Hi Steven, hi everyone,
When I run
(run-sources+ 300
(after-sources
(harminv Hz (vector3 0 0 0) fcen df)))
harminv often returns negative Q values.
I have a few questions about harminv and the values returned by harminv.
If I got it right, in the thread about negative Q values you say that
the error bar returned by meep should be much smaller than the decay
rate to obtain a trustable and positive Q value.
Is the decay rate identic to the imag. freq. returned by harminv?
When I looked for the interpretation of the error given by harminv on
the harminv man page there is written that the error is a "crude
estimate of the relative error in the complex frequency" and that this
value should just be as small as possible. I didn't find any value for
the error in relation to the imag. freqency.
Could you tell me more about this error parameter and the trustability
of Q values returned by harminv, please.
Can I improve the results of Q when I choose different fcen and df for
the source and harminv?
Thanks for your efforts.
Best regards,
Christine
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