29 January 2007 Large electro-optic effect in sol-gel-processed poled TiO2/SiO2 films doped with organic azo dye
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Proceedings Volume 6279, 27th International Congress on High-Speed Photography and Photonics; 62797F (2007) https://doi.org/10.1117/12.725953
Event: 27th International congress on High-Speed Photography and Photonics, 2006, Xi'an, China
Abstract
Highly transparent TiO2/SiO2 films prepared using sol-gel technique doped with organic azo dye, Disperse Red 1(DR1) have been investigated. Processing parameters such as spin speed, spin time, and ambient atmosphere, and solution synthesis parameters such as catalysis method, alcohol dilution ratio, and component molar percentages, may affect the film formation. The refractive index increases follow along with the raising of the molar ratio between TiO2 and SiO2. When the molar ratio between TiO2 and SiO2 is zero, i.e. no titania precursor in the initial solution, the refractive index is minimum 1.49 at 1300nm, whereas when there is no TEOS in the initial solution, the refractive index is maximum 1.81 at 1300nm. The sol-gel thin film is spin-coated on ITO glass substrate with better uniformity. The electric-optic coefficient γ33=42pm/V was measured by simple reflection technique at a fundamental wavelength of 1300nm. The hybrid organic-inorganic sol-gel film is well balanced material in its simplicity for film formation, nonlinearity, and thermal stability sufficient for device fabrication. Moreover, the measurement system was calibrated and the measured electric-optic coefficient of the gallium arsenide crystal is in excellent agreement with the known value.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alin Hou, Alin Hou, Hongfei Liu, Hongfei Liu, Shaolin Liu, Shaolin Liu, Weinan Gao, Weinan Gao, Jie Sun, Jie Sun, Daming Zhang, Daming Zhang, Maobin Yi, Maobin Yi, } "Large electro-optic effect in sol-gel-processed poled TiO2/SiO2 films doped with organic azo dye", Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 62797F (29 January 2007); doi: 10.1117/12.725953; https://doi.org/10.1117/12.725953
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