Figure 4. Simulation for the proposed effective dielectric layer in TM polarization.

(a) Contour plots of the spectral absorption at normal incidence with the air section in Fig. 1(a) replaced by dielectric medium of ε = 1.96. (b) Contour plots of the spectral absorption as a function of incidence angle θ with t₁ − t₀ = 1.5 μm. (c,d) Modes distribution and total electric field amplitude distribution at (1.5 μm, 8.6 μm) at normal incidence, respectively.