J. Phys. IV France 08 (1998) Pr9-277-Pr9-280
PbTiO3 epitaxial thin films as optical waveguidesE. Dogheche, B. Jaber, X. Lansiaux and D. Rèmiens
Laboratoire des Matériaux Avancés Céramiques (LAMAC), Université de Valenciennes et du Hainaut-Cambrésis, 59600 Maubeuge, France
Thin films of lead titanate (PbTiO3-PT) have been prepared in-situ on SrTiO3 (100) substrates using radio-frequency sputtering. The epitaxial quality of the films has been investigated as a function of the substrate temperature. Stoichiometric films have been obtained in the temperature range 550°C-600°C. Films have a high degree of c-axis oriented crystalline structure. The optimum conditions for growing epitaxial PbTiO3 layers are reported in this study. Thin films grown at 550°C exhibited a rocking curve full width at a half maximum (FWHM) of 0.26°. The refractive index calculated from optical transmission method has been evaluated to 2.61 @ 632.8nm, which represents 98% of the corresponding bulk material.
© EDP Sciences 1998