Highly selective standoff detection and imaging of trace chemicals in a complex background using single-beam coherent anti-Stokes Raman scattering
| Autor: | Paul J. Wrzesinski, Marcos Dantus, Marshall T. Bremer, Vadim V. Lozovoy, Nathan Butcher |
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| Rok vydání: | 2011 |
| Předmět: |
Physics and Astronomy (miscellaneous)
Explosive material Chemistry business.industry Laser law.invention symbols.namesake Optics Orders of magnitude (time) law Femtosecond symbols Optoelectronics Coherent anti-Stokes Raman spectroscopy business Raman spectroscopy Coherent spectroscopy Raman scattering |
| Zdroj: | Applied Physics Letters. 99:101109 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.3636436 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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