Peculiar and anomalous cloaking features of plasmonic materials

We present here the main features of cloaking based on plasmonic materials, together with some novel aspects of the exotic and anomalous features that such plasmonic shells may provide. In particular, in addition to scattering cancellation features, we discuss a special condition for which a suitably designed plasmonic metamaterial shell may produce an anti-resonant (very low) scattering, independently of the specific properties of the object placed inside it. Different from classic plasmonic cloaking, this condition may provide novel physical insights into the anomalous scattering properties of plasmonic shells, and it may lead to various interesting possibilities for applications.