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Ansys Learning Forum › Forums › Discuss Simulation › Photonics › How to add substances with Pockels effect from FDTD › Reply To: How to add substances with Pockels effect from FDTD

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