Single-shot stand-off chemical identification of powders using random Raman lasing

The task of identifying explosives, hazardous chemicals, and biological materials from a safe distance is the subject we consider. Much of the prior work on stand-off spectroscopy using light has been devoted to generating a backward-propagating beam of light that can be used drive further spectrosc...

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Published inProceedings of the National Academy of Sciences - PNAS Vol. 111; no. 34; pp. 12320 - 12324
Main Authors Hokr, Brett H., Bixler, Joel N., Noojin, Gary D., Thomas, Robert J., Rockwell, Benjamin A., Yakovlev, Vladislav V., Scully, Marlan O.
Format Journal Article
LanguageEnglish
Published United States National Academy of Sciences 26.08.2014
National Acad Sciences
SeriesFrom the Cover
Subjects
Biocompatible Materials - analysis
Chemicals
Chemistry Techniques, Analytical - instrumentation
Chemistry Techniques, Analytical - methods
Explosive Agents - analysis
Explosives
Hazardous Substances - analysis
Humans
Identification
Laser beams
Lasers
Lasing
Light
Mirrors
Optical reflection
Photons
Physical Sciences
powders
Powders - analysis
Pumps
Raman scattering
Remote Sensing Technology - instrumentation
Remote Sensing Technology - methods
Spectrometers
spectroscopy
Spectrum analysis
Spectrum Analysis, Raman - instrumentation
Spectrum Analysis, Raman - methods
toxic substances
stand-off detection
stimulated Raman scattering
remote sensing
Raman spectroscopy
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Summary:The task of identifying explosives, hazardous chemicals, and biological materials from a safe distance is the subject we consider. Much of the prior work on stand-off spectroscopy using light has been devoted to generating a backward-propagating beam of light that can be used drive further spectroscopic processes. The discovery of random lasing and, more recently, random Raman lasing provide a mechanism for remotely generating copious amounts of chemically specific Raman scattered light. The bright nature of random Raman lasing renders directionality unnecessary, allowing for the detection and identification of chemicals from large distances in real time. In this article, the single-shot remote identification of chemicals at kilometer-scale distances is experimentally demonstrated using random Raman lasing.
Bibliography:http://dx.doi.org/10.1073/pnas.1412535111
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Author contributions: B.H.H., J.N.B., B.A.R., V.V.Y., and M.O.S. designed research; B.H.H., J.N.B., G.D.N., and R.J.T. performed research; B.H.H. and V.V.Y. analyzed data; and B.H.H., J.N.B., R.J.T., B.A.R., V.V.Y., and M.O.S. wrote the paper.
Contributed by Marlan O. Scully, July 7, 2014 (sent for review May 9, 2014)
ISSN:0027-8424
1091-6490
1091-6490
DOI:10.1073/pnas.1412535111