Reflection and transmission with TFSF source

How can I obtain reflection and transmission using TFSF source? Where the monitors must be placed?
Also what boundary conditions are required when using a TFSF source?

Dear @mohini.nagpal1

They need to be positioned inside TFSF region. Monitors that are located outside TFSF source will capture only the scattered light.

Boundary conditions are set to PML and you can take benefit of symmetry as well. There are cases that you can use periodic BCs. For more information regarding the correct usage of TFSF source, please refer to the links below: