16 September 2016 Characterizing particle pairs optically bound in "tractor beam"
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Abstract
We report on an experimental and theoretical study of optical binding of polystyrene sphere pairs illuminated by retro-reflected wide Gaussian beam, so-called "tractor beam". We show that depending on configuration of particle pairs, optically bound structure in the "tractor beam" can be pushed or pulled against the beam propagation. We employ holographic video microscopy to analyse object positions in three dimensions and their time evolution. In such a way, we investigate their dynamics in dependence on the geometrical configuration that is compared with numerical simulations. We observe strong dependence of the particle pair motion on the relative distance of the particles.
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Jana Damková, Jana Damková, Lukáš Chvátal, Lukáš Chvátal, Oto Brzobohatý, Oto Brzobohatý, Vojtěch Svak, Vojtěch Svak, Martin Šiler, Martin Šiler, Stephen Simpson, Stephen Simpson, Pavel Zemánek, Pavel Zemánek, } "Characterizing particle pairs optically bound in "tractor beam"", Proc. SPIE 9922, Optical Trapping and Optical Micromanipulation XIII, 99221Q (16 September 2016); doi: 10.1117/12.2237572; https://doi.org/10.1117/12.2237572
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