lam0 1550[nm] wavelength
f0 c_const/lam0 frequency
n_core 3.47 "index of Silicon"
n_clad 1.44 "index of Silicon Dioxide"
Ltaper 2[um] "taper length"
wg1_width 300[nm] "1st wg width"
wg2_width 2[um] "2nd wg width"
wg_length 2[um] "waveguide straight lengths"
domain_x 2*wg_length+Ltaper "domain size in x"
domain_y 5*wg2_width "domain size in y"
