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Longitudinal optical trapping and sizing of aerosol droplets

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)14238-14244
Number of pages7
JournalOptics Express
Issue number13
DatePublished - 21 Jun 2010


We present evidence that aerosol droplets, similar to 1-2 mu m in diameter, can be optically bound over a 4mm distance within a volume formed by the overlap of the central cores and rings of two counterpropagating Bessel beams. The sizes of the individual polydisperse aerosol particles can be estimated from the angular variation of the elastic light scattering. Scattered light from the two orthogonally polarized trapping beams and from a Gaussian probe beam of different wavelength can be used to provide independent estimations of size. The coalescence of two droplets was observed and characterized. (C) 2010 Optical Society of America



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