Dear Steven and Meep users,

I wanna simulate the transmission of a nonlinear periodic geometry. However, I 
still have several questions after reading the meep-discuss archives. My 
questions are as follows:

1. In the Meep Manual, Steven suggested that we should monitor the power going 
through the linear system, then change the current amplitude to get the 
expected power. However, there are two kinds of power, which are the time 
instant power and time-average power. Which power should I monitor? If I use 
time-average power, I have to use the complex-valued fields, which are 
problematic for nonlinear systems.

2. How can I get a nonlinear transmission curves? I think we can not obtain 
them as in the linear system by Fourier transform, because the amplitude of 
the Gaussian pulse is different in different frequencies. Therefore, we should 
use plane wave with same power, and do many simulations for different 
frequencies. Is that right? In this case, should the plane wave be on in all 
the simulated time? Are there other methods or similar ctl files to simulate 
the nonlinear transmission curves? 

Thanks a lot. Any comments will be appreciated. 

Best,
Chen



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