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    Area of Science:

    • Plasmonics and Nanophotonics
    • Optical Metamaterials

    Background:

    • Asymmetric plasmonic nanostructures enable directional control of light.
    • Understanding nanoparticle interactions is crucial for tailoring optical responses.

    Purpose of the Study:

    • Investigate the impact of asymmetry and nanoparticle interactions on directional optical properties.
    • Enhance directional optical absorption in nanostructures.

    Main Methods:

    • Theoretical investigation of asymmetric plasmonic nanostructures.
    • Modeling optical responses of truncated nanocones and interacting nanodisks.
    • Analyzing the role of geometrical asymmetry and inter-nanoparticle coupling.

    Main Results:

    • Dividing a single truncated nanocone into interacting nanodisks enhances directionality without altering geometrical asymmetry.
    • Achieved a sixfold increase in directional optical absorption using four nanodisks in a conical arrangement.
    • Observed constructive interference of excited modes within the nanodisks contributes to enhanced directionality.

    Conclusions:

    • Nanoparticle interactions significantly amplify directionality in asymmetric plasmonic systems.
    • Configuring nanodisks in a conical array offers a pathway to high directional optical absorption.
    • The findings provide insights for designing advanced optical devices with tailored light manipulation capabilities.