20 April 2006 Non-diffracting beam synthesis used for optical trapping and delivery of sub-micron objects
Author Affiliations +
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 Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tomáš Čižmár, Tomáš Čižmár, Věra Kollárova, Věra Kollárova, Martin Šiler, Martin Šiler, Petr Jákl, Petr Jákl, Zdeněk Bouchal, Zdeněk Bouchal, Veneranda Garcés-Chávez, Veneranda Garcés-Chávez, Kishan Dholakia, Kishan Dholakia, Pavel Zemánek, Pavel Zemánek, "Non-diffracting beam synthesis used for optical trapping and delivery of sub-micron objects", Proc. SPIE 6195, Nanophotonics, 619507 (20 April 2006); doi: 10.1117/12.662629; https://doi.org/10.1117/12.662629


Optical trapping in counter-propagating Bessel beams
Proceedings of SPIE (October 17 2004)
Optical conveyor belt for delivery of sub-micron objects
Proceedings of SPIE (April 17 2006)
Optical conveyor belt based on Bessel beams
Proceedings of SPIE (August 18 2005)
Optical binding in non-diffracting beams
Proceedings of SPIE (September 10 2006)

Back to Top