Optical Investigations of Nanophotonic LiNbO<sub>3</sub> Films Deposited by Pulsed Laser Deposition Method
Sarah M. Taleb, Makram A. Fakhri, Salah A. Adnan
Abstract
The nanocrystalline structure of Lithium niobate (LiNbO 3 ) was prepared and deposited onto substrate made of quartz by utilize pulse laser deposition technique. The effect of substrate temperature on the structural, optical and morphological properties of lithium niobate photonic film grown was studied. The chemical mixture was prepared by mixing the raw material (Li 2 CO 3 , Nb 2 O 5 ) with Ethanol liquid without any further purification, at time of stirrer 3hrs but without heating, then annealing process the formed material at 1000C° for 4hrs. We characterized and analyzed the LiNbO 3 nanostructure thin films by utilize Ultra-Violet Visible (UV-vis). The UV-vis measurements show that, when the substrate temperature increases, the values of transmission, absorption and energy band gap will decreased, but the values of reflection and refractive index will increased. That means the LiNbO 3 thin film prepared at substrate temperatures 300C° give the best result for manufacture the optical waveguide.