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Nonequilibrium dynamics induced by scattering forces for optically trapped nanoparticles in strongly inertial regimes
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SYSNO ASEP 0504932 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Nonequilibrium dynamics induced by scattering forces for optically trapped nanoparticles in strongly inertial regimes Author(s) Amarouchene, Y. (FR)
Mangeat, M. (FR)
Montes, B.V. (FR)
Ondič, Lukáš (FZU-D) RID, ORCID
Guerin, T. (FR)
Dean, D.S. (FR)
Louyer, Y. (FR)Number of authors 7 Article number 183901 Source Title Physical Review Letters. - : American Physical Society - ISSN 0031-9007
Roč. 122, č. 18 (2019), s. 1-6Number of pages 6 s. Language eng - English Country US - United States Keywords optical trapping ; tweezers ; non-equilibrium dynamics Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) Method of publishing Limited access Institutional support FZU-D - RVO:68378271 UT WOS 000467404300008 EID SCOPUS 85065794785 DOI 10.1103/PhysRevLett.122.183901 Annotation The forces acting on optically trapped particles are commonly assumed to be conservative. Nonconservative scattering forces induce toroidal currents in overdamped liquid environments, with negligible effects on position fluctuations. However, their impact in the underdamped regime remains unexplored. Here, we study the effect of nonconservative scattering forces on the underdamped nonlinear dynamics of trapped nanoparticles at various air pressures. These forces induce significant low-frequency position fluctuations along the optical axis and the emergence of toroidal currents in both position and velocity variables. Our experimental and theoretical results provide fundamental insights into the functioning of optical tweezers and a means for investigating nonequilibrium steady states induced by nonconservative forces.
Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2020 Electronic address https://doi.org/10.1103/physrevlett.122.183901
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