you may find the parameteres you need in this book : Palik, Handbook of Optical Constants, Vol.1 (AP, 1985)(ISBN 0125444206) I found some constants for GaAs in this book . On Tue, Feb 15, 2011 at 8:30 PM, <[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. polarization in 2D and polarizabilities (Stefan) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 15 Feb 2011 15:18:00 +0100 > From: Stefan <[email protected]> > Subject: [Meep-discuss] polarization in 2D and polarizabilities > To: [email protected] > Message-ID: <[email protected]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Dear Meep-users, > I hope you can help me with two questions: > 1) When I fit experimental data of the dielectric function with the > formula given in Materials in Meep, so find the polarizabilities, it > seems to me that the solution is not really unique. I guess there are > also unphysical sets of parameters which model the dielectric function > correctly. Will the results I get from my simulations in Meep be the > same and correct for all of these sets of polarizability parameters or > do I have to find a certain physically correct one? If yes, how do I > find this specific set? > 2) I can't manage to make a Ex source work in a 2D simulation. When I > run the simulation with my source code for Ez everything works fine, if > I replace the field by Ex, it doesn't work. Same with Ey. I am making > the fields visible using h5topng. What is my error? The source code is: > > (set! sources (list (make source (src (make gaussian-src (frequency > 1.33333333) (width 1.06060606))) (component Ex) (center 0 0.2) (size 0 > 0)))) > > ;define the calculation space > (set! geometry-lattice > (make lattice > (size 0.5 0.5 no-size) > ) > ) > > ;define materials > (define Al2O3 > (make dielectric > (epsilon 8.5) > ) > ) > > > (set! geometry > (list > > (make block (center 0 -0.2) (size 0.1 0.1 infinity) (material > Al2O3)) ; Al2O3 substrate > ) > ) > > > (set! pml-layers (list (make pml (thickness 0.01)))) > > (set! resolution 1000) > ;(set! Courant 0.5) > (use-output-directory "/scratch/skapser/polarisations/") > ;(use-output-directory > > "/home/stud/skapser/Desktop/meep/a1um/custom-src-laser-and-structure-polarisation/") > (run-until 5 > (at-beginning output-epsilon) > (to-appended "ex" (at-every 0.5 output-efield-x)) > ) > > Thanks a lot! > Stefan > > > > ------------------------------ > > _______________________________________________ > meep-discuss mailing list > [email protected] > http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss > > End of meep-discuss Digest, Vol 60, Issue 15 > ******************************************** >
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