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

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

    Research output: Contribution to journalArticle

    13 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)339-345
    Number of pages7
    JournalJournal of Crystal Growth
    Volume264
    Issue number1-3
    DOIs
    Publication statusPublished - 2004 Mar 15

    Keywords

    • A1. Characterization
    • A2. Growth from solutions
    • A2. Top seeded solution growth
    • B1. Oxides
    • B2. Ferro-electric materials
    • B2. Nonlinear optical materials
    • B3. Nonlinear optical

    ASJC Scopus subject areas

    • Condensed Matter Physics

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