Reply To: Source to model light extraction from an omnidirectional LED

[Guilin Sun]

If your LED is layered, thin-file type, I would suggest to use stackdipole: 

stackdipole - Script command

FDTD vs stackdipole - halfspace emission in a multilayer stack

Usually it uses dipole source for simulation, and average the results with 2 or 3 dipole sources separately, depending on if the LED has symmetry.

Please refer to this example  Micro-LED