Abstract
We deduce from Monomode Modal Method the analytical expressions of
transmission and reflexion Jones matrices of an infinitely conducting metallic
screen periodically pierced by subwavelength holes. The study is restricted to
normal incidence and to the case of neglected evanescent fields (far-field)
which covers many common cases. When only one non-degenerate mode propagates in
cavities, they take identical forms to those of a polarizer, with
Fabry-Perot-like spectral resonant factors depending on bigrating parameters.
The isotropic or birefringent properties are then obtained when holes support
two orthogonal polarization modes. This basic formalism is finally applied to
design compact and efficient metallic half-wave plates.
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