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Ansys Learning Forum › Forums › Discuss Simulation › Photonics › How to understand the loss in MODE Eigensolver analysis mode list › Reply To: How to understand the loss in MODE Eigensolver analysis mode list

December 4, 2024 at 6:26 pm
Amrita Pati
Ansys Employee

Hi Leroy,

I think the simplest reason could be that material you are using in your simulation is lossless, however the material could have an imaginary part of the refractive index in reality, contributing to the material absorption/propagation loss. We always recommend checking the "Material Explorer" before running the simulation to make sure that correct values of the real and the imaginary part of permittivity/index are being used by FDE.

We also recommend performing convergence testing to cnfirm the accuracy of different results including the losses. But I will recommend checking the material properties first and then we can talk about convergence testing.

Regards,
Amrita