I am solving a nonlinear optics problem. I have a solution set for a parametric sweep from 900nm to 1500nm with a step of 5[nm]. This solution is obtained at "epsilon= eps0"  for a material in my model.  Now i want to define "epsilon= eps0+normE" and run the parametric sweep for the same range at same interval. While running for the wavelength of 900nm, normE should be from the earlier simulation value at 900nm. similarly for 905 nm, normE should be from the earlier simulation value at 905nm..and so on till 1500nm. So how do i call this in my study node.

Thanks in advance for support.