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    Investigation of Fano resonances induced by higher order plasmon modes on a circular nano-disk with an elongated cavity

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    Type
    Article
    Authors
    Amin, Muhammad
    Bagci, Hakan cc
    KAUST Department
    Computational Electromagnetics Laboratory
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2014-01-13
    Online Publication Date
    2014-01-13
    Print Publication Date
    2012
    Permanent link to this record
    http://hdl.handle.net/10754/575903
    
    Metadata
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    Abstract
    In this paper, a planar metallic nanostructure design, which supports two distinct Fano resonances in its extinction cross-section spectrum under normally incident and linearly polarized electromagnetic field, is proposed. The proposed design involves a circular disk embedding an elongated cavity; shifting and rotating the cavity break the symmetry of the structure with respect to the incident field and induce higher order plasmon modes. As a result, Fano resonances are generated in the visible spectrum due to the destructive interference between the sub-radiant higher order modes and super-radiant the dipolar mode. The Fano resonances can be tuned by varying the cavity's width and the rotation angle. An RLC circuit, which is mathematically equivalent to a mass-spring oscillator, is proposed to model the optical response of the nanostructure design.
    Citation
    Amin, M., & Bağci, H. (2012). INVESTIGATION OF FANO RESONANCES INDUCED BY HIGHER ORDER PLASMON MODES ON A CIRCULAR NANO-DISK WITH AN ELONGATED CAVITY. Progress In Electromagnetics Research, 130, 187–206. doi:10.2528/pier12040507
    Sponsors
    This work was supported in part by a Academic Excellence Alliance (AEA) program award from King Abdullah University of Science and Technology (KAUST) Global Collaborative Research (GCR) under the title "Energy Efficient Photonic and Spintronic Devices".
    Publisher
    EMW Publishing
    Journal
    Progress in Electromagnetics Research
    DOI
    10.2528/pier12040507
    ae974a485f413a2113503eed53cd6c53
    10.2528/pier12040507
    Scopus Count
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