Open AccessLinear polarization grating combining a circular polarization grating with a special cycloidal diffractive quarter waveplate
Author(s) -
Wei Chen,
Zhao Zhang,
C Wang,
H Li,
RuDong Wei,
S Zhang,
Zenghui Peng,
Y Liu,
Qi Wang,
Quanquan Mu,
Xuan Li
Publication year - 2019
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.27.033378
Subject(s) - optics , waveplate , grating , polarization (electrochemistry) , linear polarization , circular polarization , physics , diffraction grating , elliptical polarization , materials science , laser , chemistry , microstrip
We introduce and demonstrate a switchable novel linear polarization grating (LPG) consisting of a circular polarization grating (CPG) and a special cycloidal diffractive quarter waveplate (CQWP). The CQWP is developed that marvelously matches the polarization-state of beams passing through the CPG. Such an LPG is so polarization-sensitive that it can split an incident linear polarized beam into two proportionally controllable left- or right-handed circularly polarized lights. We establish rigorous simulation model based on finite element method to investigate near-field polarization-state distribution of CPGs. Furthermore, LPGs are demonstrated and the diffraction properties are obtained with simulation and Jones Matrix analysis. The combination of CPGs and CQWPs is achieved with polymerizable liquid crystal. The experimental results of deflection angle and polarization selectivity of LPGs are consistent with those of simulation.