Shallow Ti : LiNbO 3 strip waveguide

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

8 Scopus Citations
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Author(s)

  • Ping-Rang Hua
  • Bei Chen
  • Quan-Zhou Zhao
  • Fang Han
  • Dao-Yin Yu
  • De-Long Zhang

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number6178755
Pages (from-to)520-527
Journal / PublicationIEEE Photonics Journal
Volume4
Issue number2
Publication statusPublished - 2012

Abstract

We report shallow single-mode Ti:LiNbO 3 strip waveguides fabricated on Z-cut congruent LiNbO 3 substrate by a two-step Ti-diffusion process, starting with the diffusion of a homogeneous Ti film at 1020°C for 2 h, followed by the diffusion of Ti strips at the same temperature for 2 h again. These waveguides with a loss as low as 0.3 dB/cm have smaller cross section sizes, larger surface refractive index increment, and a mode field depth that is half as shallow as the conventional Ti:LiNbO 3 waveguide, satisfying the requirement by photonic crystal fabrication. The Ti 4+ -concentration profile was characterized by secondary ion mass spectrometry. The 2-D refractive index profile model is proposed for the peculiar waveguide structure. On the basis of the index model, we have simulated the mode field distribution using the beam propagation method. The results show that the theory is in good agreement with the experiment, verifying the validity of the proposed index model. © 2012 IEEE.

Research Area(s)

  • photonic crystal, Ti:LiNbO 3 strip waveguide

Citation Format(s)

Shallow Ti: LiNbO 3 strip waveguide. / Hua, Ping-Rang; Chen, Bei; Zhao, Quan-Zhou et al.
In: IEEE Photonics Journal, Vol. 4, No. 2, 6178755, 2012, p. 520-527.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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