2018-03-15T18:47:36Z (GMT) by
The refractive solution, with smoothing, to the coupling an incident to a scattered beam. The beam is incident from the lower left at an angle of 45 degrees and scattered to the lower right at an angle of 60 degrees. The upper left panel is the real part of the incident/non-adjoint electric field, the upper right panel is the real part of the scattered/adjoint field, the lower left is the final permittivity of the medium. the lower right panel shows both field magnitudes, the red channel being the non-adjoint field and the green channel being the adjoint field.