Assembly of "3D" plasmonic clusters by "2D" AFM nanomanipulation of highly uniform and smooth gold nanospheres

Kyung Jin Park, Ji Hyeok Huh, Dae Woong Jung, Jin Sung Park, Gwan H. Choi, Gaehang Lee, Pil J. Yoo, Hong Gyu Park, Gi Ra Yi, Seungwoo Lee

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    25 Citations (Scopus)

    Abstract

    Atomic force microscopy (AFM) nanomanipulation has been viewed as a deterministic method for the assembly of plasmonic metamolecules because it enables unprecedented engineering of clusters with exquisite control over particle number and geometry. Nevertheless, the dimensionality of plasmonic metamolecules via AFM nanomanipulation is limited to 2D, so as to restrict the design space of available artificial electromagnetisms. Here, we show that "2D" nanomanipulation of the AFM tip can be used to assemble "3D" plasmonic metamolecules in a versatile and deterministic way by dribbling highly spherical and smooth gold nanospheres (NSs) on a nanohole template rather than on a flat surface. Various 3D plasmonic clusters with controlled symmetry were successfully assembled with nanometer precision; the relevant 3D plasmonic modes (i.e., artificial magnetism and magnetic-based Fano resonance) were fully rationalized by both numerical calculation and dark-field spectroscopy. This templating strategy for advancing AFM nanomanipulation can be generalized to exploit the fundamental understanding of various electromagnetic 3D couplings and can serve as the basis for the design of metamolecules, metafluids, and metamaterials.

    Original languageEnglish
    Article number6045
    JournalScientific reports
    Volume7
    Issue number1
    DOIs
    Publication statusPublished - 2017 Dec 1

    Bibliographical note

    Publisher Copyright:
    © 2017 The Author(s).

    ASJC Scopus subject areas

    • General

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