Multilayer Thin-film Polarizers with Reduced Electric-field Intensity

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Abstract
A methodology for designing pairs of layers to reduce the peak electric-field intensity in the critical layers of multilayer polarizers and oblique incidence reflectors is presented. It is shown that, for S-polarized radiation, the peak field intensity in the first high-index layer of a polarizer having (H/2 L H/2) as the basic stack, can be reduced by about a factor of seven by adding a single pair of layers on the side of incidence. Further, about a factor of four reduction in peak field intensity for S-polarized radiation occurs in the first high-index layer of a (HL)7H polarizer and oblique-incidence reflectors with the addition of three pairs of layers having different thicknesses. This methodology can also be applied for designing pairs of layers for reducing peak electric-field intensity for P-polarized radiation.