fig5

From: An integrated bifunctional metamaterial perfect absorber for high-efficient broadband absorption and narrowband refractive index detection

$An integrated bifunctional metamaterial perfect absorber for high-efficient broadband absorption and narrowband refractive index detection$

Figure 5. Simulated broadband absorption spectra of the BMA based on ZrN under vertical incidence demonstrate the effects of fixed parameters on optical performance: ring thickness variation with fixed parameters of h₁ = 40 nm (A), h₂ = 20 nm (B), h₃ = 10 nm (C), and h₄ = 40 nm (D); ring radius variation with R₁ = 40 nm (E), R₂ = 70 nm (F) and R₃ = 110 nm (G); and SiO₂ spacer layer thickness variation with h_SiO2 = 170 nm (H). The insets illustrate the corresponding average absorption changes as a function of parameter variation. BMA: Bifunctional metamaterial absorber; ZrN: zirconium nitride.