Study on Infrared Antireflection Property of Polyester Membrane Modified by ³²S Ion Radiation

Broad band anti-reflection materials is one of the hotspot in the world. Nuclear track technique was proven to be an effective way to reduce the reflection of surface. Polyester membrane (PET) samples with thicknesses of 20 μm and 50 μm (denoted as 20PET and 50PET hereafter) were bombarded by ³²S ions produced by HI-13 Tandem accelerator. The latent tracks were turned into pores with diameters of 0.5 μm and 3 μm on 20PET and 50PET, respectively, while the samples were etched with sodium hydroxide and PEW solution. The surfaces of PET samples with nuclear pores were plated by the different depths of silver, graphite and magnetism fluoride by the vacuum evaporation method. The surface reflectivity was measured with the light of wavelength of 2.5-10 μm. The results indicated that the reflectivity of PET samples with pores and coated with graphite and magnetism fluoride can be reduced to 1%. PET samples with relatively deeper pores, and/or coatings on both sides, exhibit the stronger anti-reflection property.