Electro-Optic Property of Mg2+/Er3+-Codoped LiNbO3 Crystal : Mg2+ Concentration Threshold Effect

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

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Author(s)

  • Wan-Ying Du
  • Zi-Bo Zhang
  • Shuai Ren
  • Wing-Han Wong
  • Dao-Yin Yu
  • De-Long Zhang

Detail(s)

Original languageEnglish
Pages (from-to)286-292
Journal / PublicationJournal of the American Ceramic Society
Volume100
Issue number1
Online published11 Oct 2016
Publication statusPublished - Jan 2017

Abstract

A series of Mg2+/Er3+-codoped congruent LiNbO3 crystals were grown by Czochralski method from the growth melts containing 0.5 mol% Er2O3 while varied MgO content from 0.0 to 7.0 mol%. The unclamped electro-optic coefficients γ13 and γ33 of these crystals were measured by Mach–Zehnder interferometry. Two different voltage-applying schemes were adopted: one is the DC voltage applied to the crystal via Al films coated onto crystal surfaces and another is via a pair of external Cu slab electrodes. The coefficients measured by the two schemes show similar strong dependence on Mg2+ concentration. The dependence is non-monotonous, dramatic, and unusual, and reveals the features of two Mg2+ concentration thresholds of optical damage: one in the Mg2+ concentration range of 1.2–2.0 mol% (in crystal) and another in 4.5–5.0 mol%. Around the threshold the electro-optic coefficient decreases abruptly at first and then recovers quickly, and the coefficient drops by >20% (12%) at the first (second) threshold, which exceeds the error 3% considerably. The dramatic behavior is qualitatively explained on the basis of the EO coefficient model of LiNbO3 and the defect structure model for Mg2+-doped LiNbO3.

Research Area(s)

  • dopants/doping, impurities, lithium niobate, optical materials/properties

Citation Format(s)

Electro-Optic Property of Mg2+/Er3+-Codoped LiNbO3 Crystal : Mg2+ Concentration Threshold Effect. / Du, Wan-Ying; Zhang, Zi-Bo; Ren, Shuai et al.

In: Journal of the American Ceramic Society, Vol. 100, No. 1, 01.2017, p. 286-292.

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