Open AccessTunable spin Hall shift of light from graphene-wrapped spheres
Author(s) -
Q Zhang,
Dongliang Gao,
Lei Gao
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.420630
Subject(s) - graphene , spin hall effect , condensed matter physics , electric field , spin polarization , magnetic field , hall effect , spin (aerodynamics) , terahertz radiation , dipole , physics , optics , materials science , optoelectronics , nanotechnology , electron , quantum mechanics , thermodynamics
Graphene has taken impressive roles in light manipulation and optical engineering. The most attractive advantage of graphene is its tunable conductivity that could be dynamically modulated by various means. In this paper, we show that the spin Hall shift of light is dynamically tunable via changing the Fermi level of the graphene-wrapped spheres. Such tunability is prominent when different modes interfere with each other, such as at the interference of electric and magnetic dipolar modes or at the interference of electric dipolar and electric quadrupole modes. The circular polarization degree in the near field clearly demonstrates the strength of spin-orbit interaction, which is associated with spin Hall shift of light in the far-field. In addition, the spin Hall effect is shown in far-field detection plane and should be observed in experiment. Our results provide insights into how the spin Hall effect could be tuned and add new perspective in designing optical super-resolution imaging techniques.