Název: Optical binding of polystyrene particles in tractor beam
Autoři: Damková, Jana ; Chvátal, Lukáš ; Oulehla, Jindřich ; Ježek, Jan ; Brzobohatý, Oto ; Zemánek, Pavel
Typ dokumentu: Příspěvky z konference
Konference/Akce: Recent Trends in Charged Particle Optics and Surface Physics Instrumentation, Skalský dvůr (CZ), 20180604
Rok: 2018
Jazyk: eng
Abstrakt: The motion of a particle illuminated by a laser beam is usually driven by the photon flow due\nto 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\nstanding wave, where in the transversal plane the particle is trapped by means of the gradient\nforce, 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\nparameters pull the micro-particle against the beam propagation. This kind of behavior is\nbecause 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\nmomentum leads to a backward movement of the object. The pushing and pulling force is\nsensitive to the polarization of the laser beam, its incident angle and the particle size so this\ntechnique can be used for example for sorting of objects of different sizes.
Klíčová slova: holographic video microscopy; optical binding; optical force; self-organization; tractor beam
Číslo projektu: GA14-16195S (CEP), TE01020233 (CEP), LO1212 (CEP), ED0017/01/01
Poskytovatel projektu: GA ČR, GA TA ČR, GA MŠk, GA MŠk
Zdrojový dokument: Recent Trends in Charged Particle Optics and Surface Physics Instrumentation. Proceedings of the 16th International Seminar, ISBN 978-80-87441-23-7

Instituce: Ústav přístrojové techniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0287587

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-387498


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav přístrojové techniky
Konferenční materiály > Příspěvky z konference