[MPB-Discuss] How to identify the fundamental mode of photonic crystal fiber

Hi,

I am trying to optimize a photonic crystal fiber design with MPB --- 
Basically the fiber is the common triangular-lattice air holes on 
dielectric, with large center air core as wave tunnel. Can anybody give 
some advice on how to find a good fundamental mode of the fiber? Right now 
what I do is to sweep k_z and calculate bands around the band-gap 
frequency, then calculate the energy portion within the center air core 
for each band above the light line(so that is propagating mode), and then 
pick up the best one with the largest energy ratio in the core. However, 
it is very tedious. Wondering if there is a better way to locate the 
fundamental mode in MPB?

Thanks a ton!

Ziran


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Ziran Wu
Millimeter Wave Circuits and Antennas Laboratory
Department of Electrical and Computer Engineering
University of Arizona

(520)621-6099
http://www.ece.arizona.edu/~mwca