Figure 7
From: Molding acoustic, electromagnetic and water waves with a single cloak
Experimental results for microwaves at four representative frequencies within the cloaking interval [2.6,6]GHz.
The normalized modulus (upper panel) of the magnetic field is measured along the median passing through the center of the cloak as in Fig. 4 for the source at 2.6, 3, 5.475 and 6 GHz. One notes that the magnetic field intensity is reduced by up to 30 dB at the center of the cloak (whose inner and outer boundaries are marked by the solid and dashed vertical lines respectively). Protection is clearly more pronounced at 2.6 GHz than 6 GHz. Only invisibility is achieved for the latter frequency.
