Linear polarization grating combining a circular polarization grating with a special cycloidal diffractive quarter waveplate
| Autor: | Wang Qidong, Zenghui Peng, Yuanshan Liu, Quanquan Mu, S. M. Zhang, Z Zhao, Congjuan Wang, Weixi Chen, Li Xuan, H.Z. Li, Ruxue Wei |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
Diffraction Linear polarization business.industry Beam steering Physics::Optics 02 engineering and technology Grating 021001 nanoscience & nanotechnology Polarization (waves) 01 natural sciences Waveplate Atomic and Molecular Physics and Optics 010309 optics Optics 0103 physical sciences 0210 nano-technology business Beam (structure) Circular polarization |
| Zdroj: | Optics express. 27(23) |
| ISSN: | 1094-4087 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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