Carpet cloak with photonic crystal shield

In this paper, we report a carpet cloak using photonic crystal layers as an effective shield for substituting the PEC shield in the conventional carpet cloak. This carpet cloak permits communication with the outside when the frequency is out of the forbidden bandgap of the photonic crystal. The lateral shift at the reflection plane, which makes the carpet cloak detectable, is considered and calculated with a Gaussian beam illumination. In order to counteract the lateral shift, we redesign the parameters of the cloaking slab by using the method of transformation optics. Good agreement has been obtained between the adjusted carpet cloak and ideal carpet cloak with a PEC shield.