A microscopy system has been constructed that is capable of simultaneously acquiring both traditional Raman spectra as well as angle-resolved elastic-scattering patterns using a single focused laser spot less than 10 mum wide. The elastic-scattering signal was analyzed by generalized Lorenz-Mie theory, representing what we believe to be the first experimental validation of the theory's prediction of angular backscatter from single spheres. The microscope system exhibits 3 nm precision in predicting sphere diameters, while simultaneously yielding high-quality Raman signals. Applications to single cell analysis are envisioned.
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Smith et al. (2008) studied this question.
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