.......................
Epsilon tensor outside the material:
[[1. 0. 0.]
[0. 1. 0.]
[0. 0. 1.]]
Slab width (bohr): 11.40454
Slab center (bohr): 5.70226
Smoothness parameter (bohr): 0.37807
Grid: 83, 83, 97
Error at -16 4
Error at -16 5
Error at -16 11
Error at -16 12
Error at -15 1
Error at -15 14
Error at -14 -1
Error at -14 15
Error at -12 -4
Error at -12 16
Error at -11 -5
Error at -11 16
.
.
.