magnetic and electric solid-state plasmon spherical resonators

Electrodynamic study of solid-state plasmon spherical resonators applicable in the range from microwave to optical frequencies is undertaken. influence of dimensions and electromagnetic properties of media on the resonance frequency and q-factor of these resonators is analyzed. it is shown that transcendental equations resulting from electrodynamic analysis of plasmon resonators can be also applied to the analysis of whispering gallery resonators if the resonator’s medium is isotropic, although this is a completely different kind of a resonator. special attention is focused on the q-factor analysis and theoretical and practical q-factor limits for the magnetic plasmon and the electric plasmon resonators. in the addition, the impact of the finite size of a resonator on the resonance frequency and q-factor is considered. computations of the resonance frequency and q-factor of magnetic plasmon resonators are supported by experiments performed at microwave frequencies.