It is the cosimulated result by CHARGE/MQW for the obsorption. Currently MQW is 1D so it might have simplified somethng.
In some cases the material properties have to be well matached but it might be difficult to obtain them accurately. This might cause some issues. Here is the introduction for MQW physics: https://optics.ansys.com/hc/en-us/articles/4408088112915-MQW-Solver-Physics
You are navigating away from the AIS Discovery experience