Transverse spin forces and non-equilibrium particle dynamics in a circularly polarized vacuum optical trap

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F18%3A00498705" target="_blank" >RIV/68081731:_____/18:00498705 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1038/s41467-018-07866-8" target="_blank" >http://dx.doi.org/10.1038/s41467-018-07866-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41467-018-07866-8" target="_blank" >10.1038/s41467-018-07866-8</a>

Result language

angličtina

Original language name

Transverse spin forces and non-equilibrium particle dynamics in a circularly polarized vacuum optical trap

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10306 - Optics (including laser optics and quantum optics)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Nature Communications

ISSN

2041-1723

e-ISSN

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Volume of the periodical

9

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

8

Pages from-to

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UT code for WoS article

000454137600034

EID of the result in the Scopus database

2-s2.0-85058909640