Plasmonic Magnetic Nanostructure

ORAL

Abstract

AFM manipulation technique has been used to position individual 100 nm gold nanospheres into a subwavelength plasmonic metamolecule nanoring consisting of four closely spaced nanoparticles. This structure supported a strong magnetic response coupled to a broad electric responce in the visible range. Asymmetries in the assembled nanoring enable the interaction between electric and magnetic modes, leading to the first observation of a magnetic-based Fano scattering resonance at optical frequencies. Such a metamolecule is suitable building block for negative-index metamaterials. AFM manipulation technique gave us ability to modify the nanostructure in real time while we were monitoring the elctric and magnetic responses of the nanostructure.

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Authors

  • Farbod Shafiei

    • The university of Texas at Austin
    • The University of Texas at Austin

  • Francesco Monitcone

    • The University of Texas at Austin

  • Khai Q. Le

    • The University of Texas at Austin

  • Xing-Xiang Liu

    • The University of Texas at Austin

  • Thomas Hartsfield

    • The University of Texas at Austin

  • Andrea Alu

    • The University of Texas at Austin

  • Xiaoqin Li

    • The University of Texas at Austin