Light-induced rotation of dielectric microparticles around an optical nanofiber
Journal article, 2020
Evanescent electromagnetic fields near a waveguide can exert a transverse radiation force on scattering objects. To prove this experimentally, we demonstrate light-induced orbiting of isotropic, dielectric microparticles around an optical nanofiber that guides elliptically polarized, fundamental modes. The orbit frequency is proportional to the helicity of the coupled light. Interestingly, the observed motion is opposite to the energy flow circulation around the fiber. This result verifies the theoretically predicted negative optical torque on a sufficiently large particle in the vicinity of a nanofiber.
Author
Georgiy Tkachenko
Okinawa Institute of Science and Technology Graduate University
Ivan Toftul
ITMO University
Cindy Esporlas
Okinawa Institute of Science and Technology Graduate University
Aili Maimaiti
Okinawa Institute of Science and Technology Graduate University
Chalmers, Physics, Bionanophotonics
University College Cork
Fam Le Kien
Okinawa Institute of Science and Technology Graduate University
Viet Giang Truong
Okinawa Institute of Science and Technology Graduate University
Síle Nic Chormaic
Grenoble Alpes University
Okinawa Institute of Science and Technology Graduate University
Optica
2334-2536 (ISSN)
Vol. 7 1 59-62Subject Categories
Atom and Molecular Physics and Optics
Other Physics Topics
Condensed Matter Physics
DOI
10.1364/OPTICA.374441