I would like to simulate a pump-probe experiment with two different light sources. Initially I thought this was a breeze in HFSS.

However, I am not sure on how to go about the simulation since the probe should be in a lower frequency, around 10-30 THz, while the pump at ~300 THz.

Currently I'm using the Driven Modal solution type, which specifies the frequency for the whole simulation. I've been looking around but I haven't found a specific solution or example that addresses this types of simulations.

I was thinking of frequency sweeps, but I'd like one of the sources to be constant in one of these frequency sweeps. And again, I need two different frequencies hitting the material/sample at the same time.

Is there any possible way of doing this?

Alternatively, should I do a band-pass filter work so that it would output a certain frequency (i.e. create a band pass filter next to the model?) Will the component be able to, say, input a single frequency and convert it to the another frequency?

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