Achieving multifrequency transparency with cylindrical plasmonic Cloak

In this work, we have theoretically investigated the possibility to achieve multifrequency transparency and cloaking for a cylindrical object by employing a multilayered plasmonic shell. The frequency dispersion of plasmonic material and the size effect of the cylindrical object have been considered. The analytical transparency condition in the quasistatic case has not only been given, an exact numerical calculation based on the Mie scattering theory has also been performed. Our results show that the multifrequency transparency and cloaking for any dielectric or metal cylinder can always be realized by a suitable adjustment of the structure parameter, permittivity, and permeability of the multilayered shell. Such a transparency is not only for a certain polarized wave, it can also be realized for both polarizations of electromagnetic wave at the same time.