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Opt Lett. 1985 May 1;10(5):209-11.

Laser-induced shape distortions of flowing droplets deduced from morphology-dependent resonances in fluorescence spectra.


Low-energy laser irradiation (~0.15 microJ) on a Rhodamine 6G ethanol droplet (radius, 21.1 microm) flowing in a linear stream has been shown to induce damped oscillations in the wavelengths at which the morphology-dependent resonances (MDR's) in the fluorescence are located. Such oscillatory behavior of the MDR's is consistent with those calculated for the elastic scattering from a large sphere that oscillates with small amplitudes (5 parts in 10(4)) from a sphere to a prolate spheroid and then to an oblate spheroid. The observed damped oscillations provide information on the surface tension and viscosity of an ethanol droplet.

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