Negative azimuthal force of a nanofiber-guided light on a particle
Optics
2014-03-17 v1
Abstract
We calculate the force of a quasicircularly polarized guided light field of a nanofiber on a dielectric spherical particle. We show that the orbital parts of the axial and azimuthal components of the Poynting vector are always positive while the spin parts can be either positive or negative. We find that, for appropriate values of the size parameter of the particle, the azimuthal component of the force is directed oppositely to the circulation direction of the energy flow around the nanofiber. The occurrence of such a negative azimuthal force indicates that the particle undergoes a negative torque.
Keywords
Cite
@article{arxiv.1311.4054,
title = {Negative azimuthal force of a nanofiber-guided light on a particle},
author = {Fam Le Kien and Arno Rauschenbeutel},
journal= {arXiv preprint arXiv:1311.4054},
year = {2014}
}
Comments
13 pages, 10 figures