Abstract
Photonic spin Hall effect (PSHE) with high efficiency and controllable transmission is widely pursued. In the paper, we designed a dielectric metasurface that could yield spin splitting effect with energy transfer efficiency up to 84%. Switching the output photonic spin states is realized by controlling the polarization azimuthal angle of the incident light. Introducing a background phase gradient, we also propose a high-efficiency asymmetric PSHE metasurface that could give rise to arbitrary transmission angles for the left and right circularly-polarized light. These results are numerically validated, which are of the significance in guiding the design of high-performance photonic spin manipulation devices.
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