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Articles you may be interested inOptical spin-to-orbital angular momentum conversion in ultra-thin metasurfaces with arbitrary topological charges A linear-to-circular polarization converter with half transmission and half reflection using a single-layered metamaterial Appl. Phys. Lett. 105, 021110 (2014); 10.1063/1.4890623 Polarization conversions of linearly and circularly polarized lights through a plasmon-induced transparent metasurface J. Appl. Phys. 115, 243503 (2014); 10.1063/1.4885769 Ultra-wideband polarization conversion metasurfaces based on multiple plasmon resonancesIn this paper, we propose to achieve wideband linear-to-circular (LTC) polarization conversion by ultra-thin bi-layered metasurfaces. As an example, an LTC polarization conversion metasurface operating in 11.4-14.3 GHz is designed and fabricated, which is composed of two layers of metallic pattern arrays separated by a 1.5 mm-thick dielectric spacer. When linearly polarized waves impinge on the bi-layered metasurface, LTC polarization conversion transmission is greater than 90% over a wide frequency range from 11.0 GHz to 18.3 GHz. Meanwhile, the axis ratio is lower than 3 dB in 9.8-18.3 GHz. This wide-band and highly efficient LTC polarization conversion transmission is analyzed theoretically. The measured LTC polarization conversion transmissions are well consistent with the simulated results. V C 2015 AIP Publishing LLC.

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