Orbital-angular-momentum transfer to optically levitated microparticles in vacuum
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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.
Mazilu , M , Arita , Y , Vettenburg , T , Aunon-Garcia , J M , Wright , E M & Dholakia , K 2016 , ' Orbital-angular-momentum transfer to optically levitated microparticles in vacuum ' , Physical Review. A, Atomic, molecular, and optical physics , vol. 94 , no. 5 , 053821 . https://doi.org/10.1103/PhysRevA.94.053821
Physical Review. A, Atomic, molecular, and optical physics
Copyright © 2016, American Physical Society. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at journals.aps.org / https://doi.org/10.1103/PhysRevA.94.053821
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