Photonic Spin Hall Effect at Metasurfaces

• Autores: Xiaobo Yin, Ziliang Ye, Junsuk Rho, Yuan Wang, Xiang Zhang
• Localización: Science, ISSN 0036-8075, Vol. 339, Nº 6126, 2013, págs. 1406-1407
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • The spin Hall effect (SHE) of light is very weak because of the extremely small photon momentum and spin-orbit interaction. Here, we report a strong photonic SHE resulting in a measured large splitting of polarized light at metasurfaces. The rapidly varying phase discontinuities along a metasurface, breaking the axial symmetry of the system, enable the direct observation of large transverse motion of circularly polarized light, even at normal incidence. The strong spin-orbit interaction deviates the polarized light from the trajectory prescribed by the ordinary Fermat principle. Such a strong and broadband photonic SHE may provide a route for exploiting the spin and orbit angular momentum of light for information processing and communication.