Open AccessManipulating the spin-dependent splitting by geometric Doppler effect
Author(s) -
Yachao Liu,
Yougang Ke,
Junxiao Zhou,
Hailu Luo,
Shuangchun Wen
Publication year - 2015
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.23.016682
Subject(s) - optics , physics , polarization (electrochemistry) , extrapolation , spin hall effect , doppler effect , rotation (mathematics) , dielectric , circular polarization , light beam , optical vortex , spin polarization , beam (structure) , geometry , electron , optoelectronics , chemistry , quantum mechanics , mathematical analysis , mathematics , microstrip
We report the manipulation of spin-dependent splitting by geometric Doppler effect based on dielectric metasurfaces. The extrapolation of rotational Doppler effect from temporal to spatial coordinate gives the phase change when the local optical axes of dielectric metasurfaces are rotating in space. Therefore, the continuous variation of local optical axes in a certain direction will introduce a phase gradient in the same direction at the beam cross section. This is additive to the phase gradient appeared when breaking the rotational symmetry of linearly polarized cylindrical vector beams, which leads to the deflections of different spin components of light, i.e., photonic spin Hall effect. Hence, it is possible to manipulate the spin-dependent splitting by introducing the geometric Doppler effect. Theoretically and experimentally, we show that the magnitude and orientation of the spin-dependent splitting are both tunable when changing the spatial rotation rate of local optical axes and incident polarization.