期刊
VIBRATIONAL SPECTROSCOPY
卷 50, 期 1, 页码 10-14出版社
ELSEVIER
DOI: 10.1016/j.vibspec.2008.07.009
关键词
Coherent Raman spectroscopy; CARS microscopy; Focus-engineering; Chemical interfaces
Focus-engineered coherent anti-Stokes Raman scattering (FE-CARS) microscopy is used to visualize microscopic samples with differential imaging contrast in both longitudinal and lateral directions. Multidimensional contrast is achieved by applying a one-dimensional pi-phase step in the transverse beam profile of the Stokes beam. The observed longitudinal differential contrast results from fortuitous phase-matching at axial interfaces and is highly sensitive to the resonant part of the third-order susceptibility. Based on phase-sensitive recordings of the vibrational spectrum of dimethyl sulfoxide in the CH3-stretching range, it is shown that FE-CARS uniquely probes the spectral phase of the Raman bands of the sample. (C) 2008 Elsevier B.V. All rights reserved.
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