Hello, I would like to check how it is possible to solve for the forces arising from thermophoresis using DEVICE?

I was looking at this paper, from Nature,

and apparently, they used Lumerical to solve for optothermal forces acting on gold nanorods suspended in water. Basically what they did was to produce a plasmonic resonance effect on the gold nanorods by shining a laser on the rods, and observe the Temperature gradients and resultant optothermal forces.

Is there a specific analysis function that enables users to perform such force analysis (similar to the analysis functions in FDTD solutions)? Or is there a way to introduce the Greenâ€™s function approach to obtain the optothermal forces?

Thank you for your help!