Optical binding of polystyrene particles in tractor beam

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F18%3A00494359" target="_blank" >RIV/68081731:_____/18:00494359 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Optical binding of polystyrene particles in tractor beam

Original language description

The motion of a particle illuminated by a laser beam is usually driven by the photon flow duento 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 thenstanding wave, where in the transversal plane the particle is trapped by means of the gradientnforce, 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 ofnparameters pull the micro-particle against the beam propagation. This kind of behavior isnbecause 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 ofnmomentum leads to a backward movement of the object. The pushing and pulling force isnsensitive to the polarization of the laser beam, its incident angle and the particle size so thisntechnique can be used for example for sorting of objects of different sizes.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

10306 - Optics (including laser optics and quantum optics)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Recent Trends in Charged Particle Optics and Surface Physics Instrumentation. Proceedings of the 16th International Seminar

ISBN

978-80-87441-23-7

ISSN

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e-ISSN

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Number of pages

2

Pages from-to

12-13

Publisher name

Institute of Scientific Instruments The Czech Academy of Sciences

Place of publication

Brno

Event location

Skalský dvůr

Event date

Jun 4, 2018

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000450591400002