Dear MPB Users,
I have a question, it might be pretty simple though. would anyone let me
know how to find center wavelength from a 2-D Bandgap(in units of
c/a) plot? Say, i have a bandgap from 0.3~0.4 (on the scale of c/a as what
the tutorial shows...), how do i get the center wavelength for this
bandgap? And, where is the lattice parameter in the following code and what
need to do to change that lattice constant to a new value? I want to see
the spacing change with that parameter
set! geometry-lattice (make lattice (size 1 1 no-size)
(basis1 (/ (sqrt 3) 2) 0.5)
(basis2 (/ (sqrt 3) 2) -0.5)
(basis-size 1 1 1)))
(define-param kz 0) ; use non-zero kz to consider vertical propagation
(set! k-points (list (vector3 0 0 kz) ; Gamma
(vector3 0 0.5 kz) ; M
(vector3 (/ -3) (/ 3) kz) ; K
(vector3 0 0 kz))) ; Gamma
(set! k-points (interpolate 4 k-points))
(define-param eps_background 1) ; the dielectric constant of the background
is air
(set! geometry (list (make cylinder
(center 0 0 0) (radius .25) (height infinity)
(material (make dielectric (epsilon 11.5))))))
(set! resolution 32)
;(run-tm (output-at-kpoint (vector3 (/ -3) (/ 3) 0)
; fix-efield-phase output-efield-z))
(run-tm)
(run-te)
Thanks
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