15 November 2017 Generation of vector beams with polarization rotation metasurfaces
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Proceedings Volume 10605, LIDAR Imaging Detection and Target Recognition 2017; 1060538 (2017) https://doi.org/10.1117/12.2295486
Event: LIDAR Imaging Detection and Target Recognition 2017, 2017, Changchun, China
Abstract
We theoretically demonstrate high efficiency broadband vector beams generation with polarization rotation metasurfaces composed of L-shaped silver antenna array, silica spacer, and silver ground plane. 0° to 90° arbitrary optical rotation with high degree of linear polarization (DoLP) over a broadband can be achieved readily by adjusting arm length of the L-shaped antenna. And through turning the L-shaped antennas upside down, the 0° to 90° optical rotation can be turned into 0° to -90°. Reflected phase can be shift by π after a 90° rotation of the L-shaped or Γ-shaped antennas, while optical rotation angle remains the same. Then six discrete units are designed to realize 0° to 360° polarization rotation with a step of 60°. With the combination of these units, we proposed metamaterial structures for highly efficient generation of radially polarized and azimuthally polarized vector beams.
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Xiaobin Hu, Tong Li, Jian Li, Xin Wei, "Generation of vector beams with polarization rotation metasurfaces", Proc. SPIE 10605, LIDAR Imaging Detection and Target Recognition 2017, 1060538 (15 November 2017); doi: 10.1117/12.2295486; https://doi.org/10.1117/12.2295486
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