Preprint / Version 1

Modified FDTD Scheme for Space-Time Engineered-Modulation (STEM) Structures

##article.authors##

  • Zoe-Lise Deck-Leger Polytechnique Montreal
  • Christophe Caloz

DOI:

https://doi.org/10.31224/2868

Keywords:

FDTD, Spatio-temporal modulation

Abstract

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.

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Posted

2023-03-08