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15 November 2017 Generation of vector beams with polarization rotation metasurfaces
Xiaobin Hu, Tong Li, Jian Li, Xin Wei
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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, and Xin Wei "Generation of vector beams with polarization rotation metasurfaces", Proc. SPIE 10605, LIDAR Imaging Detection and Target Recognition 2017, 1060538 (15 November 2017); https://doi.org/10.1117/12.2295486
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KEYWORDS
Polarization
Antennas
Reflectivity
Metamaterials
Optical activity
Optical properties
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