Hi,
Thanks for the speedy reply. The structure I'm trying to simulate is a 2D SOI
waveguide. I am interested to see how much light is reflected if I end it
abruptly in air.
I made sure my PML layer is thick enough (equal to the longest wavelength) and
I also placed the flux planes far enough from the source and scatterer (2.5 and
3.5 units respectively, longest wavelength being 1.83). I also tried using a
smaller spectrum, but I'm still getting nonsensical values.
Short of some scripting error on my part, is there anything else I can try?
Kind regards,
Minh
> Date: Tue, 5 Aug 2008 15:12:05 +0200
> From: [EMAIL PROTECTED]
> To: [EMAIL PROTECTED]
> CC: [email protected]
> Subject: Re: [Meep-discuss] Reflection calculation
>
>
>
>
> Start off by making sure your flux planes are at least a wavelength (the
> longest one) away from the source plane or PML. Also make sure that
> the flux planes are a wavelength away from the scatterer.
>
> Make sure your PML is thick enough (one wavelength is safe).
>
> If your structure is very resonant, it can trap energy and lead to
> strange scattering values as well. Make sure you let the simulation run
> long enough by using the stop-when-fields-decayed feature. It may also
> help to use a more narrowband excitation.
>
> Hopefully that corrects it for you. If the simulation time becomes too
> long, you can try to gradually reduce all of those distances until the
> point where those errors become significant.
>
> Best,
> Matt
>
>
>
>
> On Tue, 5 Aug 2008, Minh Nguyen Huu wrote:
>
> >
> > Hi,
> >
> > I've ran into a strange problem when trying to calculate the
> > reflection spectrum of the structure I'm trying to simulate. What I
> > find is that for some frequencies the calculated values (after the
> > second run with the reflector) are positive. The script I made is just
> > a modified version of the script found on the website. If anybody ever
> > ran into this problem or can direct me to an email where this problem
> > has already been discussed, I would be very grateful.
> >
> > Kind regards,
> >
> > Minh
> > _________________________________________________________________
> > Jouw nieuws en entertainment, vind je op MSN.nl!
> > http://nl.msn.com/
_________________________________________________________________
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