TABLE IV.

Overall efficiency of a metasurface for off-axis focusing and α for different aperture distributions.

ApertureOverall efficiency (%)α
H: −90° to 90° 34.2 1.8 
I: −60° to 60° 18.5 3.2 
ApertureOverall efficiency (%)α
H: −90° to 90° 34.2 1.8 
I: −60° to 60° 18.5 3.2 
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