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Proceedings Paper

Non-diffracting beam synthesis used for optical trapping and delivery of sub-micron objects
Author(s): Tomáš Čižmár; Věra Kollárova; Martin Šiler; Petr Jákl; Zdeněk Bouchal; Veneranda Garcés-Chávez; Kishan Dholakia; Pavel Zemánek
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Paper Abstract

We demonstrate the use of interference between non-diffracting Bessel beams (BB) to generate a system of optical traps. They offer sub-micron particle confinement, delivery and organization over a distance of hundreds of μm. We analyze system of two identical counter-propagating BBs and the case of two co-propagating BBs with different propagation constants separately. In both of these cases, the interference results in periodic on-axis intensity oscillations involving particle confinement. Altering the phase of one of the interfering beams, the whole structure of optical traps can be shifted axially. Implementing this conveyor belt enables the particle delivery over the whole distance where the optical traps are strong enough for particle confinement. Experimentally we succeeded with generation of both of these systems. In case of two counter-propagating BBs we observed a strong sub-micron particle confinement, while in case of co-propagating BBs the confinement was observed only with help of fluid flow against the radiation pressure of both beams.

Paper Details

Date Published: 20 April 2006
PDF: 7 pages
Proc. SPIE 6195, Nanophotonics, 619507 (20 April 2006); doi: 10.1117/12.662629
Show Author Affiliations
Tomáš Čižmár, Institute of Scientific Instruments (Czech Republic)
Věra Kollárova, Palacký Univ. (Czech Republic)
Martin Šiler, Institute of Scientific Instruments (Czech Republic)
Petr Jákl, Institute of Scientific Instruments (Czech Republic)
Zdeněk Bouchal, Palacký Univ. (Czech Republic)
Veneranda Garcés-Chávez, Univ. of St. Andrews (United Kingdom)
Kishan Dholakia, Univ. of St. Andrews (United Kingdom)
Pavel Zemánek, Institute of Scientific Instruments (Czech Republic)


Published in SPIE Proceedings Vol. 6195:
Nanophotonics
David L. Andrews; Jean-Michel Nunzi; Andreas Ostendorf, Editor(s)

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