Dear Steven, and meep users,
I want to calculate the band structure of 2D periodical cylinders. The
cylinders only have dispersive Mu. I find there are many flat bands which are
not exist in the results calculated by multiple scattering method. Although I
change the frequency bandwidth, the resolution, the time step, the results have
no change. Can someone tell me what happens? The ctl file for calculation is
attached. Thanks in advance!
(define-param r 0.2)
(set! resolution 80)
(set! geometry-lattice (make lattice (size 1 1 no-size)))
(set! geometry (list (make cylinder (center 0 0) (radius r) (height infinity)
(material (make medium (mu 1.0) (H-polarizations (make polarizability (omega
1.0e-10) (gamma (* (/ 1 3) 1e-13)) (sigma 1e20) )) )))))
(define-param fcen 1)
(define-param df 1.8)
(set! sources (list (make source (src (make gaussian-src (frequency fcen)
(fwidth df))) (component Ez) (center 0.1 0.11))))
(define-param k-interp 50)
(run-k-points 600 (interpolate k-interp (list (vector3 0 0) (vector3 0.5 0))))
Best Regards!
Huang
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