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Characterization of 3-Color CARS in a 2-Pulse Broadband CARS Spectrum



Young Jong Lee, Marcus T. Cicerone, Yuexin Liu


We present a new and simple approach to broadband coherent anti-Stokes Raman scattering (CARS) microscopy that yields background-free vibrational spectra. We present evidence for a mechanism where two different frequency components in a continuum pulse (pump/Stokes) populate molecules to vibrationally excited states and a subsequent narrowband pulse (probe) induces anti-Stokes Raman emission. This one-laser, two-pulse pump-probe configuration allows straightforward and complete suppression of the non-resonant contribution by delaying the second (probe) pulse. The resulting spectra exhibit background-free resonant peaks in the fingerprint region (<2000 cm-1).
Optics Letters


CARS, coherent anti-Stokes Raman scattering, non-invasive imaging, non-resonant background, optical microscopy, time-resolved spectroscopy


Lee, Y. , Cicerone, M. and Liu, Y. (2007), Characterization of 3-Color CARS in a 2-Pulse Broadband CARS Spectrum, Optics Letters, [online], (Accessed June 23, 2024)


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Created November 14, 2007, Updated October 12, 2021