Scanning angle Raman spectroscopy: Investigation of Raman scatter enhancement techniques for chemical analysis | Zendy

Matthew W. Meyer | Zendy

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Scanning angle Raman spectroscopy: Investigation of Raman scatter enhancement techniques for chemical analysis

Author(s) -

Matthew W. Meyer

Publication year - 2013

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/1082977

Subject(s) - raman spectroscopy , raman scattering , coherent anti stokes raman spectroscopy , optics , spectroscopy , x ray raman scattering , spectrometer , analytical chemistry (journal) , materials science , interference (communication) , chemistry , physics , telecommunications , computer science , channel (broadcasting) , chromatography , quantum mechanics

This thesis outlines advancements in Raman scatter enhancement techniques by applying evanescent fields, standing-waves (waveguides) and surface enhancements to increase the generated mean square electric field, which is directly related to the intensity of Raman scattering. These techniques are accomplished by employing scanning angle Raman spectroscopy and surface enhanced Raman spectroscopy. A 1064 nm multichannel Raman spectrometer is discussed for chemical analysis of lignin. Extending dispersive multichannel Raman spectroscopy to 1064 nm reduces the fluorescence interference that can mask the weaker Raman scattering. Overall, these techniques help address the major obstacles in Raman spectroscopy for chemical analysis, which include the inherently weak Raman cross section and susceptibility to fluorescence interference

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