title: Realization of tunable photonic spin Hall effect by tailoring the Pancharatnam-berry phase.
abstract: Recent developments in the field of photonic spin Hall effect (SHE) offer new opportunities for advantageous measurement of the optical parameters (refractive index, thickness, etc.) of nanostructures and enable spin-based photonics applications in the future. However, it remains a challenge to develop a tunable photonic SHE with any desired spin-dependent splitting for generation and manipulation of spin-polarized photons. Here, we demonstrate experimentally a scheme to realize the photonic SHE tunably by tailoring the space-variant Pancharatnam-Berry phase (PBP). It is shown that light beams whose polarization with a tunable spatial inhomogeneity can contribute to steering the space-variant PBP which creates a spin-dependent geometric phase gradient, thereby possibly realizing a tunable photonic SHE with any desired spin-dependent splitting. Our scheme provides a convenient method to manipulate the spin photon. The results can be extrapolated to other physical system with similar topological origins.
authors.affiliation: 1] Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060 [2] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421002, China.
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Ling
authors.affiliation: Key Laboratory for Micro-/Nano-optoelectronic Devices of Ministry of Education, College of Physics and Microelectronic Science, Hunan University, Changsha 410082, China.
authors.forename: Xinxing
authors.initials: X
authors.lastname: Zhou
authors.affiliation: Key Laboratory for Micro-/Nano-optoelectronic Devices of Ministry of Education, College of Physics and Microelectronic Science, Hunan University, Changsha 410082, China.
authors.forename: Weixing
authors.initials: W
authors.lastname: Shu
authors.affiliation: 1] Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060 [2] Key Laboratory for Micro-/Nano-optoelectronic Devices of Ministry of Education, College of Physics and Microelectronic Science, Hunan University, Changsha 410082, China.
authors.forename: Hailu
authors.initials: H
authors.lastname: Luo
authors.affiliation: 1] Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060 [2] Key Laboratory for Micro-/Nano-optoelectronic Devices of Ministry of Education, College of Physics and Microelectronic Science, Hunan University, Changsha 410082, China.
authors.forename: Shuangchun
authors.initials: S
authors.lastname: Wen