Spatial Variation in the Raman Spectrum of Sr Ti O3
With traditional Raman sources the observed spectra were spatial averages of the Raman scattering over a large volume of the sample. Since the advent of the laser with its high degree of spatial coherence, the beam can be easily focused to a 10μ cross-section, allowing one to explore possible spatial variation in the Raman scattering. This technique is particularly useful for the study of crystals which exhibit domain structure since it permits distinction between the true bulk spectrum and possible effects associated with inhomogeneities at domain boundaries.
KeywordsDomain Wall Raman Scattering Raman Intensity Strontium Titanate Beam Position
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