期刊
APPLIED PHYSICS LETTERS
卷 111, 期 24, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5006540
关键词
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资金
- National Key Research and Development Program of China [2016YFA0200400, 2016YFA0200800]
- National Natural Science Foundation of China [91323304, 11674387, 11504414, 11574369, 11574385, 11574368, 61390503]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB07020200]
We demonstrate theoretically and experimentally a plasmonic metasurface operating as a broadband polarization converter with adequate efficiency which can transform linearly polarized light into its orthogonal polarization in the near-infrared region. The unit cell of the specifically designed metasurfaces is composed of an asymmetric split-ring resonator (SRR) within a square metallic hole. The adequate polarization conversion rate arises from the enhancement of the cross-polarized electric field and the decrease in the co-polarized electric field induced by the symmetry breaking of the SRR. Furthermore, a broad operating frequency range results from the overlap of multiple polarization rotation responses, which are generated in the combined symmetry-breaking SRRs and square metallic holes. This ultrathin single-layer metasurface avoids the complicated fabrication process of multilayered and tridimensional polarization converters and offers more intriguing possibilities to design high-performance plasmonic metasurfaces for polarization modulation. Published by AIP Publishing.
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