Optical polarization property of porous anodic alumina template

In order to study the optical polarization property of porous anodic alumina template,the homogeneous and ordered porous anodic alumina(PAA) temple was prepared by twice-anodic oxidation in H2SO4 solution.The morphological,structural and optical polarization property of the obtained PAA was characterized and analyzed.It is revealed the the PAA is anodized at low room temperature with a large current density.The aluminum is only partially oxidized and there is residual aluminum located between pores which formed nanoarray.The result of X-ray diffractogram shows that the PAA is anodic alumina amorphous state,and the transmission and polarization spectrum have indicated that PAA has better transmittance and some extinction ratio in the visible region and the near infrared region.The obtained results is favor of fabricating micropolarizers with anodic alumina film with implanted nanohole metallic arrays.