Scattering characteristics of a metasurface-covered metamaterial circular cylinder buried below a flat interface

Abstract The scattering characteristics of a metasurface-covered metamaterial circular cylinder which is buried below a flat interface has been studied under transverse magnetic and transverse electric incident field excitations. A spectral plane-wave representation of fields has been used to study the multiple interactions between the considered circular cylinder and the flat interface, along with the application of the double-sided impedance boundary conditions at the cylindrical object interface. The considered metamaterial circular cylinders are assumed to be made of epsilon-negative, mu-negative, double-negative, epsilon-near-zero, mu-near-zero, and double-near-zero metamaterials. It is shown that by varying the metasurface surface reactance, one can enhance or diminish the scattering width as compared to the respective scattering width of the considered metamaterial buried circular cylinders without a metasurface. Such types of enhanced and diminished scattering can be used in the design of microwave or optical detection and stealth systems. It is also shown that the buried metasurface-covered epsilon-negative and epsilon-near-zero metamaterial circular cylinders of the same size but with different values of metasurface capacitive reactance have the same backscattering characteristics under the incident transverse magnetic polarization and find applications in electromagnetic or optical illusions.