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simulation of nonlinear material
Posted Aug 16, 2012, 1:32 p.m. EDT RF & Microwave Engineering Version 4.2a 1 Reply
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Hi all,
I'm doing a time harmonic (not transient) simulation of a nonlinear structure in RF 4.2a . the property (like refractive index) of the material varies with light intensity. I have two questions:
1. How to model the effect of the nonlinearity. I set the material property such as refractive index as a function of light intensity. It seems to work but I'm not sure if it is reasonable.
2. When the nonlinear effect becomes large the solution often cannot converge. How to handle this problem? I have used the direct solver.
Thanks!
I'm doing a time harmonic (not transient) simulation of a nonlinear structure in RF 4.2a . the property (like refractive index) of the material varies with light intensity. I have two questions:
1. How to model the effect of the nonlinearity. I set the material property such as refractive index as a function of light intensity. It seems to work but I'm not sure if it is reasonable.
2. When the nonlinear effect becomes large the solution often cannot converge. How to handle this problem? I have used the direct solver.
Thanks!
1 Reply Last Post Aug 24, 2012, 9:42 p.m. EDT
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Posted:
1 decade ago
This is an interesting question. Any non-linear response that could result in modifying the waveform (at anywhere at all in the computation space) away from a purely-sinusoid waveform should not work properly in a frequency-domain (i.e., single-frequency) model, since such a waveform naturally includes more than a single frequency. I'm guessing that that may be the cause of your problem, but I encourage others to respond also.