A new optical technique, based on morphology-dependent peaks in the fluorescence spectra, is used to determine the evaporation and condensation rates of a linear stream of ethanol droplets. The droplets are monodispersed, in close proximity to one another, and impregnated with fluorescent dye molecules. On irradiation of the droplets with a single N2 laser pulse, the evaporation or condensation rates can be deduced from the wavelength shift (to the blue or to the red, respectively) of the spectrally narrow (<0.1-nm) structure-resonance peaks in the fluorescence spectra.
© 1984 Optical Society of America
Original Manuscript: March 12, 1984
Manuscript Accepted: May 1, 1984
Published: July 1, 1984
H.-M. Tzeng, K. F. Wall, M. B. Long, and R. K. Chang, "Evaporation and condensation rates of liquid droplets deduced from structure resonances in the fluorescence spectra," Opt. Lett. 9, 273-275 (1984)