Dispersion Relations as a Method for Studying the Optical Properties of Metasurfaces

We investigated the possibility of controlling the optical properties of plasmons on the metasurface. Extensive possibilities for controlling the properties of light waves at the nanoscale by tuning the parameters of the metasurface can form the basis for creating photonic devices with improved spectral characteristics. The considered structure consists of the continuous corrugated Au metasurface supported by the opal-like photonic crystal. The interaction of optical Τamm states of an opal-like crystal with surface plasmons results in optical modes that exhibit polarization sensitivity. We also study this mode from the perspective of dispersion. The specific behavior of dispersion curves obtained in the numerical simulation open the way to control the dispersion of these modes as well. The result of our study is the obtained dispersion relations for the corrugated Au metasurface.