Learning Forum

[youjin na]

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.

[Kyle]

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