153086.fig.008a
(a)
153086.fig.008b
(b)
153086.fig.008c
(c)
153086.fig.008d
(d)
Figure 8: Electric field distributions in the vicinity of the reciprocal cloak without perturbation (a), with negative perturbation while transverse parameters are invariant (b), impedances are invariant (c), and refraction index is invariant (d).