Modified FDTD Scheme for Space-Time Engineered-Modulation (STEM) Structures
Keywords:FDTD, Spatio-temporal modulation
Space-Time Engineered-Modulation (STEM) structures are currently experiencing massive interest in the metamaterials community, with the manipulation of the additional temporal dimension leading to novel effects and applications. However, there is presently no general numerical tool to simulate such structures. This paper closes this gap by providing a modified FDTD scheme solution, which involves hybrid -- auxiliary (non-physical) and physical -- numerical fields. It describes the corresponding modified Yee cell and derives the update equations. Moreover, it validates the proposed methods with the illustrative examples of a STEM slab and STEM crystal.
Copyright (c) 2023 Zoe-Lise Deck-Leger, Christophe Caloz
This work is licensed under a Creative Commons Attribution 4.0 International License.