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Figure 5


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Reflection coefficient spectra of linear ABHs calculated employing the 1D model based on the Riccati equation (blue lines), and 2D finite element model (red lines), for different parameters: (a) −N = 500, ξ = 0.5, (b) −N = 250, ξ = 0.25, (c) −N = 250, ξ = 0.5, (d) −N = 250, ξ = 0.75.

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