Numerical demonstration of compound structure broad pass-band optical metamaterial filter

Enhanced transmittance of a dual pass-band metamaterial filter

“…Here, ω = 1.37 × 10 s p 16 −1 is the plasma frequency and γ = 9 × 10 s D 13 −1 is the collision frequency [18,21]. The chosen pattern exhibits excellent transmission performance in simulation and experiment.…”

“…However, few of these arrays are designed in an attempt to produce a tunable dual pass-band filter. Zhong et al [18] propose an optical metamaterial filter with a modified fishnet structure. A broad pass-band is obtained because of the coupling of the localized surface plasmon (LSP) modes between the upper and lower silver layers.…”

“…Each unit cell contains two silver layers and one dielectric layer. SU-8 is chosen as the dielectric layer material and the dielectric constant is 2.56 [18,19]. Each unit cell has dimensions of P=4 µm, L=2.1 µm, R=0.8 µm.…”

“…1(a)-(b) are assigned to ideal conductor boundaries. Two ideal magnetic conductor planes have been used on the boundary normal to the x-axis and two ideal electric conductor planes have been used on the boundary normal to the y-axis [18,20]. Drude model is used to describe the property of silver at optical frequencies:…”

“…3(b), which lead to the pass-band shown in Fig. 2(b) [18]. For the designed structure with only one silver layer, the pass-band shown in Fig.…”