Polarization Characteristics Variation of Visible Light on Reflection from ZnO Based Amorphous Films

摘要

The change in polarization characteristics of visible light reflected from amorphous ZnO and Ca doped ZnO thin films were studied. Highly transparent thin films of ZnO and Ca doped ZnO were deposited on glass substrate by sol-gel spin coating technique. Reflection studies revealed that the change in the polarization state and azimuth of the electric vector introduced by sample films are quite different as compared to those for reflected beam from uncoated substrate. The rotation of electric vector in reflected light was found to depend considerably on variation in angle of incidence as well as Ca concentration in ZnO. Films, interestingly, changed the incident plane polarized light to elliptically polarized on reflection.