Deposition of potassium lithium niobate films by sol-gel method

Hong Xi Zhang; Yan Zhou; Chan Hin Kam; X. Q. Han; Shi De Cheng; Boon Siew Ooi; Yee Loy Lam; Yuen Chuen Chan; Zhuo Sun; M. B. Yu; Xu Shi; Soon Fatt Yoon

doi:10.1117/12.370342

12 November 1999 Deposition of potassium lithium niobate films by sol-gel method

Hong Xi Zhang, Yan Zhou, Chan Hin Kam, X. Q. Han, Shi De Cheng, Boon Siew Ooi, Yee Loy Lam, Yuen Chuen Chan, Zhuo Sun, M. B. Yu, Xu Shi, Soon Fatt Yoon

Author Affiliations +

Proceedings Volume 3896, Design, Fabrication, and Characterization of Photonic Devices; (1999) https://doi.org/10.1117/12.370342
Event: International Symposium on Photonics and Applications, 1999, Singapore, Singapore

Abstract

Potassium lithium niobate (KLN) films have been prepared by sol-gel method using metal ethoxides as starting materials. The films were deposited by spin coating and were annealed in air in a conventional oven as well as in a rapid thermal processor (RTP). X-ray diffraction and Raman scattering measurements have shown that polycrystalline KLN films with tetragonal tungsten-bronze-type structure could be obtained on both SiO₂ buffered Si and fused quartz substrates. Surface morphology studies indicated that RTP annealing could avoid film cracking and enable nanostructured low- surface roughness KLN films to be formed. Optical waveguiding experiments showed that the films have refractive indices close to those of their single crystal and could support several modes. The films deposited on fused quartz were highly transparent in the visible-near IR spectral range and the absorption edges of the films, as determined from the absorption data, were found to shift towards the violet spectral side.

Citation Download Citation

Hong Xi Zhang, Yan Zhou, Chan Hin Kam, X. Q. Han, Shi De Cheng, Boon Siew Ooi, Yee Loy Lam, Yuen Chuen Chan, Zhuo Sun, M. B. Yu, Xu Shi, and Soon Fatt Yoon "Deposition of potassium lithium niobate films by sol-gel method", Proc. SPIE 3896, Design, Fabrication, and Characterization of Photonic Devices, (12 November 1999); https://doi.org/10.1117/12.370342

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