Figure 6
From: Cloaking, trapping and superlensing of lamb waves with negative refraction
Transporting an evanescent wave-field in the far-field by means of an elastic superlens. (a,b) Normal displacement magnitude at plate surface without (a) and with (b) metalenses (SimSonic3D software 33, www.simsonic.fr). (c) Evolution along the x-direction of the evanescent component magnitude of the wave-field (averaged over \(|k_y|>k_c\)) without (blue) and with (red) metalenses. (d) Normal displacement magnitude along the y-axis in the imaging plane (\(x=120\) mm) (blue) without and (red) with metalenses. (e) Spatial Fourier transform of the image wave-field without (blue) and with (red) metalenses. (f) High-pass filter applied to the image wave-field in order to point out the evanescent component contribution to the focusing. (g) Spatial Fourier transform of the filtered image wave-field. In panels (d)–(g), the displacement magnitude is shown in dB.
