Blazed grating optimization in Lumerical

- May 23, 2023 at 4:05 pm
  
  Dmytro Fedin
  Subscriber
  
  Hello All,
  Ansys Optics Support team has presented the showcase example (https://optics.ansys.com/hc/en-us/articles/360041613174-Blazed-grating) which describes the blazed diffraction grating in Lumerical. The example is very helpful but I got some questions:
  - How can I optimize blazed grating to achieve high diffraction efficiency?
  - Could I include to the optimization function the variable parameters like blazed angle, height of groove profile or line density?
  I found only one example using a parametric sweep (
  ) but I believe that Lumerical has a more powerful tool to provide a complicated optimization process.
  I would be grateful for any help!
- May 24, 2023 at 9:37 pm
  
  Guilin Sun
  Ansys Employee
  
  Lumerical has a built-in optimization based on particle-swarm method, and if you have API license you can use either Matlab or Python optimization.
  In this example https://optics.ansys.com/hc/en-us/articles/360041613174-Blazed-grating the blaze grating is script with theta, and period. You can modify it, or use your own math to modify the script to create the desired grating. Please try.

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