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Ansys Learning Forum › Forums › Discuss Simulation › Photonics › Farfield simulation and monitors › Reply To: Farfield simulation and monitors

May 8, 2024 at 5:11 pm
Guilin Sun
Ansys Employee

In such case, the side monitors can touch the upper layer in order to pick up radiation close to 90 deg, as one point interpolation does not introduce significant interpolation error. No need to use 6 monitors.

However, the box monitors can only receive the radiation with the max angle of atan(half-FDTD-x-span/distance_from_dipole_to_upper_surface), as larger than this angle is absorbed by the side PML. If you calcualte that this angle is larger than the total reflection angle, then it should works since it is thin-film type without nanoparticles .

Please do some calculation and confirm the simulaiton spans are wide enough. It may need more memory but we cannot get good result if not all the physics is included in simulation.

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