ABSTRACT
The paper that best embodies the genesis of processes involved in
plasmonics of nanostructured materials is the one by the Russian
physicist Veselago (1968). In his visionary work, he lays the
foundation of many topics that have been clarified in recent years.
Plasmonics is a branch of optics that investigates the behavior of
electromagnetic (EM) waves in the visible range in nanostructured
materials. In order to study the propagation of EM waves in matter,
the dispersion equation represents the starting point:∣∣∣∣ω2c2 εi lμl j − k2δi j + kikj ∣∣∣∣ = 0 (1.1)
