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Brügger G, Froufe-Pérez LS, Scheffold F, et al. Controlling dispersion forces between small particles with artificially created random light fields. Nat Commun. 2015;6:7460doi: 10.1038/ncomms8460.
Brügger, G., Froufe-Pérez, L. S., Scheffold, F., & José Sáenz, J. (2015). Controlling dispersion forces between small particles with artificially created random light fields. Nature communications, 67460. https://doi.org/10.1038/ncomms8460
Brügger, Georges, et al. "Controlling dispersion forces between small particles with artificially created random light fields." Nature communications vol. 6 (2015): 7460. doi: https://doi.org/10.1038/ncomms8460
Brügger G, Froufe-Pérez LS, Scheffold F, José Sáenz J. Controlling dispersion forces between small particles with artificially created random light fields. Nat Commun. 2015 Jun 22;6:7460. doi: 10.1038/ncomms8460. PMID: 26096622; PMCID: PMC4557368.
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Nat Commun. 2015 Jun 22;6:7460. doi: 10.1038/ncomms8460.

Controlling dispersion forces between small particles with artificially created random light fields.

Nature communications

Georges Brügger, Luis S Froufe-Pérez, Frank Scheffold, Juan José Sáenz

Affiliations

  1. Department of Physics, University of Fribourg, Chemin du Musée 3, Fribourg CH-1700, Switzerland.
  2. Depto. de Física de la Materia Condensada, Instituto Nicolás Cabrera and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Fco. Tomas y Valiente 7, Madrid 28049, Spain.
  3. Donostia International Physics Center (DIPC), Paseo Manuel Lardizabal 4, Donostia-San Sebastian 20018, Spain.

PMID: 26096622 PMCID: PMC4557368 DOI: 10.1038/ncomms8460

Abstract

Appropriate combinations of laser beams can be used to trap and manipulate small particles with optical tweezers as well as to induce significant optical binding forces between particles. These interaction forces are usually strongly anisotropic depending on the interference landscape of the external fields. This is in contrast with the familiar isotropic, translationally invariant, van der Waals and, in general, Casimir-Lifshitz interactions between neutral bodies arising from random electromagnetic waves generated by equilibrium quantum and thermal fluctuations. Here we show, both theoretically and experimentally, that dispersion forces between small colloidal particles can also be induced and controlled using artificially created fluctuating light fields. Using optical tweezers as a gauge, we present experimental evidence for the predicted isotropic attractive interactions between dielectric microspheres induced by laser-generated, random light fields. These light-induced interactions open a path towards the control of translationally invariant interactions with tuneable strength and range in colloidal systems.

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