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Perfect Brewster transmission through ultrathin perforated films

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Academic year: 2021

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Figure 1: Scattering of an acoustic wave at oblique incidence θ on a perforated film. The mass densities and sound velocities are (ρ i , c i ) in the film material and (ρ m , c m ) in the matrix;
Figure 2: Perfect transmission at the Brewster angle. Reflection |R| computed numerically (in colorscale with saturation for |R| > 0.1) against the incidence θ and the film thickness ke (ϕ = 0.5 and kh = 1) (a) with ρ i /ρ m = 10 −3 and χ i /χ m = 1, (b
Figure 3: Reflection spectra against θ and log 10 (ke) for kh = 1 (ρ i /ρ m = 10 −3 and χ r = 1).
Figure 4: Profile of |R| against θ from figure 3 for ke = 0.1. Plain blue line shows |R num |, dotted yellow lines |R| from the effective interface model (12), and dashed grey line from the classical effective medium model (6)-(7)
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