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(a) Pictures of fabricated metasurfaces (sized 504×504mm2) formed by symmetrical and l meta-atoms. (b) and (c) Measured normalized scattered-field intensities of LCP and RCP components (color map) versus frequency and detecting angle illuminated by normally incident linearly polarized beams, respectively. (d)PSHE efficiencies versus frequency obtained by analyzing the experimental data in (b, c). Here dotted lines in (b, c) are calculated by Equation 4 under normal-incidence condition. Regions surrounded by black dashed lines in (a) represent the super-cells of PB metasurface. All figures reproduced with permission from © 2015, Wiley-VCH.
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