Strong polarization-dependent photonic bandgap and giant photonic spin Hall effect in a one-dimensional photonic crystal entirely composed of all-dielectric metamaterials

In conventional one-dimensional (1-D) photonic crystals (PhCs) consisting of isotropic dielectrics, photonic bandgaps (PBGs) exhibit weak polarization-dependent property since the propagating phase of the isotropic dielectric film is polarization-independent. The weak polarization-dependent property of PBGs intensively impedes the potential application of 1-D PhCs in the photonic spin Hall effect (PSHE). Herein, we investigate the polarization-dependent property of PBGs in a class of 1-D PhCs entirely consisting of all-dielectric elliptical metamaterials (EMMs) called all-EMM 1-D PhCs. Driven by the combination of 1-D PhCs and all-dielectric EMMs, strong polarization-dependent PBGs can be realized. Then, we exploit the strong polarization-dependent PBG to achieve giant PSHE. The enhanced transverse shift of the PSHE reaches the order of 102 μm. Our work not only establishes a bridge between PhCs and all-dielectric metamaterials, but also paves a new route to manipulating polarization of light.