Abstract
We describe a procedure for identifying morphology-dependent resonances observed in various optical processes in micrometer-sized droplets. This capability results from the use of a vibrating-orifice aerosol generator in which the radius a of a droplet stream is repeatedly ramped between fixed values, providing characteristic size spectra. When acquired in conjunction with other optical data (such as fluorescence, lasing, and Raman scattering), fixed-angle elastic scattering provides a fiducial spectrum from which mode positions are assigned and transferred. From Lorenz–Mie theory calculations, spectral spans of ≈0.1a are shown to be sufficient to yield unambiguous mode identification, given an initial experimental uncertainty of ±1.5° in the scattering angle and ±6% in the refractive index.
© 1990 Optical Society of America
Full Article | PDF ArticleMore Like This
H-B. Lin, A. L. Huston, J. D. Eversole, and A. J. Campillo
J. Opt. Soc. Am. B 7(10) 2079-2089 (1990)
J. D. Eversole, H-B. Lin, and A. J. Campillo
Appl. Opt. 31(12) 1982-1991 (1992)
A. L. Huston, H.-B. Lin, J. D. Eversole, and A. J. Campillo
J. Opt. Soc. Am. B 13(3) 521-531 (1996)