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Femtosecond resonance enhanced CARS for background-free detection of organic molecules |
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| Authors: | Aleksander Rebane Mikhail Drobizhev Mikalai Kruk Aliaksandr Karotki Imbi Tehver Marlan Scully |
| Affiliation: | 1. Department of Physics , Montana State University , Bozeman, MT 59717, USA;2. Permanent address: Lebedev Physics Institute , Leninsky pr., 53, 119991 Moscow, Russia;3. Institute of Molecular and Atomic Physics , 220072 Minsk, Belarus;4. Institute of Physics , Tartu University , Riia 142, Tartu 51014, Estonia;5. Department of Physics , Texas A &6. M University , College Station, TX 77843-4242, USA |
| Abstract: | We study the coherent excitation profile (CEP) of resonance enhanced femtosecond CARS in a model system zinc phthalocyanine in a polymer film host as a prospective technique for detection and identification of molecular species in ambient environments. A new method of suppressing the non-resonant FWM background is demonstrated. Transform theory is applied to calculate CEP based on the absorption spectrum, and good agreement between theory and experiment is obtained. |
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