Structural and optical characterization of oriented LiTaO3 thin films deposited by sol-gel technique S. Youssef, R. Al Asmar, J. Podlecki, B. Sorli and A. Foucaran Eur. Phys. J. Appl. Phys., 43 1 (2008) 65-71 Published online: 24 June 2008 DOI: 10.1051/epjap:2008122