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

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

Research output: Contribution to journalConference article

22 Citations (Scopus)

Abstract

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
JournalFerroelectrics
Volume257
Issue number1
DOIs
StatePublished - Dec 1 2001
Event5th Euroconference on Application of Polar Dielectrics, ECAPD-5 - Jurmala, Latvia
Duration: Aug 28 2000Aug 30 2000

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Infrared absorption
Optical devices
Ferroelectric materials
engineering
infrared absorption
damage
Crystals
Doping (additives)
Photoconductivity
Stoichiometry
doped crystals
Single crystals
photoconductivity
crystals
stoichiometry
electrical resistivity
lithium tantalate oxide
lithium niobate
single crystals

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Kitamura, K. ; Furukawa, Y. ; Takekawa, S. ; Hatanaka, T. ; Ito, H. ; Gopalan, Venkatraman. / Non-stoichiometric control of LiNbO3 and LiTaO3 in ferroelectric domain engineering for optical devices. In: Ferroelectrics. 2001 ; Vol. 257, No. 1. pp. 235-243.
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Non-stoichiometric control of LiNbO3 and LiTaO3 in ferroelectric domain engineering for optical devices. / Kitamura, K.; Furukawa, Y.; Takekawa, S.; Hatanaka, T.; Ito, H.; Gopalan, Venkatraman.

In: Ferroelectrics, Vol. 257, No. 1, 01.12.2001, p. 235-243.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Non-stoichiometric control of LiNbO3 and LiTaO3 in ferroelectric domain engineering for optical devices

AU - Kitamura, K.

AU - Furukawa, Y.

AU - Takekawa, S.

AU - Hatanaka, T.

AU - Ito, H.

AU - Gopalan, Venkatraman

PY - 2001/12/1

Y1 - 2001/12/1

N2 - 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.

AB - 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.

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