Congruent lithium niobate crystal with a stoichiometric structure

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  • UDA Satoshi
    Institute for Materials Research, Tohoku University

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Other Title
  • コングルエント組成と化学量論組成が一致するニオブ酸リチウムの開発
  • コングルエント ソセイ ト カガクリョウロン ソセイ ガ イッチ スル ニオブサン リチウム ノ カイハツ

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Abstract

<p>Combining the conventional concept of “congruent” with the essentially new concept of “stoichiometry”; a material with the activities of its constituent elements being unity is stoichiometric, we have developed cs-MgO:LiNbO3 and cs-MgO:LiTaO3 by introducing Mg and a vacancy, both of which are simultaneously congruent and stoichiometric. They yield no segregation of ionic species during growth so that there is no compositional change in the growing crystals even if they experience an unexpected perturbation, which is not possible with the conventional congruent LiNbO3 (c-LiNbO3). They are easy to grow with an extremely homogeneous composition and are effective at achieving excellent nonlinear optical properties. The growth fundamentals are thermodynamically and experimentally explained.</p>

Journal

  • Oyo Buturi

    Oyo Buturi 88 (10), 653-658, 2019-10-10

    The Japan Society of Applied Physics

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