Traditionally, active metasurface researches have primarily focused on changing the dielectric constant and permeability of the substrate, which frequently results in resonance effect and ohmic loss.

Function and configuration of the stacked reconfigurable metasurface. (a) A potential application scenario of the proposed metasurface. (b) Schematic and functional diagram of the stacked metasurface.

Steering committee: Prasad Iyer (right) and Igal Brener with some of the optical equipment they used for beam steering experiments at Sandia National Laboratory. (Courtesy: Craig Fritz/Sandia National ...