Abstract

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

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

H.-M. Tzeng, M. B. Long, R. K. Chang, and P. W. Barber
Opt. Lett. 10(5) 209-211 (1985)

Laser emission from individual droplets at wavelengths corresponding to morphology-dependent resonances

H.-M. Tzeng, K. F. Wall, M. B. Long, and R. K. Chang
Opt. Lett. 9(11) 499-501 (1984)

Measuring evaporation rates of laser-trapped droplets by use of fluorescent morphology-dependent resonances

Robert Pastel and Allan Struthers
Appl. Opt. 40(15) 2510-2514 (2001)

Scattering photometer for measuring single ice crystals and evaporation and condensation rates of liquid droplets

Antonino Pluchino
J. Opt. Soc. Am. A 4(3) 614-620 (1987)

Structural resonances observed in the Raman spectra of optically levitated liquid droplets

Rudolf Thurn and Wolfgang Kiefer
Appl. Opt. 24(10) 1515-1519 (1985)