Implementing a 2D surface geometric object

[Nikolaos-Matthaiakakis]

I would like to try and create a 2D surface geometric object for the object geometries library of MEEP as well as a function that offers the ability to define the optical properties for the surface object directly through the surface conductivity of the desired material (e.g. 2D materials).

In more detail I would like to implement the surface object as a charged surface boundary condition that applies to a fraction of the Yee cells with the form of
n x (¹H-²H) =σ_2DE

where n the unit vector normal to the 2D surface, ¹H and ²H the magnetic fields in each side of the 2D surface, σ_2D the 2D conductivity, and E the tangent electric field
(see "Modeling Graphene in the Finite-Difference Time-Domain Method Using a Surface Boundary Condition" and "BCC-Grid versus SC-Grid in the modeling of a sheet of graphene as a surface boundary condition in the context of ADE-FDTD")

This method could be extremely useful for combining 2D materials with large meta-material geometries without extreme space and time discretization (few minute simulations instead of hours).

The biggest challenge is that I am not familiar with the inner code of meep and what this would demand to properly work with meep without messing things up (especially regarding how the Yee grid is handled).

I suppose that this would require

1. a UI function for calling the geometry
2. a function that handles the geometric design
3. a UI function for calling 2D conductivity
4. the function that sets the 2D conductivity
5. other functions related to the meep code that I have not currently considered.

I would be happy if some advice could be provided by more experienced users or developers.

Thank you for your time.