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More on infrared LIBS; before Starshot, there was Sailbeam.
A European team uses an underwater LIBS setup to analyze ancient objects in the Mediterranean Sea. [Image by J.J. Laserna]
“LIBS Continues to Evolve” (OPN, May 2017, p. 42) depicted a number of recent advances in laser-induced breakdown spectroscopy (LIBS), including the observation of infrared emissions from laser-generated plasmas. In these infrared LIBS spectra, the signatures are not atomic electronic transitions, as observed in traditional LIBS, but molecular vibrational transitions, which extends LIBS into the broad discipline of molecular spectroscopy.
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