Holographic acoustic tweezers

Marzo Pérez, Asier; Drinkwater, Bruce W.

Holographic acoustic tweezers

dc.contributor.author	Marzo Pérez, Asier
dc.contributor.author	Drinkwater, Bruce W.
dc.contributor.department	Ingeniería	es_ES
dc.contributor.department	Ingeniaritza	eu
dc.date.accessioned	2019-07-17T12:13:09Z
dc.date.available	2019-07-17T12:13:09Z
dc.date.issued	2019
dc.description.abstract	Acoustic tweezers use sound radiation forces to manipulate matter without contact. They provide unique characteristics compared with the more established optical tweezers, such as higher trapping forces per unit input power and the ability to manipulate objects from the micrometer to the centimeter scale. They also enable the trapping of a wide range of sample materials in various media. A dramatic advancement in optical tweezers was the development of holographic optical tweezers (HOT) which enabled the independent manipulation of multiple particles leading to applications such as the assembly of 3D microstructures and the probing of soft matter. Now, 20 years after the development of HOT, we present the realization of holographic acoustic tweezers (HAT). We experimentally demonstrate a 40-kHz airborne HAT system implemented using two 256-emitter phased arrays and manipulate individually up to 25 millimetric particles simultaneously. We show that the maximum trapping forces are achieved once the emitting array satisfies Nyquist sampling and an emission phase discretization below π/8 radians. When considered on the scale of a wavelength, HAT provides similar manipulation capabilities as HOT while retaining its unique characteristics. The examples shown here suggest the future use of HAT for novel forms of displays in which the objects are made of physical levitating voxels, assembly processes in the micrometer and millimetric scale, as well as positioning and orientation of multiple objects which could lead to biomedical applications.	en
dc.description.sponsorship	This project has been funded by the UK Engineering and Physical Science Research Council (EP/N014197/1).	en
dc.format.extent	6 p.
dc.format.mimetype	application/pdf	en
dc.format.mimetype	application/zip	en
dc.identifier.doi	10.1073/pnas.1813047115
dc.identifier.issn	0027-8424 (Print)
dc.identifier.issn	1091-6490 (Electronic)
dc.identifier.uri	https://academica-e.unavarra.es/handle/2454/33587
dc.language.iso	eng	en
dc.publisher	National Academy of Sciences	en
dc.relation.ispartof	Proceedings of The National Academy of Sciences, 116 (1), 84-89	en
dc.relation.publisherversion	https://doi.org/10.1073/pnas.1813047115
dc.rights	This open access article is distributed under Creative Commons Attribution-NonCommercial- NoDerivatives License 4.0	en
dc.rights.accessRights	info:eu-repo/semantics/openAccess
dc.rights.uri	https://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject	Acoustic levitation	en
dc.subject	Acoustic tweezers	en
dc.subject	Acoustophoresis	en
dc.subject	Contactless manipulation	en
dc.subject	Displays	en
dc.title	Holographic acoustic tweezers	en
dc.type	info:eu-repo/semantics/article
dc.type.version	info:eu-repo/semantics/publishedVersion
dspace.entity.type	Publication
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