1.064μm, and the ratios of C2 and CN molecular emissions to the H atomic emissions were observed to be less. Possible reasons for the observed differences in LIBS at 1.064μm versus 1.500μm are discussed.

© 2008 Optical Society of America

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