Fano resonance in 3D system of metallic nanoparticles

Resumo

Computations for the Fano resonance in a 3D system of identical prolate metallic nanospheroids located at the vertices of a regular tetrahedron are presented. The long axis of one of the spheroids is oriented along the symmetry axis of the third order of the tetrahedron (Z-axis), and the long axes of the remaining three spheroids lie in the orthogonal plane forming angles 2π/3 with each other. The polarization vector of the incident light wave oscillates along the Z-axis and directly excites plasmon oscillations in only one spheroid. The results of computations are given, which show the strong nonuniformity of energy distribution between spheroids for various orientations of spheroids perpendicular to the Z-axis.