Abstract

Optical tweezers have proven to be indispensable micromanipulation tools especially in aqueous solutions. Because of the significantly larger spherical aberration induced by the refractive index mismatch, trapping aerosols has always been cumbersome if not impossible. We introduce a simple but very efficient method for optimized aerosol trapping at a desired depth. We show that a wise selection of the immersion medium and the mechanical tube length not only enables trapping of objects that are known to be untrappable but also provides a way to tune the trappable depth range.

© 2015 Optical Society of America

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Supplementary Material (1)

NameDescription
» Visualization 1: MOV (2568 KB)      A typical trapping experiment of a 400 nm polystyrene bead.

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