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Research on defects and domain characteristics of MgO-doped near-stoichiometric lithium tantalate in room-temperature polarization process

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  • Condensed Matter Physics
  • Published:
Chinese Science Bulletin

Abstract

MgO-doped congruent and near-stoichiometric lithium tantalate single crystals were grown by Czochralski technique and flux method respectively. Optical absorption studies showed that the UV absorption edge was very sensitive to the composition of the crystals and the decrease in defects led to the blue-shift of the UV-edge. The unit domain shape also related to the composition, and the observed results of the crystal wafers that etched by hydrofluoric acid indicate that the domain structure of near-stoichiometric lithium tantalate is hexagonal. Domain movement characteristics in the room-temperature polarization process and the asymmetry between the domain walls of periodically poled lithium tantalate crystals are discussed in detail. Room-temperature polarization experiment of the grown crystal wafers with 1.8 mm thickness was carried out and periodical structures were obtained.

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Authors and Affiliations

  1. School of Astronautics, Harbin Institute of Technology, Harbin, 150001, China

    BaoShen Jia, YeQuan Zhao & XueFeng Zhang

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  1. BaoShen Jia
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  2. YeQuan Zhao
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  3. XueFeng Zhang
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Corresponding author

Correspondence to BaoShen Jia.

Additional information

This work was supported by CTEC (Grant No. 0708031).

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Jia, B., Zhao, Y. & Zhang, X. Research on defects and domain characteristics of MgO-doped near-stoichiometric lithium tantalate in room-temperature polarization process. Chin. Sci. Bull. 55, 11–15 (2010). https://doi.org/10.1007/s11434-009-0600-x

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  • DOI: https://doi.org/10.1007/s11434-009-0600-x

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