| Author(s): |
Young Jong 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: |
 Click here to retrieve PDF version of paper (343KB) |
