> Try taking your structure and following this tutorial (perhaps focusing on > the final section, "Band Diagram"): > http://ab-initio.mit.edu/wiki/index.php/Meep_Tutorial/Band_diagram,_resonant_modes,_and_transmission_in_a_holey_waveguide > > You can take the PML off of the left and right sidewalls with something > like: > > (set! pml-layers (list (make pml (direction Y) (thickness dpml)))) > > > Best, > Judson > > > On Wed, Jun 29, 2011 at 2:30 PM, <[email protected]> wrote: > >> Hello, Everyone, >> >> I want to use MEEP to do a FDTD analyse for a PBG Waveguide. the >> Structure >> is something look like this: >> ooooooo >> ooooooo >> ooooooo >> ooooooo >> xxxxxxx >> xxxxxxx .... >> xxxxxxx >> ooooooo >> ooooooo >> ooooooo >> ooooooo >> in the structure "o" and "x" are all airholes, only with different >> radius. >> I made the PML around the cell, and swept the frequency. the simulation >> ran just without end. i thought that was a resonance. But what i dont >> understand is, with PML all around, why wouldnt the energy total >> absorbed? >> Could someone help me with this, or give me some advices how to set the >> boundaries? >> >> Best wishes >> Dudu Zhang >> >> >> _______________________________________________ >> meep-discuss mailing list >> [email protected] >> http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss >> >> > thank you very much for your advise. i know that it is a problem of the PML while simulating the photonic crytstal. i tried increasing the thickness of the PML. It helped but not good enough. i want to try to define a smooth discontinuity from the boundary between pml and cell. but i dont know how to define the pml-profile rightly. i used: (set! pml-layers (list (make pml (thickness 20.0)) (pml-profile (lambda (u) (* u u u))))) because i saw in the Meep Reference man can change the pml profile by using (pml-profile (lambda (u) (* u u u))), but it didnt work. Could you help me this?
p.s. I dont know why i cant use "Search"-function in GMANE now. _______________________________________________ meep-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
