Hi, I have some doubt in the MPB file tri-rod.ctl (reproduced here) ,a program for triangular lattice.
(set! num-bands 8) (set! geometry-lattice (make lattice (size 1 1 no-size) (basis1 (/ (sqrt 3) 2) 0.5) (basis2 (/ (sqrt 3) 2) -0.5))) (set! geometry (list (make cylinder (center 0 0 0) (radius 0.2) (height infinity) (material (make dielectric (epsilon 12)))))) (set! k-points (list (vector3 0 0 0) ; Gamma (vector3 0 0.5 0) ; M (vector3 (/ -3) (/ 3) 0) ; K (vector3 0 0 0))) ; Gamma *Why basis1 is not defined as basis1 ( 0.5 (/ (sqrt 3) 2)) and basis2 as basis2 ( 0.5 (/ (sqrt 3) -2)) if we refer the fig(enclosed here) from the books" Photonic Crystal--Modelling the flow of light"?? * *and while defining the k points also with the reciprocal lattice vector, why it is not * * vector3 0 0 0) ; Gamma* * (vector3 0 0.5 0) ; M (vector3 0.5 0.5 0) ; K (vector3 0 0 0))) ; Gamma* *since M point is half of b1, K point is half of b1 plus half of b2.*
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