computing group velocities

Fulya Bagci <[email protected]> Wed, 27 Apr 2011 07:58:19 -0700 (PDT)
Newsgroups gmane.comp.science.photonic-bands
Message-ID <[email protected]>
Dear  MPB-users,

I have a question concerning the built-in commands (compute-group-velocities) and (compute-group-velocity-component direction). For photonic crystals and photonic crystal line-defect structures  
(run-te display-group-velocities) works fine, but for the two lower 
level functions listed above I couldn't have found a way to make them 
run. Regarding the link below, can anyone send me a sample code that pass them into a function? 

http://blog.gmane.org/gmane.comp.science.photonic-bands/month=20041201

In a triangular lattice line defect PhCW, if I want to calculate the “X” component (in cartesian) of group velocity, can I write the direction of group-velocity-component (vector3 0.866 0.866 0) ?  (cartesian->reciprocal (vector3 1 0 0)) ==>  (0.866 0.866 0)  

Thank you very much.
Regards,  

Fulya Bagci
Ankara University
Dep.of Eng.Physics

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