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Nano Convergence
Fig. 3 | Nano Convergence

Fig. 3

From: Acoustic wave science realized by metamaterials

Fig. 3

a–d are adapted from [20]

Experiment of 1D spring-mass system. a Setup scheme. b Actual picture of the experimental setup. c Ratio between displacement amplitudes of masses m and M 0 for a single unit cell. d Left-hand side shows the dispersion relation predicted (q is the Bloch wave-vector and a is the lattice constant). Right-hand side shows the transmittance for the whole system and the negative transmittance indicates a negative mass density.

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