In situ chemical analysis of geology samples by a rapid simultaneous ultraviolet/visible/near-infrared (UVN) + longwave-infrared laser induced breakdown spectroscopy detection system at standoff distance

Clayton S.C. Yang, Feng Jin, Sudhir Trivedi, Ei Brown, Uwe Hömmerich, L. Nemes, Alan C. Samuels

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The standoff detection range of the simultaneous ultraviolet/visible/near-infrared (UVN) + longwave-Infrared (LWIR) Laser Induced Breakdown Spectroscopy (LIBS) detection system has been successfully extended from merely 10 cm to ≥ 1 meter by adopting a reflecting telescope collection scheme and UVN + LWIR LIBS emission signatures were acquired in various atmospheres from soil and mineral samples. This system simultaneously captured emission signatures from atomic, and simple and complex molecular target species existing in or near the same laser-induce plasma plume within micro-seconds. These pioneer standoff measurements of UVN + LWIR LIBS signatures have revealed an abundance of plasma-generated sample molecular emitting species in their vapor state along with atomic ones which gave intense and distinct signature emissions in both UVN (conventional LIBS) and LWIR (LWIR LIBS) spectral regions. A HITRAN simulation estimates the temperatures of those vapor molecular species to be around 2500 K. Laser-induced plasma emissions in the LWIR region provided direct information on the molecular components of the sample substances. The demonstrable capability of the LWIR LIBS on in situ characterization of carbon- and oxygen-rich materials is expected to find important applications in water discovery and organic materials signatures detection and identification. As a result laser ablation spectroscopy will be greatly augmented in both fundamental knowledge of and capability for chemical analysis.

Original languageEnglish
Pages (from-to)19596-19614
Number of pages19
JournalOptics Letters
Volume27
Issue number14
DOIs
Publication statusPublished - Jan 1 2019

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laser-induced breakdown spectroscopy
geology
chemical analysis
infrared lasers
infrared spectroscopy
signatures
reflecting telescopes
vapors
organic materials
laser plasmas
laser ablation
plumes
soils
minerals
atmospheres
carbon
oxygen
estimates
water
spectroscopy

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

In situ chemical analysis of geology samples by a rapid simultaneous ultraviolet/visible/near-infrared (UVN) + longwave-infrared laser induced breakdown spectroscopy detection system at standoff distance. / Yang, Clayton S.C.; Jin, Feng; Trivedi, Sudhir; Brown, Ei; Hömmerich, Uwe; Nemes, L.; Samuels, Alan C.

In: Optics Letters, Vol. 27, No. 14, 01.01.2019, p. 19596-19614.

Research output: Contribution to journalArticle

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