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Appl. Phys. Lett. 99, 101109 (2011); http://dx.doi.org/10.1063/1.3636436 (3 pages)

Highly selective standoff detection and imaging of trace chemicals in a complex background using single-beam coherent anti-Stokes Raman scattering

Marshall T. Bremer, Paul J. Wrzesinski, Nathan Butcher, Vadim V. Lozovoy, and Marcos Dantus

Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA

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(Received 28 March 2011; accepted 22 August 2011; published online 9 September 2011)

A non-destructive and highly selective method of standoff detection is presented and quantitatively evaluated. The method is found to be orders of magnitude more sensitive than previous coherent spectroscopy methods, identifying concentrations as low as 2 μg/cm2 of an explosive simulant mixed in a polymer matrix. The approach uses a single amplified femtosecond laser to generate high-resolution multiplex coherent anti-Stokes Raman scattering (CARS) spectra encompassing the fingerprint region (400−2500 cm−1) at standoff distance. Additionally, a standoff imaging modality is introduced, visually demonstrating similar sensitivity and high selectivity, providing promising results toward highly selective trace detection of explosives or warfare agents.

© 2011 American Institute of Physics

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KEYWORDS and PACS

PACS

  • 07.07.Df

    Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing

  • 42.65.Dr

    Stimulated Raman scattering; CARS

  • 42.65.Es

    Stimulated Brillouin and Rayleigh scattering

ARTICLE DATA

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

For access to fully linked references, you need to log in.
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