Geometric phase for multidimensional manipulation of photonics spin Hall effect and helicity-dependent imaging
Zang XiaoFei,
Yao BingShuang,
Li Zhen,
Zhu Yang,
Xie JingYa,
Chen Lin,
Balakin Alexey. V.,
Shkurinov Alexander. P.,
Zhu YiMing,
Zhuang SongLin
Affiliations
Zang XiaoFei
Terahertz Technology Innovation Research Institute, Terahertz Spectrum and Imaging Technology Cooperative Innovation Center, Shanghai Key Lab of Modern Optical System, University of shanghai for Science and Technology, Shanghai, 200093, China
Yao BingShuang
Terahertz Technology Innovation Research Institute, Terahertz Spectrum and Imaging Technology Cooperative Innovation Center, Shanghai Key Lab of Modern Optical System, University of shanghai for Science and Technology, Shanghai, 200093, China
Li Zhen
Terahertz Technology Innovation Research Institute, Terahertz Spectrum and Imaging Technology Cooperative Innovation Center, Shanghai Key Lab of Modern Optical System, University of shanghai for Science and Technology, Shanghai, 200093, China
Zhu Yang
Terahertz Technology Innovation Research Institute, Terahertz Spectrum and Imaging Technology Cooperative Innovation Center, Shanghai Key Lab of Modern Optical System, University of shanghai for Science and Technology, Shanghai, 200093, China
Xie JingYa
Terahertz Technology Innovation Research Institute, Terahertz Spectrum and Imaging Technology Cooperative Innovation Center, Shanghai Key Lab of Modern Optical System, University of shanghai for Science and Technology, Shanghai, 200093, China
Chen Lin
Terahertz Technology Innovation Research Institute, Terahertz Spectrum and Imaging Technology Cooperative Innovation Center, Shanghai Key Lab of Modern Optical System, University of shanghai for Science and Technology, Shanghai, 200093, China
Balakin Alexey. V.
Department of Physics and International laser Center, Lomonosov Moscow State University, Leninskie Gory 1, Moscow, 19991, Russia
Shkurinov Alexander. P.
Department of Physics and International laser Center, Lomonosov Moscow State University, Leninskie Gory 1, Moscow, 19991, Russia
Zhu YiMing
Terahertz Technology Innovation Research Institute, Terahertz Spectrum and Imaging Technology Cooperative Innovation Center, Shanghai Key Lab of Modern Optical System, University of shanghai for Science and Technology, Shanghai, 200093, China
Zhuang SongLin
Terahertz Technology Innovation Research Institute, Terahertz Spectrum and Imaging Technology Cooperative Innovation Center, Shanghai Key Lab of Modern Optical System, University of shanghai for Science and Technology, Shanghai, 200093, China
The spin Hall effect of light, associated with spin-orbit interactions, describes a transport phenomenon with optical spin-dependent splitting, leading to a plethora of applications such as sensing, imaging, and spin-controlled nanophotonics. Although geometric meatsurfaces can mimic photonic spin Hall effect by spatially splitting left-hand circularly polarized and right-hand circularly polarized states of electromagnetic waves with anomalous refraction or reflection angles, the geometric phase generated by metasurfaces hinders metalenses to realize simultaneous focusing of different spin states, limiting further applications. Here, we propose and experimentally demonstrate an approach to realizing a spin Hall metalens that can focus terahertz waves with different spin states and flexibly manipulate spin-dependent focal points in multiple spatial dimensions based on a pure geometric phase. A dielectric metasurface consisting of micropillars with identical shape and different in-plane orientations is designed to realize the multidimensional manipulation of photonics spin Hall effect in terahertz region. Furthermore, helicity-dependent imaging is demonstrated by the terahertz spin Hall metalens. The uniqueness and robust approach for manipulating spin photons may have a significant impact on designing ultra-compact and multifunctional devices and spin photonics devices.
