Grating and plasmon resonances in the light scattering by finite silver nanostrip grating

Summarizing, we have studied the H-polarized electromagnetic wave scattering by finite silver nanostrip gratings in the visible range. The analysis has shown localized plasmon resonances of a stand-alone silver strip and grating resonances near to λ ≈ p/m, m = 1,2,... caused by the effect of periodicity. Here, the gratings of the larger numbers of strips have more pronounced grating resonances. The effect of enhanced scattering in the combined resonance has been revealed.