This paper numerically examines the excitation of surface plasmon polaritons (SPPs) in two-dimensional nanoresonators. The SPPs wave field is defined as a 2D array of coupled, recursive digital filters interacting with a point radiation source. Within the discrete model, we analyze SPP distributions in elliptical nanoresonators, which are regions confined on the gold surface at the metal-dielectric interface.
The dynamics of metal conduction electrons are taken into account using coupled equations for the electric field and polarization. The composition of the resonant field is determined by a two-dimensional Fourier-Bessel transform. The results show that the excited mode structure and field amplitude depend on the nanoresonator geometry and the position of the center or edge point of the source. We identified the optimal source placement for exciting fundamental or higher-order modes in different geometries. The findings are crucial for designing plasmonic devices with tailored near-field distributions.
Author Biography
Marina Antonovna Zagrebina, South Ural State University, Chelyabinsk; Chelyabinsk State University, Chelyabinsk
Post-graduate Student, Equations of Mathematical Physics Department, Assistant, Physics of Nanoscale Systems Department; Laboratory Research Assistant
