| Autor: |
Katz, O., Natan, A., Rosenwaks, S., Silberberg, Y. |
| Rok vydání: |
2008 |
| Předmět: |
|
| Zdroj: |
Appl. Phys. Lett. 92, 171116 (2008) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1063/1.2918014 |
| Popis: |
We demonstrate a single-beam, standoff (>10m) coherent anti-Stokes Raman scattering spectroscopy (CARS) of various materials, including trace amounts of explosives and nitrate samples, under ambient light conditions. The multiplex measurement of characteristic molecular vibrations with <20cm-1 spectral resolution is carried out using a single broadband (>550cm-1) phase-shaped femtosecond laser pulse. We exploit the strong nonresonant background signal for amplification of the weak backscattered resonant CARS signal by using a homodyne detection scheme. This facilitates a simple, highly sensitive single-beam spectroscopic technique, with a potential for hazardous materials standoff detection applications. |
| Databáze: |
arXiv |
| Externí odkaz: |
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