Open AccessSpin-controlled orbital motion in tightly focused high-order Laguerre-Gaussian beams
Author(s) -
Yongyin Cao,
Tongtong Zhu,
Haiyi Lv,
Weiqiang Ding
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.003377
Subject(s) - angular momentum , physics , spheres , azimuth , optics , angular momentum coupling , total angular momentum quantum number , orbital motion , spin (aerodynamics) , optical tweezers , rotation (mathematics) , azimuthal quantum number , optical vortex , optical force , orbital angular momentum of light , orbit (dynamics) , classical mechanics , geometry , mathematics , engineering , astronomy , thermodynamics , aerospace engineering
Spin angular momentum can contribute to both optical force and torque exerted on spheres. Orbit rate of spheres located in tightly focused LG beams with the same azimuthal mode index l is spin-controlled due to spin-orbit coupling. Laguerre-Gaussian beams with high-order azimuthal mode are used here to study the orbit rate of dielectric spheres. Orbit rates of spheres with varying sizes and refravtive indices are investigated as well as optical forces acting on spheres in LG beams with different azimuthal modes. These results would be much helpful to investigation on optical rotation and transfer of spin and orbital angular momentum.