Deposition of potassium lithium niobate films by sol-gel method

H. X. Zhang*, Y. Zhou, C. H. Kam, X. Q. Han, S. D. Cheng, B. S. Ooi, Y. L. Lam, Y. C. Chan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

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 their single crystal and could support several modes. The films deposited on fused quartz were highly transparent in the visible-near infrared spectral range and the absorption edges of the films, as determined from the absorption data, were found to shift towards the violet spectral side.

Original languageEnglish (US)
Pages (from-to)425-432
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3896
StatePublished - 1999
Externally publishedYes

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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