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  11. In-depth Study Of Emission Dynamics In (dy,tb):luag Transparent Ceramics

In-depth study of emission dynamics in (Dy,Tb):LuAG transparent ceramics

Angela Pirri, Enrico Cavalli, Jiang Li

    Optics Express
    |June 14, 2025

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    View abstract on PubMed

    Summary
    This summary is machine-generated.

    This study fabricated Dy:Lu3Al5O12 ceramics co-doped with Tb3+ for potential yellow laser applications. Spectroscopic analysis confirmed efficient energy transfer, enhancing Dy3+ yellow emission.

    Area of Science:

    • Materials Science
    • Solid-State Physics
    • Luminescence

    Background:

    • Lutetium aluminum garnet (LuAG) is a promising host for phosphors and lasers.
    • Dysprosium (Dy3+) and Terbium (Tb3+) ions are known for their luminescence properties.
    • Co-doping with Tb3+ may enhance Dy3+ emission in LuAG ceramics.

    Purpose of the Study:

    • To fabricate and spectroscopically characterize Dy:Lu3Al5O12 ceramics co-doped with Tb3+.
    • To assess the potential of these ceramics as yellow-emitting laser materials.
    • To investigate the energy transfer mechanisms between Tb3+ and Dy3+.

    Main Methods:

    • Fabrication of Dy:Lu3Al5O12:Tb3+ ceramics via vacuum pre-sintering and hot isostatic pressing (HIP).

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  • Spectroscopic characterization including absorption and emission measurements at room temperature and 10 K.
  • Application of the Judd-Ofelt parametrization scheme to analyze absorption transitions.
  • Investigation of excited state dynamics and energy transfer processes.

    • Main Results:

    • Room temperature absorption transitions of Dy3+ were modeled using the Judd-Ofelt scheme, yielding Ωt parameters.
    • Radiative properties of Dy3+ were estimated, considering near-infrared bands and the 6F11/2←6H15/2 transition.
    • Emission measurements revealed Stark structures of Tb3+ and Dy3+ due to efficient energy transfer.
    • A novel method was proposed to quantify the beneficial effect of Tb3+ co-doping on Dy3+ yellow emission.

    Conclusions:

    • The fabricated Dy:Lu3Al5O12:Tb3+ ceramics show potential as yellow laser materials.
    • Efficient energy transfer from Tb3+ to Dy3+ enhances the yellow emission channel.
    • Spectroscopic characterization provides a basis for optimizing these materials for laser applications.