Finite Element Modeling of Metasurfaces with Generalized Sheet   Transition Conditions
  A modeling of metasurfaces in the finite element method (FEM) based on generalized sheet transition conditions (GSTCs) is presented. The discontinuities in electromagnetic fields across a metasurface as represented by the GSTC are modeled by assigning nodes to both sides of the metasurface. The FEM-GSTC formulation in both 1D and 2D domains is derived and implemented. The method is extended to handle more general bianistroptic metasurfaces. The formulations are validated by several illustrative examples. 
Srikumar Sandeep, Jian Ming Jin, Christophe Caloz
physics.class-ph