added last part for smm (unfinished)

optic.py

@@ -556,7 +556,7 @@ def em_amplitude_smm(super_lattice, wavelength):
 
         # external mode coefficients
         c_ip = np.invert(s_global[di][0][1]) @ (c_ref -s_global[i][0][0] * c_inc)
-        c_im = s_global[i][1][0] * c_inc +
+        c_im = s_global[i][1][0] * c_inc +ee
         mc_e = np.array([[c_ip],
                          [c_im]])