Optical efficiency is very small and incorrect results


Dear Lumerical Team,

Kindly, I want to ask about a problem that faced me in Lumerical FDTD.
I tried to work on this paper (attached paper) and the results is incorrect (efficiency is very small), but i cannot find the error.
Can you help me in this, please?
Program files are attached.


Si with Au.fsp (272.7 KB)
Si without Au.fsp (272.2 KB)



Could you specify in detail what structure and what figures are you going to replicate.
It is extremely time-consuming figuring out the problem by carefully reading the whole article.

From my superficial view, you model a periodic array of silicon rectangles with graphene and nanoparticles on it, which can not be the case considered in the article.