Negative refractive index response of weakly and strongly coupled optical metamaterials
Negative refractive index response of weakly and strongly coupled optical metamaterials
We present a detailed study of the retrieved optical parameters, electrical permittivity $\ensuremath{\epsilon}$, magnetic permeability $\ensuremath{\mu}$, and refractive index $n$ of the coupled-fishnet metamaterial structures as a function of the separation between layers. For the weak-coupling case, the retrieved parameters are very close to the one-functional-layer results and converge relatively …