Figure 1
From: Molding acoustic, electromagnetic and water waves with a single cloak
Overview of earlier results on waterwave cloak and new acoustic and electromagnetic experimental setups.
(a) artistic view of the experimental setup for linear surface water waves showing a source of light modulated by a perforated rotating disc, which illuminates a transparent vessel containing the liquid and the cloak, providing snapshots of wave pattern on a screen; (b-c) experimental results of reduced backscattering adapted from10 for a concentric liquid surface wave of frequency 10 Hz interacting with a rigid cylinder (7.6 cm in diameter) on its own (b) and the structured waterwave cloak (20 cm in diameter) (c); (d) artistic view of the experimental setup of the waterwave cloak tested in Fresnel Institute’s anechoic chamber, with a rigded horn antenna generating transverse electric microwaves with frequencies ranging from 1 to 6 GHz; the longitudinal magnetic field is measured with a magnetic probe (underneath the cloak); (e) photo of the cloak; (f) artistic view of the experimental setup in MIT for the waterwave cloak tested for pressure acoustic waves generated by a speaker on the left, which are measured with a microphone mounted on a horizontal translational stage on the right.
