We introduce a platform based on plasmonic metamaterials to design various optical devices. A simple structure brokenring
with a nanodisk at the center is utilized to excite and hybridize the plasmon resonant modes. We show that the
proposed nanoantenna is able to support strong sub- and superradiant plasmon resonances because of its unique
geometrical features. Using the concentric ring/disk in a dimer orientation as a nanoantenna on a multilayer metasurface
consisting of graphene monolayer, we induced double sharp plasmonic Fano resonant modes in the transmission window
across the visible to the near-infrared region. Considering the strong polarization-dependency of the broken-ring/disk
dimer antenna, it is shown that the proposed plasmonic metamaterial can be tailored as an optical router device for fast
switching applications. This understanding opens new paths to employ plasmonic metamaterials with simple geometrical
nanoscale blocks for sensing and switching applications.
Arash Ahmadivand, Raju Sinha, and Nezih Pala, "Graphene plasmonics: multiple sharp Fano resonances in silver split concentric nanoring/disk resonator dimers on a metasurface," Proc. SPIE 9547, Plasmonics: Metallic Nanostructures and Their Optical Properties XIII, 954713 (Presented at SPIE Nanoscience + Engineering: August 11, 2015; Published: 28 August 2015); https://doi.org/10.1117/12.2188778.
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