A fast <i>in situ</i> sizing technique for single levitated aerosol particles is presented. It makes use of the analysis of fast-Fourier-transformed vertically polarized Mie scattering patterns from single liquid aerosols levitated in a Paul-trap-type electrodynamic balance. The technique is shown to give reliable results for a test sphere of known physical properties. A first application to aqueous sodium chloride aerosol particles that changed size on humidity variation is presented, yielding good agreement with the full Mie theory.
© 1999 Optical Society of America
(010.1110) Atmospheric and oceanic optics : Aerosols
(070.2590) Fourier optics and signal processing : ABCD transforms
(070.5010) Fourier optics and signal processing : Pattern recognition
(290.4020) Scattering : Mie theory
(290.5820) Scattering : Scattering measurements
Björn Steiner, Burkhard Berge, Ralf Gausmann, Jens Rohmann, and Eckart Rühl, "Fast in situ Sizing Technique for Single Levitated Liquid Aerosols," Appl. Opt. 38, 1523-1529 (1999)