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

Published

November 15, 2007

Author(s)

Young Jong Lee, Marcus T. Cicerone, Yuexin Liu

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

Citation

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 17, 2025)