I'm trying to model light coupling from a waveguide into a microresonator. My first step to get acquainted with Elmer has been to go through "Using VectorHelmholtz module to model wave propagation in bent waveguide." This I've successfully done, however now I'm trying to understand the example better and modify it towards what I'm trying to do and I'm having difficulty finding some information understanding the Inport boundary condition:
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Boundary Condition 2
Target Boundaries(1) = 1
Name = "Inport"
Magnetic Boundary Load 2 = Variable Coordinate 1;Real MATC "-2*beta0*k0/kc*sin(kc*(tx+a/2))"
Electric Robin Coefficient im = $ beta0
End
Could someone explain what Magnetic Boundary Load does and what field profile across the boundary I'd expect to see? e.g. sinusoidal field for Hy(x), but the period doesn't look normalized to the width of the waveguide.
Cheers,