Reply To: How to Simulate a Non-Circular Ring Modulator Structure

[Guilin Sun]

For the non-regular ring, you may need to use several different polygons; of different number of partial rings depending on the change of the geometry.  RIng object can have a start angle and stop angle.  Or if you can draw it using other software, you can save it to an image and import it.

Doping will need to be simulated by CHARGE. Once the carrier distribution is obtained, you can import it ar charge attribute, which has some built-in carrier-index conversion mechanism: Charge distribution to change in refractive index theory – Ansys Optics

https://optics.ansys.com/hc/en-us/articles/360034901753-np-Density-and-Temperature-Index-Perturbation-Simulation-object 

The workflow is similar to the standard ring with doping. 

Please search online to find applicable examples as reference, and write a new post for each question new.