On Aug 11, 2008, at 6:18 PM, Ryan Hao wrote: > Just one thing I am not sure at present: > If my computational cell is a triangular lattice like this: > + + + + + + |y > + + + + + | > + + + + + + |_______X > I incident a pulse along the X direction, and I want add > periodic boundary in Y direction. > Please note in the Y direction, the fields will decay and > will not periodically repeat (though the structure are periodically > repeat) > In this situation, how to set the k-point? > I would like set the k-point to (0 (sqrt 3) 0), but I am not > sure.
Assuming you have PML in the Y direction, the Y component of k is irrelevant because the boundary conditions are irrelevant for directions where there is PML. If I recall correctly, only your X direction does not have PML. In that case only the X component of k matters; the k component is set by what direction you want your incident wave to come from. For normal- incident light, kx=0. Steven _______________________________________________ meep-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
