Reply To: How can I get this output using ansys lumerical Mode or FDTD or Charge?

[Guilin Sun]

You might need to simulate with CHARGE and INTERCONNECT.

For each thickness, you need to do CHARGE simulation with voltage sweep, and then use INTERCONNECT.

If you need to understand the overall simulation process and how to set up your system for time-domain simulations, which may include modulation depth analysis, you can refer to the "INTERCONNECT simulation methodology and tips" documentation. It provides guidance on setting the time window, number of samples, and other parameters that define the signal sampling rate used in the simulation. 

 https://optics.ansys.com/hc/en-us/articles/360036106934-INTERCONNECT-simulation-methodology-and-tips

You may  also refer to a practical example of a time-domain simulation: you can look at the "Ring modulator time domain (INTERCONNECT)" documentation. This example discusses the validation of a ring modulator model and subsequent time-domain simulation, where measurements such as the eye diagram and modulator S21 response can be retrieved. 

 https://optics.ansys.com/hc/en-us/articles/360042329094-Ring-modulator-time-domain-INTERCONNECT