Fig. 2: The fabricated sample and experimental set-up. | Nature Communications

Fig. 2: The fabricated sample and experimental set-up.

From: Creation of acoustic vortex knots

Fig. 2

a, b show the photograph of the fabricated metamaterials sustaining Hopf link and trefoil knot vortex loops, respectively. Both samples are about 45 × 45 cm2 in the transverse plane and the thickness is about 8.86 cm. c The schematic diagram of the experimental set-up.

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