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Detecting lateral interfaces with focus‐engineered coherent anti‐Stokes Raman scattering microscopy
Author(s) -
Krishnamachari Vishnu Vardhan,
Potma Eric Olaf
Publication year - 2008
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1887
Subject(s) - raman scattering , raman spectroscopy , microscopy , laser , optics , focus (optics) , coherent anti stokes raman spectroscopy , materials science , beam (structure) , scattering , laser beams , nanotechnology , chemistry , physics
Focus‐engineered coherent anti‐Stokes Raman scattering (FE‐CARS) microscopy is used to highlight the lateral interfaces between chemically distinct media. Interface highlighting is achieved by using a HG10 mode for the Stokes laser beam and a HG00 mode for the pump laser beam in the forward detection scheme. The spectral and the orientation dependence of FE‐CARS are found to be in agreement with theoretical predictions. A brief discussion on the relevance of this technique for imaging third‐order nonlinear susceptibility interfaces in thin samples of biological or chemical importance is presented. Copyright © 2008 John Wiley & Sons, Ltd.