legume.GuidedModeExp.rad_coup

GuidedModeExp.rad_coup

Coupling to TE and TM radiative modes in the claddings. The dictionary has four keys: 'l_te', 'l_tm', 'u_te', 'u_tm', denoting cladding (l/u) and polarization (te/tm, or S/P). Each of these is a list of lists in which the first dimension corresponds to the k-point index and the second dimension corresponds to the mode index. Finally, the elements are numpy arrays with length equal to all the allowed diffraction orders. The corresponding reciprocal lattice vectors are stored in GuidedModeExp.rad_gvec.