Hello Iztok Which version of meep do you use ? these variables for an anisotropic material has been added to meep from its 1.0 version. please read this link : http://ab-initio.mit.edu/wiki/index.php/Meep_release_notes
sincerely yours Mehdi On Thu, Dec 16, 2010 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. epsilon-diag: unbound variable error (Iztok Bajc) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 15 Dec 2010 19:44:03 +0100 (CET) > From: "Iztok Bajc" <[email protected]> > Subject: [Meep-discuss] epsilon-diag: unbound variable error > To: [email protected] > Message-ID: > <[email protected]> > Content-Type: text/plain;charset=utf-8 > > Dear Prof. Johnson and all, > > I've changed the code of the tutorial example ring.ctl in order to have a > resonator made of anisotropic material, but I always get: > > ERROR: Unbound variable: epsilon-diag > > I really don't know what is wrong. My meep version is "1.6.8", so it > should be definitely new enough to support this utility. > I checked the manual and mailing list and found some related mails, but > nothing that could clear up (I hope I didn't make a trivial mistake). > > Thanks in advance for any help or suggestion. > > Best regards, > Iztok Bajc > > > ; Calculating 2d ring-resonator modes, from the Meep tutorial - adapted. > (define-param w 1) ; width of waveguide > (define-param r 1) ; inner radius of ring > (define-param pad 4) ; padding between waveguide and edge of PML > (define-param dpml 2) ; thickness of PML > (define sxy (* 2 (+ r w pad dpml))) ; cell size > (set! geometry-lattice (make lattice (size sxy sxy 10))) > > ; Create a ring waveguide by two overlapping cylinders - later objects > ; take precedence over earlier objects, so we put the outer cylinder > first. ; and the inner (air) cylinder second. > (set! geometry > (make cylinder > (center 0 0 0) > (height 20) > (radius (+ r w)) > (material (make dielectric (epsilon-diag 0.5 0.4 0.5) > (epsilon-offdiag 0.3 0.5 0.6) ) ) > ) > ) > > (exit) > > > > > > ------------------------------ > > _______________________________________________ > meep-discuss mailing list > [email protected] > http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss > > End of meep-discuss Digest, Vol 58, Issue 14 > ******************************************** >
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