Digtial Metasurface with Simultaneous EM Absorption and Scattering

The absorption and scattering behaviors are two fundamental concerns for artificial metamaterials (MMs) toward a variety of applications like radar, antennas, stealth, wireless communication, etc. Here we propose a metasurface with dynamical control the absorption and scattering performance simultaneously in a broad bandwidth. By changing the bias voltage of the PIN diodes embedded in the meta-atoms, different absorption and scattering characteristics can be invoked as a result, giving rise to a pair of operation modes for the metasurface: One is the scattering mode, where the scattering features can be manipulated in a predefined manner, and the other is the absorption mode, where the incident waves can be efficiently dissipated at the surface. The simulation results demonstrate the validity of our design.