Dear Kan, You can still consider your waveguide as an infinite repetition of unit-cells/slices, even although you don't see any periodic variation. I believe this is called translational symmetry (see "Molding the flow of light, chap 3, page 30). So you can still use this technique to obtain a band-diagram of your waveguide. Just do as the manual tells you, and set k-point as true etc.
Best regards, Milan From: [email protected] [mailto:[email protected]] On Behalf Of Dayan Handapangoda Sent: donderdag 30 december 2010 11:54 To: [email protected] Subject: [Meep-discuss] How to use the k-point parameter Dear Meep users, I recently started using Meep, and have some doubts regarding using the parameter k-point. I want to obtain the dispersion curve of a infinitely-long cylindrical metallic nanowire using Meep. In Meep tutorial, I read that the method of obtaining a band diagram is by specifying the wave vectors k, and then running harminv to obtain the frequencies corresponding to them. From Meep reference, I got the idea that k-point should be set to 'false' for non-periodic structures, and 'vector3' for periodic structures. In my case, as the infinitely long nanowire is not a periodic structure, should I use k-point as false (which is the default)? If yes, since I cannot specify any values for k-points, how can I proceed to obtain the dispersion data? Thanks! Kan
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