Figure 10.
Cloaking in square arrays of SRRs with four holes: a source at frequency Ω=2.8, located in the centre of a square metamaterial consisting of 64 SRRs shaped as in figure 5b produces a wave pattern reminiscent of (a) concentric spherical field, (b) cloaking of a rectangular inclusion inside a slab of a metamaterial consisting of 38 SRRs and (c) scattering of a plane wave from the same rectangular hole as the previous panel. (d) Zoom in dispersion diagram of figure 5b. (e–g) Present isofrequency plots of the lower, middle and upper modes of the Dirac point, respectively.