期刊
OPTICS LETTERS
卷 46, 期 10, 页码 2537-2540出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.424277
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资金
- National Natural Science Foundation of China [11904169]
- Natural Science Foundation of Jiangsu Province [BK20190383]
- China Postdoctoral Science Foundation [2020M681576]
- Postdoctoral Science Foundation of Jiangsu Province [2020Z224]
In this study, a significant enhancement of the photonic spin Hall effect (SHE) was achieved in a plasmonic metasurface with S-4 symmetry. A new method for designing spin-based nanophotonic devices was discovered.
In this Letter, we report the significant enhancement of the photonic spin Hall effect (SHE) in a plasmonic metasurface with S-4 symmetry. We find that an enhanced SHE of reflected light can occur in both horizontally and vertically polarized incident beams, and the maximum transverse displacement can approach half of the beam waist. Such a large displacement is caused by the non-resonant and nearzero pseudo-Brewster angles in the plasmonic metasurface. Owing to S-4 symmetry, a unidirectional SHE is obtained in the metasurface, i.e., large and tiny transverse displacements are realized for a linearly polarized beam incident from the opposite side. This Letter provides a new, to the best of our knowledge, way to achieve an enhanced photonic SHE and offers more opportunities for designing spin-based nanophotonic devices. (C) 2021 Optical Society of America
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