Figure 5
From: Molding acoustic, electromagnetic and water waves with a single cloak
Experimental results in backward and forward scattering for microwaves.
The normalized modulus (upper panel) and the normalized real part (middle panel) of the magnetic field is measured within the rectangular domain shown in lower panel. The frequency of the source is 3.550 GHz. One notes that the magnetic field intensity is reduced by 18 dB at the center of the cloak with a reduction varying in the range [13.5,38]dB inside the inner disc. The field is enhanced inside the corona and both wavefront and field amplitude are nicely reconstructed behind the cloak. Notably the measured intensity is −11 dB and −1 dB at the left and right sides of the panel, respectively. See also Figure 5 for the profile of the field along the median passing through the center of the cloak. The square metallic obstacle inside the invisibility region is both invisible and protected from microwaves. Similar results hold in the cloaking interval [2.6,6]GHz, see Figs. 7&8.
