Orbital motion from optical spin: the extraordinary momentum of circularly polarized light beams

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F18%3A00494376" target="_blank" >RIV/68081731:_____/18:00494376 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Orbital motion from optical spin: the extraordinary momentum of circularly polarized light beams
Original language description
We provide a vivid demonstration of the mechanical effect of transverse spin momentum in annoptical beam in free space. This component of the Poynting momentum was previously thoughtnto be virtual, and unmeasurable. Here, its effect is revealed in the inertial motion of a probenparticle in a circularly polarized Gaussian trap, in vacuum. Transverse spin forces combine withnthermal fluctuations to induce a striking range of non-equilibrium phenomena. With increasingnbeam power we observe (i) growing departures from energy equipartition, (ii) the formation ofncoherent, thermally excited orbits and, ultimately, (iii) the ejection of the particle from the trap.nOur results complement and corroborate recent measurements of spin momentum in evanescentnwaves, and extend them to a new geometry, in free space. In doing so, we exhibit fundamental,ngeneric features of the mechanical interaction of circularly polarized light with matter. The worknalso shows how observations of the under-damped motion of probe particles can provide detailedninformation about the nature and morphology of momentum flows in arbitrarily structured lightnfields as well as providing a test bed for elementary non-equilibrium statistical mechanics.
Czech name
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Czech description
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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

Article name in the collection
Recent Trends in Charged Particle Optics and Surface Physics Instrumentation. Proceedings of the 16th International Seminar
ISBN
978-80-87441-23-7
ISSN
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e-ISSN
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Number of pages
2
Pages from-to
78-79
Publisher name
Institute of Scientific Instruments The Czech Academy of Sciences
Place of publication
Brno
Event location
Skalský dvůr
Event date
Jun 4, 2018
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000450591400030

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