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Communication Dans Un Congrès Année : 2018

Selective optical manipulation of particles in acoustic levitation

Résumé

Acoustic Radiation Force (ARF) is commonly used to create stable large-scale aggregates of particles in levitation (so-called "acoustic levitation) in a micro cavity. We show in the following work that this well-known and well-controlled aggre-gation process can be reversed without contact or external flow if the aggregated particles are enlightened with the proper optical wavelength. This coupled optics and acoustics effect has been observed with various kinds of particles and different optic wavelengths, showing high reproducibility. The phenomenon is studied using fluorescent micro-metric polystyrene particles without flow, and the effects of acoustic energy and illumination power have been quantitatively assessed. Since it is a tag free phenomenon, does not need high energies to happen and that it works with biological objects such as algae, red blood cells and bacteria, it may pave the way to a broad range of applications.
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Dates et versions

hal-02369049 , version 1 (18-11-2019)

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  • HAL Id : hal-02369049 , version 1

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G Dumy, M Hoyos, Jean-Luc Aider. Selective optical manipulation of particles in acoustic levitation. 21st Australasian Fluid Mechanics Conference, Dec 2018, Adelaïde, Australia. ⟨hal-02369049⟩
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