On Wed, 22 Nov 2006, Sung Park LEE wrote:
Now, I have a trouble: My structure is PC slab (refractive index: n, slab thickness: h) with triangular lattice of air holes. Point defect cavity is formed in the center of the structure. The number of layers of air holes that sourround the defect is 5. In my calculation, I study resonant frequencies vs. the nearest-neighbor circular air-hole radius (r'). Simultaneously, the neighbor holes are displaced outward by the distance d. (Please, see the figure in the attached file). After making the structure, I apply the Hz source in a *random* (non-symmetric) location in the z=0 plane (not at 0,0). That way, I get the modes regardless of their symmetry (only dopole mode). (Similarly, I apply harminv at a same non-symmetric point as where I put the source). I don't understand why my results are not correct (I refer to J. Appl. Phys., Vol.92, pp. 654). Could you help me!
You don't give enough information to debug your problem. How are the results "not" correct, etc?
Some things to check: output the epsilon.h5 file, and make sure the structure looks like what you think it should be. Make sure you have enough air above and below the slab (the PML should be far enough from the slab that it does not overlap your mode profile). Output a "movie" of the field (i.e. the Hz field in the z=0 plane every period or so) and make sure it looks like what you think it should look like. Etc.
Rest assured that Meep correctly computes the resonant modes of cavities in photonic-crystal slabs (we have done this several times), so if you are not getting the right results then you have an error in how you specified the simulation.
Steven _______________________________________________ meep-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
