BaTiO3-SrTiO3 multilayer thin film electro-optic waveguide modulator

Jussi Hiltunen, Dilan Seneviratne, Rong Sun, Michael Stolfi, Harry Tuller, Jyrki Lappalainen, Vilho Lantto

    Research output: Contribution to journalArticleScientificpeer-review

    21 Citations (Scopus)

    Abstract

    Mach-Zehnder electro-optic waveguide modulators were fabricated based on BaTiO3 (BTO)-SrTiO3 (STO) multilayer thin film stacks grown on single crystal MgO substrates by pulsed laser deposition. X-ray diffraction measurements confirmed the formation of a BTO-STO superlattice with periodicity of 11unit cells. Strip-loaded waveguides were formed by patterning a SixNy film deposited onto the BTO-STO stack while Al electrodes of 3mm length and 13μm separation were fabricated in the vicinity of the active waveguide arm of the Mach-Zehnder modulator. An effective electro-optic coefficient of 73pm∕V at 1550nm wavelength was determined for the deposited BTO-STO superlattice by measuring the output intensity as a function of applied electric field.
    Original languageEnglish
    Pages (from-to)242904-242906
    Number of pages3
    JournalApplied Physics Letters
    Volume89
    Issue number24
    DOIs
    Publication statusPublished - 2006
    MoE publication typeA1 Journal article-refereed

    Keywords

    • ferroelectric
    • waveguide
    • electro-optic
    • superlattice

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