In this study, we model and compare the performance for several different metal wire-grid polarizers over the visible
spectrum using rigorous coupled wave analysis and determine that the best choice for the wire material is aluminum.
However, a layer of Al203 forms rapidly on the aluminum wires even in high vacuum. The effect of metal oxide layers
forming on the wires is also modeled. It is shown that the actual oxide layer forming on the wires has only a small effect
on the performance of the polarizers. With the oxide layers coated on the wire, the transmission coefficient is nearly
invariable, extinction ratio slightly decreases. Next, the polarization properties are considered with changes in the
physical parameters, including period, metal height, duty cycle, and angle of incidence. The results show that aluminum
wire-grid polarizer has high transmission coefficient and extinction ratio over visible spectrum, as well as uniform
performance with wide variations in the angle of incidence. These features with their small form factor make it desirable
for use in field-of-view and allow more compact component designs.