lda0 1.55[um] "Design wavelength"
px 500[nm] "Unit cell spacing in x"
py 500[nm] "Unit cell spacing in y"
tSub extraSpace/nSiO2 "Thickness of substrate"
tPost 1[um] "Thickness of posts"
tAir tPost+extraSpace "Thickness of air"
extraSpace lda0/2 "Ensure there is sufficient space above/below the posts"
nSiO2 1.444 "Index of the substrate at the design wavelength"
N 6 "Number of unit cells"
d N*px "Structure size in x"
x1 "(0 + 1/2)*px" "Location of post 1"
x2 "(1 + 1/2)*px" "Location of post 2"
x3 "(2 + 1/2)*px" "Location of post 3"
x4 "(3 + 1/2)*px" "Location of post 4"
x5 "(4 + 1/2)*px" "Location of post 5"
x6 "(5 + 1/2)*px" "Location of post 6"
r1 90[nm] "Radius of post 1"
r2 130[nm] "Radius of post 2"
r3 150[nm] "Radius of post 3"
r4 165[nm] "Radius of post 4"
r5 180[nm] "Radius of post 5"
r6 195[nm] "Radius of post 6"
theta asin(lda0/d)/1[deg] "Deflection angle"