Alejandro, you want to make sure you're normalizing to the correct value of 'a'. If you want lambda to be 6e-6 and a=1e-5, the corresponding normalized frequency should be a/lambda = 1.66.
As for resolution, the value you set is the number of grid points that 'a' will be divided into: so a value of res=6.66 means a grid point every a/6.66= 1.5e-6...I think your cell size is correct. -ck On Mon, Oct 18, 2010 at 11:00 AM, <[email protected]>wrote: > Send meep-discuss mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of meep-discuss digest..." > > > Today's Topics: > > 1. Very lost with Meep Units (Alejandro Escu?n El?cegui) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 18 Oct 2010 17:45:22 +0200 > From: Alejandro Escu?n El?cegui > <[email protected]> > Subject: [Meep-discuss] Very lost with Meep Units > To: <[email protected]> > Message-ID: <[email protected]> > Content-Type: text/plain; charset="iso-8859-1" > > > Hello Everybody, > > I'm researcher working about computacional electromagnetic and I am probing > Meep to watch the behaviour of the software, but I don't understand very > well the Unit in Meep. > > I think that I understand the meaning of 'a' and 'c', but I don't know if I > am using it well. For example, if I want to simulate a perfect cube with the > following characteristics: > > - side = 150um > - source = continuous => Sine wave > - frequency = 15 e13 > - lambda = 6 e-6 > > > Since my lambda is 6 e-6, I take 'a'= 1 e-5, so lambda_meep=0.6, and > frequency is 1/lambda. With this value, if the size of my stucture is 150um, > the size is 15 a's = 15*(1 e-5) = 150 e-6. Have I got any error? > > Moreover, I want a total of 100 Yee lattice, so I have to set the > resolution to 6.666. Explication: 15*resolution = 100 cells, so resolution = > 100/15, no? > > I'm a bit lost, please, I need your help. > > Thank you very much. > > Alejandro Escu?n > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://ab-initio.mit.edu/pipermail/meep-discuss/attachments/20101018/3b84b1af/attachment.html > > > > ------------------------------ > > _______________________________________________ > meep-discuss mailing list > [email protected] > http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss > > End of meep-discuss Digest, Vol 56, Issue 17 > ******************************************** >
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