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Related Experiment Video

Updated: Jun 3, 2026

Low-energy Cathodoluminescence for (Oxy)Nitride Phosphors
07:03

Low-energy Cathodoluminescence for (Oxy)Nitride Phosphors

Published on: November 15, 2016

Proximal selenium co-doping in Er:CaF2 crystal for efficient 2.75 µm lasers.

Fan Zhang, Xuan Tong, Wudi Wang

    Optics Letters
    |June 1, 2026
    PubMed
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    Anion-engineering in fluorite crystals, specifically Er,Se-co-doped CaF2, enhances erbium laser performance by reducing non-radiative relaxation. This breakthrough enables efficient mid-infrared laser operation with improved lifetimes and high slope efficiencies.

    Area of Science:

    • Materials Science
    • Laser Physics
    • Solid-State Chemistry

    Background:

    • Non-radiative relaxation is a major limitation in erbium-based mid-infrared lasers.
    • Developing novel materials is crucial for overcoming performance bottlenecks in laser technology.

    Purpose of the Study:

    • To investigate the impact of anion-engineering on erbium-doped fluorite crystals for laser applications.
    • To demonstrate efficient mid-infrared laser operation using a modified crystal structure.

    Main Methods:

    • Co-doping CaF2 crystals with Erbium (Er) and Selenium (Se).
    • Characterization of luminescence properties and lifetimes.
    • First-principles calculations to understand crystal lattice dynamics and ion interactions.
    • Laser performance testing under different pumping schemes.

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    Seeded Synthesis of CdSe/CdS Rod and Tetrapod Nanocrystals
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    Published on: December 11, 2013

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    Last Updated: Jun 3, 2026

    Low-energy Cathodoluminescence for (Oxy)Nitride Phosphors
    07:03

    Low-energy Cathodoluminescence for (Oxy)Nitride Phosphors

    Published on: November 15, 2016

    Close-Space Sublimation-Deposited Ultra-Thin CdSeTe/CdTe Solar Cells for Enhanced Short-Circuit Current Density and Photoluminescence
    12:21

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    Seeded Synthesis of CdSe/CdS Rod and Tetrapod Nanocrystals
    12:56

    Seeded Synthesis of CdSe/CdS Rod and Tetrapod Nanocrystals

    Published on: December 11, 2013

    Main Results:

    • Er,Se-co-doped CaF2 exhibited extended lifetimes compared to Er:CaF2.
    • First-principles calculations revealed Se2- proximity to Er3+ clusters and introduced low-frequency phonon modes.
    • Achieved efficient 2.75 µm continuous-wave laser operation.
    • Demonstrated high slope efficiencies of 34.4% (976 nm pumping) and 12.2% (1532 nm pumping).

    Conclusions:

    • Anion-engineering via Se-doping effectively suppresses non-radiative relaxation in Er:CaF2 lasers.
    • This approach facilitates efficient mid-infrared laser operation.
    • The study highlights the potential of anion-engineering for designing advanced laser materials.