Hi,
i found harminv only works after some step functions, not all step functions.
Harminv runs after after-sources, after-sources+ T, and after-time T.
It stopes after other step functions, for examples: at-end, at-time T.
this is very strange.
a gaussian source was used in my simulation and i need to do frequency
analysis at a point which is far away from the source. this is like one
of meep examples: modes of a ring resonator. that means a period of
time is needed for wave to propagate from source. which step function
is the best for my simualtion if i need an accurate harminv result? In
the meep manual, it is recommended the step function after-sources is
sufficient. but i found the harminv result is related with the
step-function, i.e. which time step is used for harminv.
by the way, in my simulation, the center frequency of gaussian source
is 0.35, but the harminv results gives a shifted frequency less than
0.35. why? the structure in my simulation is a square-rod photonic
crystal. does photonic crystal shift frequency?
thanks,
-- Huazhong Wang
Graduate
Department of Electrical and Computer Engineering
FAMU-FSU College of Engineering
Florida State Univerity
2525 Pottsdamer Street
Tallahassee, FL 32310
Email: [EMAIL PROTECTED]
Tel: (850) 410-6408 (office)
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