How to add substances with Pockels effect from FDTD

- August 14, 2024 at 5:07 am
  
  youjin na
  Subscriber
  
  I would like to add a material with nonlineal electrical properties. I would like to apply the χ 2 value that affects the Pockels effect, can this be realized through the code in FDTD? I would appreciate it if you could show me the example code.
- August 15, 2024 at 10:27 pm
  
  Kyle
  Ansys Employee
  
  There is a Chi2 material built-in to FDTD, however this is not used for simulating the Pockels effect since we can't create a DC field in FDTD. Instead, you can calculate the static E fields, calculate the refractive index as a function of position based on the E field, then import this index data into FDTD to do your simulation. You can use the spatial (n,k) material object for this:
  Spatial (n,k) data - Simulation object – Ansys Optics
  There is an example of a similar workflow here, for FEEM instead of FDTD:
  Thin Film Lithium Niobate Electro-Optic Phase Modulator – Ansys Optics