1. Infrared dielectric functions and phonon modes of high-quality ZnO films
- Author
-
Ashkenov, N., Mbenkum, B.N., Bundesmann, C., Riede, V., Lorenz, M., Spemann, D., Kaidashev, E.M., Kasic, A., Schubert, M., Grundmann, M., Wagner, G., Neumann, H., Darakchieva, Vanya, Arwin, Hans, Monemar, Bo, Ashkenov, N., Mbenkum, B.N., Bundesmann, C., Riede, V., Lorenz, M., Spemann, D., Kaidashev, E.M., Kasic, A., Schubert, M., Grundmann, M., Wagner, G., Neumann, H., Darakchieva, Vanya, Arwin, Hans, and Monemar, Bo
- Abstract
A study was performed on the phonon modes and infrared dielectric functions of high-quality ZnO thin films. The pulsed laser deposition technique was used to deposit the ZnO films on c-plane sapphire substrates and were investigated by high-resolution transmission electron microscopy, high-resolution x-ray diffraction and Rutherford backscattering experiments. The accurate long-wavelength dielectric constant limits of the films were also obtained and were compared with near-band-gap index-of-refraction data upon the Lyddane-Sachs-Teller relation for both film and bulk samples. It was found that the phonon modes of the film were highly consistent with those of the bulk sample.
- Published
- 2003
- Full Text
- View/download PDF