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作者单位:Jingran Zhang (1) Zhongyi Guo (1) (2) Rongzhen Li (1) Wei Wang (2) (3) Anjun Zhang (1) Jianlong Liu (3) Shiliang Qu (2) Jun Gao (1)
1. School of Computer and Information, Hefei University of Technology, Hefei, 230009, China 2. Department of Optoelectronics Science, Harbin Institute of Technology at Weihai, Weihai, 264209, China 3. Department of Physics, Harbin Institute of Technology, Harbin, 150001, China
刊物类别:Chemistry and Materials Science
刊物主题:Chemistry Biotechnology Nanotechnology Biophysics and Biomedical Physics Biochemistry
出版者:Springer US
ISSN:1557-1963
文摘
We have designed a novel plasmonic lens for the circular polarization analyzer based on the combined coaxial Archimedes-spiral structure which is composed of a Archimedes-spiral slit (ASS) surrounded by coaxial Archimedes-spiral gratings (ASG) on the both sides of the metal film. The designed structure is sensitive to polarization of the incident circularly polarized light, and it can realize the focusing effect under circular polarization illumination with specific handedness and defocusing effect under the other handed circular polarization illumination. This phenomenon of spin-dependent intensity distribution can be attributed to the presence of geometric phase effect of ASS. The simulated results show that the combination of the ASS and ASG has a higher efficiency and better performance than the traditional pure ASS. Keywords Surface plasmon polaritons Circular polarization Spiral plasmonic structures