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  • Title: Cavity modes and their excitations in elliptical plasmonic patch nanoantennas.
    Author: Chakrabarty A, Wang F, Minkowski F, Sun K, Wei QH.
    Journal: Opt Express; 2012 May 21; 20(11):11615-24. PubMed ID: 22714147.
    Abstract:
    We present experimental and theoretical studies of two dimensional periodic arrays of elliptical plasmonic patch nanoantennas. Experimental and simulation results demonstrate that the azimuthal symmetry breaking of the metal patches leads to the occurrence of even and odd resonant cavity modes and the excitation geometries dependent on their modal symmetries. We show that the cavity modes can be described by the product of radial and angular Mathieu functions with excellent agreements with both simulations and experiments. The effects of the patch periodicity on the excitation of the surface plasmon and its coupling with the cavity modes are also discussed.
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