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High performance lasing in a single ZnO microwire using Rh nanocubes.

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    Size-controlled rhodium nanocubes (RhNCs) with ultraviolet plasmonics enhance ZnO microwire near-band-edge emission. This leads to improved whispering gallery mode (WGM) lasing characteristics, showing potential for advanced optoelectronic devices.

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    Area of Science:

    • Materials Science
    • Nanotechnology
    • Optoelectronics

    Background:

    • Rhodium nanocubes (RhNCs) exhibit tunable ultraviolet plasmonic properties.
    • These properties are advantageous for integration with wide bandgap semiconductors and optoelectronic devices.
    • Compatibility with semiconductor micro/nanostructures is crucial for device performance.

    Purpose of the Study:

    • To synthesize high-purity, size-controlled RhNCs with ultraviolet plasmonic responses.
    • To investigate the enhancement of ZnO microwire emission and lasing characteristics using RhNCs.
    • To explore the modulation effects of RhNC plasmons on ZnO microwire optoelectronic properties.

    Main Methods:

    • Synthesis of size-controlled Rhodium nanocubes (RhNCs).
    • Incorporation of RhNCs onto ZnO microwires.
    • Optical pumping experiments using a femtosecond pulsed laser at room temperature.
    • Time-resolved photoluminescence (TRPL) and electromagnetic simulations.

    Main Results:

    • Significant enhancement of the near-band-edge emission from single ZnO microwires.
    • Achieved lower lasing threshold, higher Q-factor, and enhanced lasing output from RhNC-covered ZnO microwires.
    • Demonstrated ultraviolet energy-tunable plasmons in size-controlled RhNCs.

    Conclusions:

    • Size-controlled RhNCs with tunable ultraviolet plasmons can significantly enhance ZnO microwire lasing.
    • RhNCs improve whispering gallery mode (WGM) lasing performance, including threshold and Q-factor.
    • These findings highlight the potential of RhNCs for high-performance, short-wavelength optoelectronic devices.