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- W3105702920 abstract "This paper introduces a new approach for the computation of electromagnetic field derivatives, up to any order, with respect to the material and geometric parameters of a given geometry, in a single Finite-Difference Time-Domain (FDTD) simulation. The proposed method is based on embedding the complex-step derivative (CSD) approximation into the standard FDTD update equations. Being finite-difference free, CSD provides accurate derivative approximations even for very small perturbations of the design parameters, unlike finite-difference approximations that are prone to subtractive cancellation errors. The availability of accurate approximations of field derivatives with respect to design parameters enables studies such as sensitivity analysis of multiple objective functions (as derivatives of those can be derived from field derivatives via the chain rule), uncertainty quantification, as well as multi-parametric modeling and optimization of electromagnetic structures. The theory, FDTD implementation and applications of this technique are presented." @default.
- W3105702920 created "2020-11-23" @default.
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- W3105702920 date "2019-06-01" @default.
- W3105702920 modified "2023-10-16" @default.
- W3105702920 title "Computation of High-Order Electromagnetic Field Sensitivities With FDTD and the Complex-Step Derivative Approximation" @default.
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- W3105702920 doi "https://doi.org/10.1109/tap.2019.2905693" @default.
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