On Fri, 17 Nov 2006, Sung Park LEE wrote:
I thank you very much for your suggestion. 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 surround the defect is 3. In my calculation, the radius of the defect hole is kept at r (radius of air holes), whereas its refractive index is varied (n1). After making this structure, I have some MEEP commands (by modifying some commands in MEEP Tutorial - Band diagram, resonant modes, ...) to study the Q, and resonant point defect modes. In this structure, I consider the TE-like modes (Hz is along the z axis). I don't know how the source is inside the cavity to study the Q, and resonant modes. Please help me!
Depending upon whether you increase or decrease the refractive index of the defect hole, you will get different-symmetry modes. I think I know what these symmetries are, but it is better for you to learn how to figure them out for yourself. As I explained, the correct thing is to have an *even* z=0 mirror symmetry plane and no other symmetry, and then put your Hz source in a *random* (non-symmetric) location in the z=0 plane (not at 0,0). That way you will excite the modes regardless of their symmetry. Similarly, apply harminv at a non-symmetric point (usually the same point as where you put the source).
Steven _______________________________________________ meep-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
