A problem in Lumerical -- how to define a quantum well's materials and features

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Pooya
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Hi
I've started the simulation of a vcsel structure with lumerical software. I've got a problem in solution mode
I don't know how i can define the quantum wells materials and features for the software ..
Let me give you an example of its structure :
450px-Real_vcsel.svg.png

As the example says i have to use 7 layers in its active region.
In Lumerical we have different materials such as [r,k] , Lorentz , dielectrics and so on..
With which materials can i define the quantum wells ?
 

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