Reply To: RCWA results are quite different from FDTD

[guodong.zhu]

Hi Amrita,

Thank you for the comments.

I tried the tangent vector field with 3000 k vector (it ran almost 24 hours). The results improved but still displayed significant differences when compared to the FDTD simulation results

Below is the comparison:

I also compare the results with or without checking tangent field vector for 1000 k vectors.

Here is the field distribution (xy cut) at the center of my structure for the wavelength at the peak. Gold structure is at the center.

RCWA:

FDTD:

 

Here is my RCWA solver settings:

Do you have any furthure suggestions? I am still runing simulation with 4000 k vectors. However, it might take a very long  time.

 

Regards,

Guodong