Using carefully arranged electric and magnetic components, we have recently demonstrated that backscattering from otherwise arbitrarily shaped two- and three-dimensional structures can be fully eliminated. Here, first we investigate the possibility of creating self-dual microwave absorbers that may provide advantages compared to typical commercial magnetoelectric absorbers. Next, we demonstrate that the self-duality condition is not limited to homogenous structures and may be extended to effective material properties, opening the door to realistic implementation of these structures at microwave and optical frequencies.
Nasim Mohammadi Estakhri, "Self-dual systems for backscattering cancellation," Proc. SPIE 12647, Active Photonic Platforms (APP) 2023, 126470K (4 October 2023); https://doi.org/10.1117/12.2677178