Hi! Dear all, I set different k corresponding to the same frequency, and find some phenomena I could not explain. One example is http://ab-initio.mit.edu/wiki/index.php/Meep_Tutorial/Band_diagram% 2C_resonant_modes%2C_and_transmission_in_a_holey_waveguide In the third subsection(band diagram), I set fcen=0.3175 df=0.1 k=0.4 and position the point source at (0.5,0), and achieve a guided mode which is the same as in the example. With other parameters unchanged, I set k=0.25 and get a leaky mode; I set k=0.45 and get a guided mode. The output command is (run-sources+ 400 (at-beginning output-epsilon) ) (run-until (/ 1 fcen) (at-every (/ 1 fcen 20) output-hfield-z)) Pay attention that the points (k=0.25,w=0.3175) (k=0.45, w=0.3175) are not in the band curve. Before the simulation, I have thought those points should not correspond to a leaky/guided/extended mode. Then what is wrong about my view?
Eager for your reply! Thank you very much! Maggie _______________________________________________ meep-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
