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Proceedings Paper

Aerosol tweezing with a super-continuum laser beam
Author(s): Marc Guillon; Kishan Dholakia; David McGloin
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Paper Abstract

Aerosol tweezing with a super-continuum laser source has been successfully demonstrated. Salt-water droplets in the range between 3 and 7 microns in diameters are trapped with a 300nm-wide super-continuum spectrum. As the spectrum covers a few Mie resonances, the optical force is averaged and the trapping efficiency varies smoothly with the square of the radius as in the case of the ray optics approximation. On-axis elastically back-scattered spectrum allows a direct and precise determination of the trapped droplet. Evaporation of a single droplet is precisely followed using this method. Alternative spectroscopic droplet sizing techniques are proposed and discussed.

Paper Details

Date Published: 29 August 2008
PDF: 9 pages
Proc. SPIE 7038, Optical Trapping and Optical Micromanipulation V, 70381Q (29 August 2008); doi: 10.1117/12.793726
Show Author Affiliations
Marc Guillon, Univ. of Dundee (United Kingdom)
Kishan Dholakia, Univ. of St. Andrews (United Kingdom)
David McGloin, Univ. of Dundee (United Kingdom)

Published in SPIE Proceedings Vol. 7038:
Optical Trapping and Optical Micromanipulation V
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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