Crystalline phase, Ga3+ concentration profile, and optical properties of Ga3+-diffused lithium tantalate waveguide

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

2 Scopus Citations
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Author(s)

  • Shuai Ren
  • Xiao-Fei Yang
  • Zi-Bo Zhang
  • Wing-Han Wong
  • Dao-Yin Yu
  • De-Long Zhang

Detail(s)

Original languageEnglish
Pages (from-to)79-83
Journal / PublicationMaterials Letters
Volume213
Early online date31 Oct 2017
Publication statusPublished - 15 Feb 2018

Abstract

Ga3+-diffused lithium tantalate (LiTaO3) strip optical waveguide was fabricated by diffusion (at 950 °C for 1.5 h) of 8-μm wide, 112-nm thick Ga2O3-strips photolithographically patterned onto a Z-cut congruent LiTaO3 substrate. Crystalline phase, composition, optical properties and profile characteristics of Ga3+ ions in the waveguide were investigated. We show that the waveguide retains LiTaO3 crystalline phase and is in congruent composition environment. Optical studies show that the waveguide supports single-mode propagation (at the 1.5 μm wavelength) of not only the extraordinary wave but also the ordinary wave, shows considerable polarization dependence in mode field distribution, and has a loss of 0.2/0.4 dB/cm for the ordinary/extraordinary wave. Secondary ion mass spectrometry analysis shows that the Ga3+ profile follows a sum of two error functions (a Gaussian function) in the width (depth) direction of the waveguide.

Research Area(s)

  • Microstructure, Optical materials and properties, Surfaces

Citation Format(s)

Crystalline phase, Ga3+ concentration profile, and optical properties of Ga3+-diffused lithium tantalate waveguide. / Ren, Shuai; Yang, Xiao-Fei; Zhang, Zi-Bo; Wong, Wing-Han; Yu, Dao-Yin; Pun, Edwin Yue-Bun; Zhang, De-Long.

In: Materials Letters, Vol. 213, 15.02.2018, p. 79-83.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review