Research / 2019 / Article / Fig 4

Research Article

Targeted Double Negative Properties in Silver/Silica Random Metamaterials by Precise Control of Microstructures

Figure 4

Frequency dispersion of real permittivity (ε′) for Ag/SiO2 composites (a, b); permittivity dispersion of Ag35 with calculation results (c). Frequency dependence of phase angle θ for Ag/SiO2 composites with different silver content (d). The dashed line is the calculated curve only by Drude model, the dash-dotted line is the calculated curve only by Lorentz model, and the solid line is calculated curve by both. The inset in (d) is the equivalent circuit of composites when the silver content is above percolation threshold.