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    Area of Science:

    • Quantum optics
    • Nanophotonics
    • Materials science

    Background:

    • Quantum emitters' properties are influenced by their surrounding electromagnetic environment.
    • Enhancing spontaneous emission and far-field detection is critical for quantum technologies and sensing.

    Purpose of the Study:

    • To investigate nanostructures for enhancing quantum vacuum properties at ultraviolet wavelengths.
    • To simultaneously improve spontaneous transition rates and far-field detection rates of quantum emitters.

    Main Methods:

    • Analytic decomposition of electromagnetic response using plane waves and discrete modes.
    • Simulating nanostructures, including nanorods coupled with aluminum substrates, in the 200-400 nm range.
    • Analyzing field enhancement at the emitter and radiation pattern reshaping.

    Main Results:

    • Coupling a nanorod with an aluminum substrate significantly enhances decay rates (up to 2.7 × 10^3) and far-field emission (824-2.04 × 10^3).
    • These enhancements are attributed to field amplification and radiation pattern modification near resonances.
    • Aluminum substrates outperform nanoparticle or fused silica substrates for this purpose.

    Conclusions:

    • Nanostructure design, specifically nanorod-aluminum substrate coupling, offers a powerful method to control quantum vacuum properties.
    • The demonstrated enhancements are highly beneficial for sensitive fluorescence detection and hold potential for nano-laser applications.
    • Tunable resonances allow for optimization of these effects for specific applications.