Background-free coherent Raman spectroscopy by detecting the spectral phase of molecular vibrations.
We propose and demonstrate a new approach to subtracting high nonresonant background in coherent anti-Stokes Raman scattering spectroscopy. The method is based on the retrieval of the spectral phase of molecular vibrations using the technique of frequency-resolved optical gating of Raman scattering. In the presence of high nonresonant background the retrieved phase corresponds directly to the background-free spectrum of the coherent Raman response.
Department of Chemistry and The Laboratory for Advanced Imaging and Spectroscopic Research (LASIR), The University of British Columbia, Vancouver, BC, Canada.
Xiaoji G
XG
Xu
Stanislav O
SO
Konorov
John W
JW
Hepburn
Valery
V
Milner