1. Photonic Spin-Orbit Coupling Induced by Deep-Subwavelength Structured Light
- Author
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Zhang, Xin, Liu, Guohua, Hu, Yanwen, Lin, Haolin, Zeng, Zepei, Zhang, Xiliang, Li, Zhen, Chen, Zhenqiang, and Fu, Shenhe
- Subjects
Physics - Optics - Abstract
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., Comment: 9 pages, 8 figures, and 68 conferences
- Published
- 2024