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Crystals 2016, 6(10), 123; doi:10.3390/cryst6100123

Numerical and Experimental Study of Optoelectronic Trapping on Iron-Doped Lithium Niobate Substrate

1
Department of Electrical, Computer and Biomedical Engineering, University of Pavia, Via Ferrata 5A, 27100 Pavia, Italy
2
Physics and Astronomy Department, University of Padua, via Marzolo 8, 35131 Padova, Italy
3
Currently at Institute of Applied Physics, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
4
Currently at Department of Biomedical Science and Translational Medicine, Università di Milano, Via Vanvitelli 32, 20133 Milano, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Maria-Pilar Bernal
Received: 19 July 2016 / Revised: 16 August 2016 / Accepted: 2 September 2016 / Published: 23 September 2016
(This article belongs to the Special Issue Lithium Niobate Crystals)
View Full-Text   |   Download PDF [3649 KB, uploaded 23 September 2016]   |  

Abstract

Optoelectronic tweezers (OET) are a promising technique for the realization of reconfigurable systems suitable to trap and manipulate microparticles. In particular, dielectrophoretic (DEP) forces produced by OET represent a valid alternative to micro-fabricated metal electrodes, as strong and spatially reconfigurable electrical fields can be induced in a photoconductive layer by means of light-driven phenomena. In this paper we report, and compare with the experimental data, the results obtained by analyzing the spatial configurations of the DEP-forces produced by a 532 nm laser beam, with Gaussian intensity distribution, impinging on a Fe-doped Lithium Niobate substrate. Furthermore, we also present a promising preliminary result for water-droplets trapping, which could open the way to the application of this technique to biological samples manipulation. View Full-Text
Keywords: dielectrophoretic force; optoelectronic tweezers; photorefractive effect; space-charge field; numerical simulations; optical trapping dielectrophoretic force; optoelectronic tweezers; photorefractive effect; space-charge field; numerical simulations; optical trapping
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Gazzetto, M.; Nava, G.; Zaltron, A.; Cristiani, I.; Sada, C.; Minzioni, P. Numerical and Experimental Study of Optoelectronic Trapping on Iron-Doped Lithium Niobate Substrate. Crystals 2016, 6, 123.

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