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Coherent oscillations of a levitated birefringent microsphere in vacuum driven by nonconservative rotation-translation coupling

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    SYSNO ASEP0533784
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleCoherent 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 authors4
    Article numbereaaz9858
    Source TitleScience Advances - ISSN 2375-2548
    Roč. 6, č. 23 (2020)
    Number of pages8 s.
    Publication formPrint - P
    Languageeng - English
    CountryUS - United States
    Keywordsoptical binding ; force ; dynamics ; particle
    Subject RIVBH - Optics, Masers, Lasers
    OBOR OECDOptics (including laser optics and quantum optics)
    R&D ProjectsGA19-17765S GA ČR - Czech Science Foundation (CSF)
    Způsob publikováníOpen access
    Institutional supportUPT-D - RVO:68081731
    UT WOS000540787200026
    EID SCOPUS85086624401
    DOI10.1126/sciadv.aaz9858
    AnnotationWe 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.
    WorkplaceInstitute of Scientific Instruments
    ContactMartina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178
    Year of Publishing2021
    Electronic addresshttps://advances.sciencemag.org/content/6/23/eaaz9858
Number of the records: 1