Green Function Formulism for Electromagnetic Wave Generated in Nanostructured Metamaterial of Finite Thickness: Isotropy and Anisotropy
Figure 2
Schematic illustration of eigenmode expansion in three regions: and denote the eigen-plane-wave modes in region I, and the minus sign is to denote the direction of propagating is along − direction; in region II denotes the first eigenmode generated from the source plane, is to denote the second eigenmode generated from the source plane, in region II expresses the first eigenmode bouncing back at the upper and lower boundaries, and gives the second eigenmode bouncing back at the upper and lower boundaries (the plus and minus signs denotes the propagating along + and − directions); and denote the eigen-plane wave modes in region III, and the minus sign is to denote the direction of propagating is along + direction.
