Photonic spin hall effect (PSHE), that spin-polarized photons can be laterally separated in transportation, gains increasing attention from both science and technology, but available mechanisms either require bulky systems or exhibit very low efficiencies. Here we demonstrate that a giant PSHE with ~100% efficiency can be realized at certain meta-surfaces with deep-subwavelength thicknesses. Based on rigorous Jones-Matrix analysis, we establish a general criterion to design meta-surfaces that can realize 100%-efficiency PSHE. The criterion is approachable from two distinct routes at general frequencies. As a demonstration, two microwave meta-surfaces are fabricated and then experimentally characterized, both showing ~90% efficiencies for the PSHE. Our findings pave the road for many exciting applications based on high-efficiency manipulations of photon spins, with a polarization detector experimentally demonstrated here as an example.
Shulin Sun, "Photonic spin Hall effect with nearly 100% efficiency
(Conference Presentation)," Proc. SPIE 9918, Metamaterials, Metadevices, and Metasystems 2016, 991819 (Presented at SPIE Nanoscience + Engineering: August 30, 2016; Published: 9 November 2016); https://doi.org/10.1117/12.2237256.5159519590001.
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