Waveguide crossings

the computational domain
nb = 1.45, ng = 3.4, h = 0.2 µm,
vacuum wavelength 1.55 µm, TE polarization,
x, z in [-3, 3] µm, Mx = Mz = 120.

Dependence of the transmission on the width of the vertical core

power versus width of vertical core v = 0.218 µm v = 0.374 µm v = 0.591 µm v = 0.823 µm