Lumerical FEEM-Introduction

In this course, we will discuss the algorithm used in the Ansys Lumerical FEEM (Finite Element Eigen-Mode) solver to find the eigenmodes of a given structure and the properties of those modes. We will also explain the overlap and power coupling calculations, the feature to track modes as a function of frequency and how properties such as dispersion and group velocity are calculated. By the end of this section, you will be able to describe the algorithm used by the FEEM solver, know when the FEEM solver can be used, and understand the differences between the FEEM and the FDE (finite-difference eigenmode) solvers.

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