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Ansys Learning Forum › Forums › Discuss Simulation › Photonics › PML vs metal boundary condition gives different value of the propagation loss › Reply To: PML vs metal boundary condition gives different value of the propagation loss

March 23, 2023 at 6:09 pm
Guilin Sun
Ansys Employee

This might be a back propagation mode, which can have negative real (neff). You can check this:

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