In this video lesson, you will learn about how the slab mode is constructed in Lumerical varFDTD and how the 3D simulation is reduced to a 2D simulation. Key differences between the varFDTD simulation and a traditional 2D simulation will also be explained.
Lumerical varFDTD uses the effective index method to collapse the 3D geometry into a 2D representation. In this video, you will learn about two approaches used in the calculation of the slab mode: variational and reciprocity approaches.