Number of the records: 1
Transverse spin forces and non-equilibrium particle dynamics in a circularly polarized vacuum optical trap
- 1.
SYSNO ASEP 0498705 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Transverse spin forces and non-equilibrium particle dynamics in a circularly polarized vacuum optical trap Author(s) Svak, Vojtěch (UPT-D) RID, SAI
Brzobohatý, Oto (UPT-D) RID, ORCID, SAI
Šiler, Martin (UPT-D) RID, ORCID, SAI
Jákl, Petr (UPT-D) RID, ORCID, SAI
Kaňka, Jan (UPT-D) RID, SAI
Zemánek, Pavel (UPT-D) RID, SAI, ORCID
Simpson, Stephen Hugh (UPT-D) RID, SAINumber of authors 7 Article number 5453 Source Title Nature Communications. - : Nature Publishing Group - ISSN 2041-1723
Roč. 9, č. 1 (2018)Number of pages 8 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords optical trapping ; optical levitation ; counter-propagating beams ; optical spin force ; non-conservative force ; non-equilibrium dynamics Subject RIV BH - Optics, Masers, Lasers OECD category Optics (including laser optics and quantum optics) R&D Projects GB14-36681G GA ČR - Czech Science Foundation (CSF) LO1212 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UPT-D - RVO:68081731 UT WOS 000454137600034 EID SCOPUS 85058909640 DOI https://doi.org/10.1038/s41467-018-07866-8 Annotation We provide a vivid demonstration of the mechanical effect of transverse spin momentum in an optical beam in free space. This component of the Poynting momentum was previously thought to be virtual, and unmeasurable. Here, its effect is revealed in the inertial motion of a probe particle in a circularly polarized Gaussian trap, in vacuum. Transverse spin forces combine with thermal fluctuations to induce a striking range of non-equilibrium phenomena. With increasing beam power we observe (i) growing departures from energy equipartition, (ii) the formation of coherent, thermally excited orbits and, ultimately, (iii) the ejection of the particle from the trap. As well as corroborating existing measurements of spin momentum, our results reveal its dynamic effect. We show how the under-damped motion of probe particles in structured light fields can expose the nature and morphology of optical momentum flows, and provide a testbed for elementary non-equilibrium statistical mechanics. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2019
Number of the records: 1