title: Observation of photonic spin Hall effect with phase singularity at dielectric metasurfaces.
abstract: Observation of photonic spin Hall effect (SHE) near the phase singularity at dielectric metasurfaces is presented. The structured metasurface works as a space-variant Pancharatnam-Berry phase element and produces a vortex beam with phase singularity. The dynamical vortex phase is introduced to eliminate or enhance the phase singularity, thus realizing the manipulation of spin-dependent Pancharatnam-Berry phase. The spin-orbit coupling near the singularity of the Pancharatnam-Berry phase leads to the observation of the photonic SHE which manifests itself as spin-dependent splitting. The underlying mechanism is significantly different from previously reported cases. It thereby provides an alternative way to manipulate the spin states of photons.
authors.forename: Ying
authors.initials: Y
authors.lastname: Li
authors.forename: Yachao
authors.initials: Y
authors.lastname: Liu
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Ling
authors.forename: Xunong
authors.initials: X
authors.lastname: Yi
authors.forename: Xinxing
authors.initials: X
authors.lastname: Zhou
authors.forename: Yougang
authors.initials: Y
authors.lastname: Ke
authors.forename: Hailu
authors.initials: H
authors.lastname: Luo
authors.forename: Shuangchun
authors.initials: S
authors.lastname: Wen
authors.forename: Dianyuan
authors.initials: D
authors.lastname: Fan