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Updated: Jun 2, 2025

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Single-crystal CsPbBr3-based vertical cavity surface emitting laser.

Shunya Aoyagi, Zhan Su, Gouen Weng

    Optics Letters
    |January 16, 2025
    PubMed
    Summary
    This summary is machine-generated.

    We developed a high-performance laser using a single-crystal cesium lead bromide (CsPbBr3) microplatelet. This novel approach demonstrates efficient single-mode lasing with a low threshold, paving the way for advanced perovskite optoelectronic devices.

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    Area of Science:

    • Materials Science
    • Optoelectronics
    • Photonics

    Background:

    • All-inorganic perovskites exhibit excellent optoelectronic properties for devices like lasers, LEDs, and solar cells.
    • High-quality single crystals are crucial for enhancing device performance.
    • Vertical cavity surface emitting lasers (VCSELs) are key components in optical communication and sensing.

    Purpose of the Study:

    • To present a high-performance VCSEL utilizing a single-crystal CsPbBr3 microplatelet.
    • To demonstrate a simple solution-based fabrication method for perovskite single-crystal devices.
    • To investigate the lasing characteristics and dynamics of the fabricated VCSEL.

    Main Methods:

    • Fabrication of a VCSEL by sandwiching a single-crystal CsPbBr3 microplatelet between two distributed Bragg reflectors (DBRs) using a solution process.
    • Characterization of lasing performance, including threshold, mode, and Q-factor.
    • Time-resolved photoluminescence (TRPL) measurements using a streak camera to analyze lasing dynamics.

    Main Results:

    • Achieved single-mode lasing at 542 nm from the CsPbBr3 VCSEL.
    • Demonstrated a low lasing threshold of 5 µJ/cm2.
    • Obtained a high Q-factor of 2893 and observed picosecond-scale lasing dynamics via TRPL.

    Conclusions:

    • A novel and effective approach for fabricating high-performance laser devices using perovskite single-crystal microplatelets has been presented.
    • The developed CsPbBr3 VCSEL shows significant potential for applications requiring efficient and stable light emission.
    • This work highlights the promise of single-crystal perovskites in advancing optoelectronic laser technologies.