Ring Resonator 3D FDTD Example

- February 20, 2023 at 9:45 pm
  
  Ahmet Durgun
  Subscriber
  
  Hello, I am trying to simulate the ring resonator FDTD example over a wider band, from 1.2 um to 1.8 um. When I run the same example over a narrower band, for instance 1.5 um to 1.6 um, I observe a significant shift in the resonant wavelengths. I suspect that this is due to the material fit model. Is there a recommended band width to get the most accurate results for broadband simulations?
- February 21, 2023 at 10:15 pm
  
  Guilin Sun
  Ansys Employee
  
  Material fitting is one thing, and it also affects the mesh size.
  Please chekc this:
  It will fix the material fitting and the mesh generation for the same wavelength range, after the source spectrum changes.
  In addition, make sure the simulaiton time is long enough and let the autoshutoff min to terminate the simulation.