Thanks Mr Newman.
Based upon your reply, I split the work into two parts. Firstly I want to correct the source and TFSF. Later I will work on power and reflectance.
1. Basically we add a point source using input plane. We can control the injection point, beam width and strength corresponding to various positions in layout using the options center, width and rectangular/ gaussian respectively. It worked pretty well. I tried with tilting option and the wave was propagating as it was expected.
2. Now the problem was updating of field in reverse direction. So I added TFSF. But it changed everything and the wave started propagating from left to right again. Also just for curiosity, I want to know that why do we need to update wavelength in TFSF tab? Should not it be considered from the same wavelength which we already entered in source tab?
3. I attached two files. (i) without TFSF (ii) with TFSF.
Please take a look over the files and help me in figuring out how to properly incorporate TFSF into the model.
Thanks