Power-flow Conformal Metasurfaces for Transmissive Beam Splitting

Omega bianisotropic metasurfaces (MSs) are invaluable for wave control. However, an impediment to their general deployment is the requirement that the power flow be locally conserved across the surface. Attempts to achieve this have included introduction of auxiliary fields in the solution, the determination of which is often nontrivial. Power-flow conformal MSs have been shown to mitigate this need by judicious deformation of the surface profile. Facilitated by our recently proposed Fabry-Perot MS platform, we provide insight herein into the validity of this concept for transmissive electromagnetic beam manipulation. As verified via full-wave simulations for asymmetric beam splitting, such configurations could readily implement nonlocal field transformations, paving the path to perfect field molding in transmission.