Shallow Ti : LiNbO 3 strip waveguide
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Article number | 6178755 |
Pages (from-to) | 520-527 |
Journal / Publication | IEEE Photonics Journal |
Volume | 4 |
Issue number | 2 |
Publication status | Published - 2012 |
Link(s)
DOI | DOI |
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Attachment(s) | Documents
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-84859958029&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(2639943d-b10b-428f-9e1f-230519eb75b6).html |
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.
In: IEEE Photonics Journal, Vol. 4, No. 2, 6178755, 2012, p. 520-527.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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