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Proceedings Article

Non-diffracting beam synthesis used for optical trapping and delivery of sub-micron objects

[+] Author Affiliations
Tomáš Čižmár, Martin Šiler, Petr Jákl, Pavel Zemánek

Institute of Scientific Instruments (Czech Republic)

Věra Kollárov, Zdeněk Bouchal

Palacky Univ. (Czech Republic)

Veneranda Garcés-Chávez, Kishan Dholakia

Univ. of St. Andrews (United Kingdom)

Proc. SPIE 6195, Nanophotonics, 619507 (April 20, 2006); doi:10.1117/12.662629
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From Conference Volume 6195

  • Nanophotonics
  • David L. Andrews; Jean-Michel Nunzi; Andreas Ostendorf
  • Strasbourg, France | April 03, 2006

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.

© (2006) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Tomáš Čižmár ; Věra Kollárov ; Martin Šiler ; Petr Jákl ; Zdeněk Bouchal, et al.
"Non-diffracting beam synthesis used for optical trapping and delivery of sub-micron objects", Proc. SPIE 6195, Nanophotonics, 619507 (April 20, 2006); doi:10.1117/12.662629; http://dx.doi.org/10.1117/12.662629


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