A polarization dependent device suitable for effecting at least one
polarization of a broadband portion of electromagnetic radiation incident
upon the device includes a substrate, and a plurality of regions of
differing refractive indices positioned in an alternating manner and
substantially adjacent to the substrate to effect the at least one
polarization impinging on the regions. The plurality of regions are
oriented with respect to the at least one polarization of the broadband
portion of the electromagnetic radiation so as to effect the at least one
polarization of the broadband portion of the electromagnetic radiation
impinging on the regions.