Hi! There are several mistakes in your ctl file:
- at 'make source' change (width 6) by (fwidth df) - the source is outside the lattice: center on x is at 'absolute-flux-position+1=10', but the size of lattice is 'width_x=7'. With source at center (0 0 0) one obtains a non-black png file. - pml on Z direction ( I don't know if thickness 0 is correct)
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