Figure 5
From: Terahertz characterization of two-dimensional low-conductive layers enabled by metal gratings
Effect of an optically thick substrate on the layer and grating response. (a) Illustration of the analyzed geometry. (image created in Adobe Illustrator v25.0.1, https://www.adobe.com/products/illustrator.html). (b) Transmittance versus sheet conductivity for a dispersion-free conductive layer suspended in free-space (dashed black curve) and on top of a semi-infinite substrate with relative permittivity εr = 10 (continuous green curve). Presence of a substrate shifts the characteristic curve towards higher conductivity levels. (c) Colormap of transmittance versus frequency and stripe width, W; S was fixed to S = 2 µm in the absence of a conductive layer, i.e., σs = 0. Presence of a substrate redshifts the resonances with respect to the situation simulated in Fig. 3a.
