Crystal growth and characterization of titanium-doped near-stoichiometric LiNbO3

Masaru Nakamura*, Shunji Takekawa, Sunao Kurimura, Kenji Kitamura, Hirochika Nakajima

*この研究の対応する著者

    研究成果: Article査読

    14 被引用数 (Scopus)

    抄録

    Titanium-doped near-stoichiometric LiNbO3 (SLN) crystals were grown from lithium-rich solutions with a Ti concentration of up to approximately 20mol% by a top-seeded solution-growth (TSSG) method. Ti-doped SLN (Ti:SLN) crystals with a Ti concentration of up to 9mol% were free from inclusions, voids, cracks, or mechanical twins. The effective distribution coefficient keff for Ti in the Ti:SLN crystals was found to be approximately 0.45±0.05 for the Nb atom in the above composition range. The Ti-doping effects on Curie temperature, UV absorption edge, changes in the ordinary and extraordinary refractive indexes (Δno and Δne), and lattice constants were investigated. The Curie temperature for the Ti:SLN crystals linearly decreased with increasing Ti concentration up to 9mol%. Both Δno and Δne linearly increased with increasing Ti concentration up to 9mol%, and Δne was much larger than Δno over the entire wavelength range from 440 to 1550nm. The UV absorption edge for the Ti:SLN crystals shifted to longer wavelengths with increasing Ti concentration. The a- and c-axes lattice constants in the Ti:SLN crystals decreased with increasing Ti concentration. In addition, a photoelastic effect on the refractive-index changes in the Ti:SLN crystal was estimated from the lattice-constant data.

    本文言語English
    ページ(範囲)339-345
    ページ数7
    ジャーナルJournal of Crystal Growth
    264
    1-3
    DOI
    出版ステータスPublished - 2004 3月 15

    ASJC Scopus subject areas

    • 凝縮系物理学

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