Metallized photoresist grating as a polarizing beam splitter

Absolute Diffraction Efficiencies and Extinction Ratios of Relief Structures Coated with Aluminum Films and Operating as RPBSsa

^a  The structures are as shown in the setup of (Fig. 1). for a wavelength of λ = 632.8 nm. The best theoretical results are given for a strict lamellar structure (Λ = 855 nm, a grating depth of 300 nm, and a fill factor of 54%) and for an experimental nonlamellar profile (Λ = 855 nm, a grating depth of 290 nm, and a fill factor of 25%). Values for the samples represent experimental measurements of gratings that were holographically recorded with geometrical parameters close to those of the best nonlamellar theoretical profile.