Getting nk from R,T in Lumerical FDTD

- February 11, 2022 at 12:33 am
  
  Sara91
  Subscriber
  
  Is there a way, using Lumerical FDTD, to extract the nk of the films if I know the transmission and reflection? for example, if I have an ITO film on glass substrate, and I have experimentally measured its transmission and reflection, is there a way to include this ITO layer with the same optical properties that I have measured into my simulation?
- February 11, 2022 at 4:43 pm
  
  Guilin Sun
  Ansys Employee
  
  So you have transmission and reflection (amplitude coefficient or power ratio?) and know the structure, you want to fit the result to find the refractive index of ITO and its layer thickness, right? this is the job of ellipsometory, and the instrument should have built-in algorithm to give you ITO thickness and refractive index. Please search online to find some formula.
  On the other hand, FDTD is a deterministic algorithm, meaning it simulate the results based on device' material property and geometry. So once you have the device parameters you will be able to simulate and then compare with the measured result.
  I hope this helps.

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