Self‐adjoint sensitivity analysis of lossy dielectric structures with electromagnetic time‐domain simulators

Abstract We present an efficient self‐adjoint approach for the computation of response derivatives in lossy inhomogeneous structures with time‐domain electromagnetic solvers. Our approach yields the responses and their derivatives with only one system analysis regardless of the number of optimizable parameters. The only requirement is to access the field solution at the perturbation grid points. The computation is performed as an independent …