Semi-Analytical Approach for Sensitivity Analysis with Lossy Dielectrics

We propose an extension of the adjoint variable method for design sensitivity analysis to problems involving lossy materials. We first extend a recently developed discrete algorithm, which was originally applied to loss-free problems. It requires the solution of a stepwise perturbed structure that is available only approximately. Then, we enhance this algorithm by proposing a semi-analytical approach. The approach requires the solution of the …