A Design of Functional Layer with Robust Constitutive Parameters for Multilayer Metamaterials

Figure 2

(a) The schematic picture of a unit cell of symmetric fishnet functional layer and (b) sketch of a unit cell of 5-functional-layer fishnet structures. (c) The real part of effective index for 2-functional-layer, 3-functional-layer, 4-functional-layer, and 5-functional-layer fishnet structures retrieved from the simulated scattering parameters. (d) Transmission and reflection spectra of real 5-functional-layer fishnet slab and the hypothetical homogenous slab with the thickness of 5-layer fishnet structure and the effective parameters of one-layer structure. The results are calculated for normal incidence of a plane wave, and the spectra are normalized to the intensity of the incident wave.

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