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Optical binding of polystyrene particles in tractor beam
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SYSNO ASEP 0494359 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Optical binding of polystyrene particles in tractor beam Author(s) Damková, Jana (UPT-D) RID, ORCID, SAI
Chvátal, Lukáš (UPT-D) RID, ORCID, SAI
Oulehla, Jindřich (UPT-D) RID, ORCID, SAI
Ježek, Jan (UPT-D) RID, ORCID, SAI
Brzobohatý, Oto (UPT-D) RID, ORCID, SAI
Zemánek, Pavel (UPT-D) RID, SAI, ORCIDNumber of authors 6 Source Title Recent Trends in Charged Particle Optics and Surface Physics Instrumentation. Proceedings of the 16th International Seminar. - Brno : Institute of Scientific Instruments The Czech Academy of Sciences, 2018 - ISBN 978-80-87441-23-7 Pages s. 12-13 Number of pages 2 s. Publication form Print - P Action Recent Trends in Charged Particle Optics and Surface Physics Instrumentation Event date 04.06.2018 - 08.06.2018 VEvent location Skalský dvůr Country CZ - Czech Republic Event type WRD Language eng - English Country CZ - Czech Republic Keywords optical binding ; self-organization ; optical force ; tractor beam ; holographic video microscopy Subject RIV JA - Electronics ; Optoelectronics, Electrical Engineering OECD category Optics (including laser optics and quantum optics) R&D Projects GA14-16195S GA ČR - Czech Science Foundation (CSF) TE01020233 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) LO1212 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) ED0017/01/01 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UPT-D - RVO:68081731 UT WOS 000450591400002 Annotation The motion of a particle illuminated by a laser beam is usually driven by the photon flow due
to the radiation pressure and therefore for particle trapping, one has to employ gradient forces. But in a tractor beam, objects are illuminated by the uniform light intensity and even so they can be pulled against the beam propagation. There have been developed several techniques how to create such a tractor beam. In our case, the tractor beam is created by two identical Gaussian beams that interfere under the defined angle. It creates the
standing wave, where in the transversal plane the particle is trapped by means of the gradient
force, but in the total beam propagation direction, the particle manipulation is driven by the non-conservative force. It is remarkable that this force can for the specific combinations of
parameters pull the micro-particle against the beam propagation. This kind of behavior is
because of the particle scattering where the majority of the incident photons is scattered in the forward direction and, based on the principle of action and reaction, the transfer of
momentum leads to a backward movement of the object. The pushing and pulling force is
sensitive to the polarization of the laser beam, its incident angle and the particle size so this
technique can be used for example for sorting of objects of different sizes.Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2019
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