Enhanced and unidirectional photonic spin Hall effect in a plasmonic metasurface with S-4 symmetry

Liu Jiaqing; Li Xiao; Tao Jiaqi; Dong Daxing; Liu Youwen; Fu Yangyang

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Enhanced and unidirectional photonic spin Hall effect in a plasmonic metasurface with S-4 symmetry

机译：具有S-4对称性的等离子体元表面的增强和单向光子旋转霍尔效应

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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

机译：在这封信中，我们报道了在具有S-4对称性的等离子体超表面中光子自旋霍尔效应（SHE）的显著增强。我们发现，在水平和垂直偏振的入射光束中，反射光的SHE都会增强，最大横向位移可以接近束腰的一半。如此大的位移是由等离子体超表面中的非共振和接近零的伪布鲁斯特角引起的。由于S-4对称性，在亚表面中获得了单向SHE，即线偏振光束从对面入射时实现了大的和小的横向位移。据我们所知，这封信提供了一种实现增强光子SHE的新方法，并为设计基于自旋的纳米光子器件提供了更多机会。（2021）美国光学学会

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《Optics Letters》 |2021年第10期|共4页
作者
Liu Jiaqing; Li Xiao; Tao Jiaqi; Dong Daxing; Liu Youwen; Fu Yangyang;
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作者单位

Nanjing Univ Aeronaut &

Astronaut Coll Sci Nanjing 211106 Peoples R China;

Nanjing Univ Aeronaut &

Astronaut Coll Sci Nanjing 211106 Peoples R China;

Nanjing Univ Aeronaut &

Astronaut Coll Sci Nanjing 211106 Peoples R China;

Nanjing Univ Aeronaut &

Astronaut Coll Sci Nanjing 211106 Peoples R China;

Nanjing Univ Aeronaut &

Astronaut Coll Sci Nanjing 211106 Peoples R China;

Nanjing Univ Aeronaut &

Astronaut Coll Sci Nanjing 211106 Peoples R China;

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正文语种 eng
中图分类计量学;光学;
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Enhanced and unidirectional photonic spin Hall effect in a plasmonic metasurface with S-4 symmetry

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