Particles dynamics in travelling optical lattices

0352216 - ÚPT 2011 RIV US eng C - Conference Paper (international conference)
Jákl, Petr - Arzola, A. V. - Zemánek, Pavel - Šiler, Martin - Volke-Sepulveda, K.
Particles dynamics in travelling optical lattices.
Optical Trapping and Optical Micromanipulation VII (Proceedings of SPIE Vol. 7762). Bellingham: SPIE, 2010, 77620Y: 1-6. ISBN 978-0-8194-8258-7.
[Optical Trapping and Optical Micromanipulation /7./. San Diego (US), 01.08.2010]
R&D Projects: GA MŠMT(CZ) LC06007; GA MŠMT ED0017/01/01
Institutional research plan: CEZ:AV0Z20650511
Keywords : optical trapping * optical lattice * optical sorting * standing wave * optical forces
Subject RIV: BH - Optics, Masers, Lasers

We demonstrate optical manipulation and sorting of micrometer-sized dielectric particles using one-dimensional periodic interference pattern created by interference of two beams in a sample space. These beams are generated by a combined phase grating applied on the spatial light modulator which allows to set dynamically the position and spatial period of the interference pattern. If a microparticle of fixed size is placed into such pattern, the optical forces acting upon it vary according to the spatial period of this optical lattice. We show how to use this property for sorting of mixtures of particles by moving either the interference pattern or the sample chamber. The mechanism is examined both theoretically and experimentally.
Permanent Link: http://hdl.handle.net/11104/0191781