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(a) Schematic diagram of the experimental setup, (b) zoomed SEM image of the fabricated metasurface, (c) SEM images of fabricated metasurfaces of 
in Eq. (6), at the top left, corresponding GDS mask in the bottom left and zoomed GDS mask consist of the unit cell with varied orientation angles at right. (d) Broadband zoomed optical image of the metasurface structure with 
in Eq. (6).
