𝛳=20 (smaller than critical angle)
𝛳=45 (greater than critical angle)
We see that in case of total internal reflection no field could enter in second medium and the energy will all be kept inside the first medium.
Electric field
Power Flow
How is it implemented in CST Studio Suite?
Unitcell Boundary Condition (available in Frequency solver) enables the user with two dimensional infinite array in x and y directions in combination with Floquet ports in Zmin and Zmax directions. The desired incidence angle of the Flouqet modes can be set by user. The first two modes are the fundamental plane waves created in the direction of incidence angles.
Images below show a short summary of this procedure.
Should you have any questions, please feel free to contact me or the Simulia CST Studio Suite support team.
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