Tuning field extinction by non-spherical plasmonic particles as nanoantennas

The concept of plasmonic nanoantennas is based on using nano-structures to confine light in nanometer scale. In this paper, we study the scattering property of ellipsoidal particles at optical frequencies. Numerical results illustrate how the Extinction Cross Section of ellipsoidal core-shelled nanostructures depends on shape and dimension. As a significant idea, the gradual transformation from sphere to ellipsoid has been considered. This alteration in symmetry has interesting results on tuning outputs.