Re: How can I define the lattice structure?

Square holes are no problem - you just use MPB's built in "block" object 
type instead of cylinders.  For other polygonal shapes I usually employ a 
set of overlapping blocks.  (Or, especially for weird curved shapes, you 
could use the material-function type with an arbitrary user-specified 
dielectric function, although this is slower than using blocks for 
polygonal shapes.)

On Wed, 27 Dec 2006, Nils Jensen wrote:
>    I want to calculate the band diagram and waveguide of the photonic 
> crystal slabs with noncircular holes (square holes, or triangular holes, 
> ...) by using MPB program. Could you let me know how can I define their 
> structure in MPB program.