'Lissajous-like' trajectories in optical tweezers

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F15%3A00467069" target="_blank" >RIV/68081731:_____/15:00467069 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1364/OE.23.031716" target="_blank" >http://dx.doi.org/10.1364/OE.23.031716</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1364/OE.23.031716" target="_blank" >10.1364/OE.23.031716</a>

Result language

angličtina

Original language name

'Lissajous-like' trajectories in optical tweezers

Original language description

When a microscopic particle moves through a low Reynolds number fluid, it creates a flow-field which exerts hydrodynamic forces on surrounding particles. In this work we study the 'Lissajous-like' trajectories of an optically trapped 'probe' microsphere as it is subjected to time-arying oscillatory hydrodynamic flow-fields created by a nearby moving particle (the 'actuator'). We show a breaking of time-reversal symmetry in the motion of the probe when the driving motion of the actuator is itself time-reversal symmetric. This symmetry breaking results in a fluid-pumping effect, which arises due to the action of both a time-dependent hydrodynamic flow and a position-dependent optical restoring force, which together determine the trajectory of the probe particle. We study this situation experimentally, and show that the form of the trajectories observed is in good agreement with Stokesian dynamics simulations. Our results are related to the techniques of active micro-rheology and flow measurement, and also highlight how the mere presence of an optical trap can perturb the environment it is in place to measure.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BH - Optics, masers and lasers

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

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

Name of the periodical

Optics Express

ISSN

1094-4087

e-ISSN

—

Volume of the periodical

23

Issue of the periodical within the volume

25

Country of publishing house

US - UNITED STATES

Number of pages

12

Pages from-to

31716-31727

UT code for WoS article

000366687200010

EID of the result in the Scopus database

2-s2.0-84959378213