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Pépite | Conception de matériaux acoustiques artificiels structurés : super-réseaux piézoélectriques, lentilles à gradient d'indice, plaque de cristaux phononiques à base de piliers

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Figure 1.3 (A) Schematic representation of local resonance [2] , (B) and (C) Schematic illustration of the  dynamic behaviors of locally resonant metamaterials with negative effective mass density and bulk
Figure 2.3 Upper panel: normalized real part (solid) and phase (dotted) of the effective mass density (a)  and elastic modulus (b) under the electrically open (red) or closed (blue) status for a single unit AM; lower
Figure 2.6 Under the electrically closed status for one- (red), two- (blue), three- (black) and ten- (green)  unit AM: real part of the effective mass density (a) and elastic modulus (b); phase of the effective mass
Figure 2.7 Effect of the number of unit on the double negative bandwidth
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