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Brillouin Spectroscopy of a Plastic Film

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Brillouin Spectroscopy of a Plastic Film

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A small piece of plastic wrap (common food wrap) was suspended above a 20X microscope objective. The thickness of the plastic film is 7.2 ± 0.2 μm, as measured with a Heidenhain apparatus. This corresponds to ~ 30 % of the excitation/collection focal volume depth of the objective, which is ~ 25 μm along the z-axis.

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