Mode Analyses of Subwavelength Periodic Metallic Structures With Finite Thickness

Deep-subwavelength periodic metallic structures, which are also called plasmonic metamaterials, have received much attention due to their ability of supporting spoof surface plasmons polariton (SPP) modes. However, it is still difficult to obtain the dispersion relations of different modes for complicated plasmonic metamaterials with finite thickness. To solve the problem, we make further developm...