Figure 8 | Scientific Reports

Figure 8

From: Tailoring far-infrared surface plasmon polaritons of a single-layer graphene using plasmon-phonon hybridization in graphene-LiF heterostructures

Figure 8

(a) Dispersion, (b) propagation length, (c) localization length, (d) figure of merit of the SPPPs supported by air/graphene/LiF/glass waveguide with t = 100 nm for μ = 0.05 eV (dashed brown lines), 0.1 eV (solid green lines), 0.2 eV (solid blue lines), 0.3 eV (dashed red lines), 0.5 eV (dotted black lines), and 0.7 eV (dashed pink lines). The FB point in panel (a) indicates the frequency and wavenumber, at which the forwardly propagating modes are turned to propagate backwardly and vice versa. Panel (e) illustrates the changes in the frequency and wavenumber at the FB point via variations in μ. (f) FoM of the guided modes supported by the case of graphene/100 nm LiF/glass for different values of τ.

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