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Issue 13, 2014
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Optical trapping and binding of particles in an optofluidic stable Fabry–Pérot resonator with single-sided injection

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Abstract

In this article, microparticles are manipulated inside an optofluidic Fabry–Pérot cylindrical cavity embedding a fluidic capillary tube, taking advantage of field enhancement and multiple reflections within the optically-resonant cavity. This enables trapping of suspended particles with single-side injection of light and with low optical power. A Hermite–Gaussian standing wave is developed inside the cavity, forming trapping spots at the locations of the electromagnetic field maxima with a strong intensity gradient. The particles get arranged in a pattern related to the mechanism affecting them: either optical trapping or optical binding. This is proven to eventually translate into either an axial one dimensional (1D) particle array or a cluster of particles. Numerical simulations are performed to model the field distributions inside the cavity allowing a behavioral understanding of the phenomena involved in each case.

Graphical abstract: Optical trapping and binding of particles in an optofluidic stable Fabry–Pérot resonator with single-sided injection

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Publication details

The article was received on 24 Dec 2013, accepted on 25 Mar 2014 and first published on 26 Mar 2014


Article type: Paper
DOI: 10.1039/C3LC51438B
Citation: Lab Chip, 2014,14, 2259-2265
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    Optical trapping and binding of particles in an optofluidic stable Fabry–Pérot resonator with single-sided injection

    N. Gaber, M. Malak, F. Marty, D. E. Angelescu, E. Richalot and T. Bourouina, Lab Chip, 2014, 14, 2259
    DOI: 10.1039/C3LC51438B

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