d 5[um] "Hole diameter"
Delta 6.75[um] "Hole separation"
rb 10[um] "Radius for calculation domain"
nbg 1.45 "Background refractive index"
nair 1 "Air refractive index"
wl 1.45[um] Wavelength
neffMax 1.4454 "Maximum expected effective index,"
neffMin 1.429 "Minimum expected effective index,"
wlr wl/sqrt(nbg^2-neffMax^2) "Wavelength in the radial direction"