Non-stoichiometric control of LiNbO3 and LiTaO3 in ferroelectric domain engineering for optical devices

K. Kitamura, Y. Furukawa, S. Takekawa, T. Hatanaka, H. Ito, V. Gopalan

Research output: Contribution to journalConference articlepeer-review

30 Scopus citations


Photorefractive damage, photoconductivity, and photogalvanic currents of stoichiometry controlled LiNbO3 and LiTaO3 have been investigated. A nearly stoichiometric LiNbO3 single crystal shows a lower photorefractive damage resistance than congruent LiNbO3, however, crystals doped with a small amount of MgO (> 0.78 mol.%) exhibit no measurable photorefractive damage at 532 nm up to intensities of 2 MW/cm2. In the case of LiTaO3, it turned out that nearly stoichiometric crystals exhibit considerably high damage resistivity even without MgO doping. Green-induced infrared absorption (GRIIRA) in the crystals was also investigated by a photothermal technique. The GRIIRA in nearly stoichiometric LiNbO3 is found to be remarkably decreased by a small amount of MgO. GRIIRA in nearly stoichiometric LiTaO3 was strongly suppressed even without MgO doping.

Original languageEnglish (US)
Pages (from-to)235-243
Number of pages9
Issue number1
StatePublished - Dec 1 2001
Event5th Euroconference on Application of Polar Dielectrics, ECAPD-5 - Jurmala, Latvia
Duration: Aug 28 2000Aug 30 2000

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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