Rapid long-wave infrared laser-induced breakdown spectroscopy measurements using a mercury-cadmium-telluride linear array detection system.

Applied optics

PubMedID: 26836525

Yang CS, Brown E, Kumi-Barimah E, Hommerich U, Jin F, Jia Y, Trivedi S, D'souza AI, DeCuir EA, Wijewarnasuriya PS, Samuels AC. Rapid long-wave infrared laser-induced breakdown spectroscopy measurements using a mercury-cadmium-telluride linear array detection system. Appl Opt. 2015;54(33):9695-702.
In this work, we develop a mercury-cadmium-telluride linear array detection system that is capable of rapidly capturing (~1-5??s) a broad spectrum of atomic and molecular laser-induced breakdown spectroscopy (LIBS) emissions in the long-wave infrared (LWIR) region (~5. 6-10??µm). Similar to the conventional UV-Vis LIBS, a broadband emission spectrum of condensed phase samples covering the whole 5. 6-10 µm region can be acquired from just a single laser-induced microplasma or averaging a few single laser-induced microplasmas. Atomic and molecular signature emission spectra of solid inorganic and organic tablets and thin liquid films deposited on a rough asphalt surface are observed. This setup is capable of rapidly probing samples "as is" without the need of elaborate sample preparation and also offers the possibility of a simultaneous UV-Vis and LWIR LIBS measurement.