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Proceedings Paper

Deposition of potassium lithium niobate films by sol-gel method
Author(s): 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
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Paper 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.

Paper Details

Date Published: 12 November 1999
PDF: 8 pages
Proc. SPIE 3896, Design, Fabrication, and Characterization of Photonic Devices, (12 November 1999); doi: 10.1117/12.370342
Show Author Affiliations
Hong Xi Zhang, Nanyang Technological Univ. (Singapore)
Yan Zhou, Nanyang Technological Univ. (Singapore)
Chan Hin Kam, Nanyang Technological Univ. (Singapore)
X. Q. Han, Nanyang Technological Univ. (Singapore)
Shi De Cheng, Nanyang Technological Univ. (Singapore)
Boon Siew Ooi, Nanyang Technological Univ. (Singapore)
Yee Loy Lam, Nanyang Technological Univ. (Singapore)
Yuen Chuen Chan, Nanyang Technological Univ. (Singapore)
Zhuo Sun, Nanyang Technological Univ. (Singapore)
M. B. Yu, Nanyang Technological Univ. (Singapore)
Xu Shi, Nanyang Technological Univ. (Singapore)
Soon Fatt Yoon, Nanyang Technological Univ. (Singapore)


Published in SPIE Proceedings Vol. 3896:
Design, Fabrication, and Characterization of Photonic Devices

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