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).
, Cicerone, M.
and Liu, Y.
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 December 4, 2023)