Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 111, Issue 34, Pages 12320-12324Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1412535111
Keywords
remote sensing; Raman spectroscopy; stimulated Raman scattering; stand-off detection
Categories
Funding
- National Science Foundation (NSF) [ECCS-1250360, DBI-1250361, CBET-1250363, PHY-1241032, ECC-0540832]
- Robert A. Welch Foundation [A-1261]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1250363] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1250360] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1241032] Funding Source: National Science Foundation
- Div Of Biological Infrastructure
- Direct For Biological Sciences [1250361] Funding Source: National Science Foundation
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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.
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