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Ansys Learning Forum › Forums › Discuss Simulation › Photonics › Problem with the plateau region for f3dB bandwidth measurement › Reply To: Problem with the plateau region for f3dB bandwidth measurement

May 6, 2024 at 5:24 pm
Guilin Sun
Ansys Employee

I believe this is physical, as you can see even at small power, there is a kink at higher frequecy. when the power is small, the device works at the linear I-V relation. When the power is large other physics is involved. 

To improve, please check if the material properties are properly set and all the physics are considered.