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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2402.01080 |
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| _version_ | 1866910316136235008 |
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| author | Zhang, Xin Liu, Guohua Hu, Yanwen Lin, Haolin Zeng, Zepei Zhang, Xiliang Li, Zhen Chen, Zhenqiang Fu, Shenhe |
| author_facet | Zhang, Xin Liu, Guohua Hu, Yanwen Lin, Haolin Zeng, Zepei Zhang, Xiliang Li, Zhen Chen, Zhenqiang Fu, Shenhe |
| contents | We demonstrate both theoretically and experimentally beam-dependent photonic spin-orbit coupling in a two-wave mixing process described by an equivalent of the Pauli equation in quantum mechanics. The considered structured light in the system is comprising a superposition of two orthogonal spin-orbit-coupled states defined as spin up and spin down equivalents. The spin-orbit coupling is manifested by prominent pseudo spin precession as well as spin-transport-induced orbital angular momentum generation in a photonic crystal film of wavelength thickness. The coupling effect is significantly enhanced by using a deep-subwavelength carrier envelope, different from previous studies which depend on materials. The beam-dependent coupling effect can find intriguing applications; for instance, it is used in precisely measuring variation of light with spatial resolution up to 15 nm. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_01080 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Photonic Spin-Orbit Coupling Induced by Deep-Subwavelength Structured Light Zhang, Xin Liu, Guohua Hu, Yanwen Lin, Haolin Zeng, Zepei Zhang, Xiliang Li, Zhen Chen, Zhenqiang Fu, Shenhe Optics We demonstrate both theoretically and experimentally beam-dependent photonic spin-orbit coupling in a two-wave mixing process described by an equivalent of the Pauli equation in quantum mechanics. The considered structured light in the system is comprising a superposition of two orthogonal spin-orbit-coupled states defined as spin up and spin down equivalents. The spin-orbit coupling is manifested by prominent pseudo spin precession as well as spin-transport-induced orbital angular momentum generation in a photonic crystal film of wavelength thickness. The coupling effect is significantly enhanced by using a deep-subwavelength carrier envelope, different from previous studies which depend on materials. The beam-dependent coupling effect can find intriguing applications; for instance, it is used in precisely measuring variation of light with spatial resolution up to 15 nm. |
| title | Photonic Spin-Orbit Coupling Induced by Deep-Subwavelength Structured Light |
| topic | Optics |
| url | https://arxiv.org/abs/2402.01080 |