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. (C) 2012 Optical Society of America
This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Chakrabarty, Ayan; Wnag, Feng; Minkowski, Fred; Sun, Kai; Wei, Qi-Huo (2012). Cavity Modes and Their Excitations in Elliptical Plasmonic Patch Nanoantennas. Optics Express 20(11) 11615-11624. Retrieved from https://oaks.kent.edu/cpippubs/367