A polarization dependent device suitable for effecting at least one
polarization of a broadband portion of electromagnetic radiation incident
upon the device is disclosed. This 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.