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Coherent oscillations of a levitated birefringent microsphere in vacuum driven by nonconservative rotation-translation coupling
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SYSNO ASEP 0533784 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Coherent oscillations of a levitated birefringent microsphere in vacuum driven by nonconservative rotation-translation coupling Author(s) Arita, Y. (GB)
Simpson, Stephen Hugh (UPT-D) RID, SAI
Zemánek, Pavel (UPT-D) RID, SAI, ORCID
Dholakia, K. (GB)Number of authors 4 Article number eaaz9858 Source Title Science Advances. - : American Association for the Advancement of Science - ISSN 2375-2548
Roč. 6, č. 23 (2020)Number of pages 8 s. Publication form Print - P Language eng - English Country US - United States Keywords optical binding ; force ; dynamics ; particle Subject RIV BH - Optics, Masers, Lasers OECD category Optics (including laser optics and quantum optics) R&D Projects GA19-17765S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UPT-D - RVO:68081731 UT WOS 000540787200026 EID SCOPUS 85086624401 DOI 10.1126/sciadv.aaz9858 Annotation We demonstrate an effect whereby stochastic, thermal fluctuations combine with nonconservative optical forces to break detailed balance and produce increasingly coherent, apparently deterministic motion for a vacuum-trapped particle. The particle is birefringent and held in a linearly polarized Gaussian optical trap. It undergoes oscillations that grow rapidly in amplitude as the air pressure is reduced, seemingly in contradiction to the equipartition of energy. This behavior is reproduced in direct simulations and captured in a simplified analytical model, showing that the underlying mechanism involves nonsymmetric coupling between rotational and translational degrees of freedom. When parametrically driven, these self-sustained oscillators exhibit an ultranarrow linewidth of 2.2 mu Hz and an ultrahigh mechanical quality factor in excess of 2 x 10(8) at room temperature. Last, nonequilibrium motion is seen to be a generic feature of optical vacuum traps, arising for any system with symmetry lower than that of a perfect isotropic microsphere in a Gaussian trap. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2021 Electronic address https://advances.sciencemag.org/content/6/23/eaaz9858
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