Orbital-angular-momentum transfer to optically levitated microparticles in vacuum

Michael Mazilu, Yoshihiko Arita, Tom Vettenburg, Juan M. Auñón, Ewan M. Wright, Kishan Dholakia

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

We demonstrate the transfer of orbital angular momentum to an optically levitated microparticle in vacuum. The microparticle is placed within a Laguerre-Gaussian beam and orbits the annular beam profile with increasing angular velocity as the air drag coefficient is reduced. We explore the particle dynamics as a function of the topological charge of the levitating beam. Our results reveal that there is a fundamental limit to the orbital angular momentum that may be transferred to a trapped particle, dependent upon the beam parameters and inertial forces present.

Original languageEnglish (US)
Article number053821
JournalPhysical Review A
Volume94
Issue number5
DOIs
StatePublished - 2016

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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