Preparation of Light-Emitting Ytterbium-Doped Tantalum-Oxide Thin Films Using a Simple Co-Sputtering Method
Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=54123#.VO2K2yzQrzE Author(s) Kenta Miura * , Kazusa Kano , Yuki Arai , Osamu Hanaizumi Affiliation(s) Graduate School of Science and Technology, Gunma University, Kiryu, Japan . ABSTRACT Light-emitting ytterbium-doped tantalum-oxide thin films were prepared using a simple co-sputtering method for the first time. Sharp photoluminescence peaks having a wavelength of around 980 nm were observed from films annealed from 700°C to 1000°C for 10 to 40 min. The strongest intensity of the 980-nm peak was obtained from a film deposited using three ytterbium-oxide pellets and annealed at 800°C for 20 min. Such rare-earth doped tantalum-oxide sputtered films can be used as high-refractive-index materials of autocloned photonic crystals that can be applied to novel light-emitting devices, and they will also be used as both anti-reflection and down-conversion lay...