Graphene layer - transition boundary condition

I am trying to analyze a waveguide with a graphene layer, using Perpendicular Waves - Hybrid Modes.
In this analysis, the graphene layer is considered as an infinitely thin conducting layer.
Thus I need to apply the transition boundary condition at the position of the graphene layer.
The problem that I am facing now is that Maxwell's equations are solved for the magnetic field.
In this case, the tangential components of the magnetic field are forced to be continuous across boundaries.
Consequently, the transition boundary condition for the graphene layer becomes like n x (E1 - E2) = n x (H x n).
I need to solve Maxwell's equations for the electric field,
and I need to use the transition boundary condition like n x (H1 - H2) = n x (E x n).
Could you let me know how to change dependent variables when using Perpendicular Waves - Hybrid Modes?
Or is there anybody who can tell me how to analyze a waveguide with a graphene layer?
Thank you.