Lee, Y.
, Cicerone, M.
and Liu, Y.
(2007),
Characterization of 3-Color CARS in a 2-Pulse Broadband CARS Spectrum, Optics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852761
(Accessed October 14, 2025)
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Characterization of 3-Color CARS in a 2-Pulse Broadband CARS Spectrum
Published
Author(s)
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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
Pub Type
Journals
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Keywords
CARS, coherent anti-Stokes Raman scattering, non-invasive imaging, non-resonant background, optical microscopy, time-resolved spectroscopy
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Created November 14, 2007, Updated October 12, 2021