Large electro-optic effect in sol-gel-processed poled Ti02/Si02 films doped with organic azo dye

Alin Hou; Hongfei Liu; Shaolin Liu; Weinan Gao; Jie Sun; Daming Zhang; Maobin Yi

doi:10.1117/12.725953

29 January 2007 Large electro-optic effect in sol-gel-processed poled TiO₂/SiO₂ films doped with organic azo dye

Alin Hou, Hongfei Liu, Shaolin Liu, Weinan Gao, Jie Sun, Daming Zhang, Maobin Yi

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.

Citation Download Citation

Alin Hou, Hongfei Liu, Shaolin Liu, Weinan Gao, Jie Sun, Daming Zhang, and 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); https://doi.org/10.1117/12.725953

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