Waveguide crossings
n
b
= 1.45,
n
g
= 3.4,
h
= 0.2 µm,
vacuum wavelength 1.55 µm, TE polarization,
x
,
z
in [-3, 3] µm,
M
x
=
M
z
= 120.
Dependence of the transmission on the width of the vertical core