An electronic spin-Hall effect induced by impurities inspires one to investigate the optical spin Hall effect in a metasurface due to defects in the geometric phase and to obtain spin-orbit interaction of light. Here, we report on optical spin Hall effect in quasicrystalline metasurface. When geometric phase defects are introduced in the aperiodic structured surface, the modes exhibit polarization helicity dependence resulting in the optical spin Hall effect. The optical spin-flip behavior of the revealed modes that arise from the geometric phase pickup was experimentally observed within the visible spectrum by measuring the spin-projected diffraction patterns. The introduced ability to manipulate the light-matter interaction of quasicrystals in a spin-dependent manner provides the route for molding light via spin-optical aperiodic artificial planar surfaces.

* I. Yulevich, E. Maguid, N. Shitrit, D. Veksler, V. Kleiner, and E. Hasman, “Optical mode control by geometric phase in quasicrystal metasurface”, in press, Phys. Rev. Lett, (2015).