Open AccessTunable optical spatial differentiation in the photonic spin Hall effect
Author(s) -
Chunqiao Mi,
Wanye Song,
Xiang Chen,
Chenhao Yang,
Yujun Song,
Xueling Mi
Publication year - 2020
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.406202
Subject(s) - differentiator , photonics , optics , physics , spin hall effect , polarization (electrochemistry) , brewster's angle , optoelectronics , brewster , spin polarization , bandwidth (computing) , telecommunications , computer science , electron , quantum mechanics , chemistry
Optical differential operation and image edge detection have shown some unique advantages, including faster operating speeds and lower power consumption, compared to a digital image processor. Here, we examine the origin of optical differentiator in the photonic spin Hall effect. We find that the optical differentiator in x direction is related to the beam divergence when the incident angle of the central wave vector meets Brewster's, while the optical differentiator in y direction is related to the cross polarization component. By eliminating the H-H or V-V polarization component, the H-V or V-H polarization component induced the spin-dependent splitting in the photonic spin Hall effect, which can be used for the one-dimensional optical differentiator in an arbitrary direction. Furthermore, we investigate the photonic spin Hall effect and double-peak profile near Brewster angle and predict that a perfect two-dimensional optical differentiator will become a reality.