Composition, surface morphology, optical properties and Ti profile characteristics of Ti-diffused LiTaO3 strip waveguide

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

2 Scopus Citations
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Author(s)

  • Xiao-Fei Yang
  • Zi-Bo Zhang
  • Hong-Xue Sun
  • Wan-Ying Du
  • Qun Zhang
  • Wing-Han Wong
  • Dao-Yin Yu
  • De-Long Zhang

Detail(s)

Original languageEnglish
Pages (from-to)2519-2524
Journal / PublicationJournal of Alloys and Compounds
Volume695
Publication statusPublished - 25 Feb 2017

Abstract

Ti-diffused LiTaO3 strip waveguide was fabricated by in-diffusion of 8-μm-wide, 100-nm-thick Ti-strip at 1300 °C for 6 h in wet O2 atmosphere. Its composition, surface morphology, lattice parameter, optical properties and Ti profile characteristics were fully characterized. It is shown that the waveguide is in the congruent composition environment. The waveguide surface caves in ∼70 nm below the crystal surface due to Ti-induced lattice contraction, which is verified by X-ray single-crystal diffraction. Optical characterizations show that the waveguide well supports both TE and TM single-mode propagation at the 1.5 μm wavelength, is polarization-insensitive, and has a loss of 0.4 (0.3) dB/cm for the TM (TE) mode. Secondary ion mass spectrometry analysis shows that the Ti profile follows a sum of two error functions in the width direction and a Gaussian function in the depth direction of the waveguide.

Research Area(s)

  • Crystal growth, Diffusion, Optical materials, Optical properties, Optical spectroscopy, X-ray diffraction

Citation Format(s)

Composition, surface morphology, optical properties and Ti profile characteristics of Ti-diffused LiTaO3 strip waveguide. / Yang, Xiao-Fei; Zhang, Zi-Bo; Sun, Hong-Xue; Du, Wan-Ying; Zhang, Qun; Wong, Wing-Han; Yu, Dao-Yin; Pun, Edwin Yue-Bun; Zhang, De-Long.

In: Journal of Alloys and Compounds, Vol. 695, 25.02.2017, p. 2519-2524.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal