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

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Author(s): Young J. Lee; Marcus T. Cicerone; Yuexin Liu;
Title: Characterization of 3-Color CARS in a 2-Pulse Broadband CARS Spectrum
Published: November 15, 2007
Abstract: 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).
Citation: Optics Letters
Volume: 32
Issue: 22
Pages: pp. 3370 - 3372
Keywords: CARS,coherent anti-Stokes Raman scattering,non-invasive imaging,non-resonant background,optical microscopy,time-resolved spectroscopy
Research Areas: Spectroscopy, Biomaterials
PDF version: PDF Document Click here to retrieve PDF version of paper (351KB)