legume.PlaneWaveExp.get_eps_xy

PlaneWaveExp.get_eps_xy(Nx=100, Ny=100, z=0)

Get the xy-plane permittivity of the layer as computed from an inverse Fourier transform with the PWE reciprocal lattice vectors.

Parameters:

• Nx (int, optional) – A grid of Nx points in the elementary cell is created.

• Ny (int, optional) – A grid of Ny points in the elementary cell is created.

• z (float, optional) – Position of the xy-plane. This doesn’t matter for the PWE, but is added for consistency with the GME definitions.

Returns:

• eps_r (np.ndarray) – The in-plane real-space permittivity.

• xgrid (np.ndarray) – The constructed grid in x.

• ygrid (np.ndarray) – The constructed grid in y.