Bidirectional planar absorber with polarization-selective absorption and reflection capabilities

In this study, we developed a novel planar bidirectional perfect metamaterial absorber (PMA) with polarization-selective absorption and reflection capabilities. The proposed bidirectional PMA has near-perfect absorption for y- and x-polarized waves propagating in the −z and + z directions. It also reflects x- and y-polarized waves propagating in the −z and + z directions. We used full-wave simulations and Fabry–Perot cavity models to evaluate the performance of the proposed bidirectional PMA. We also used a free-space method to measure the fabricated sample. To demonstrate the potential of the proposed PMA in multiband systems, we extended our PMA design to a dual-band bidirectional absorber.