Tamm plasmons in structures with quasiperiodic metal gratings

A theoretical study of structures with Tamm plasmons, where metal strips forming a one-dimensional periodic structure with a quasiperiodic unit cell on the surface of a structure are arranged in accordance with the Fibonacci sequence, have been theoretically studied. It has been shown that, when using the Fibonacci structure as a unit cell, additional band gaps appear in the band structure and the number of the bands, their total width, and the fraction of localized states in the eigenmode spectrum increase with the Fibonacci sequence number. In this case, all dispersion surfaces are combinations of paraboloids and hyperboloids, and the frequency of alternation of paraboloids and hyperboloids in the dispersion relation increases with the Fibonacci sequence number.