Open AccessBirefringent dispersive FDTD subgridding scheme
Author(s) -
De Deckere B.,
Van Londersele A.,
De Zutter D.,
Vande Ginste D.
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2016.1709
Subject(s) - finite difference time domain method , limit (mathematics) , dispersion (optics) , stability (learning theory) , mathematics , matrix (chemical analysis) , rank (graph theory) , grid , finite difference method , birefringence , mathematical analysis , algorithm , computer science , optics , geometry , materials science , physics , combinatorics , machine learning , composite material
A novel 2D finite difference time domain (FDTD) subgridding method is proposed, only subject to the Courant limit of the coarse grid. By making μ or ε inside the subgrid dispersive, unconditional stability is induced at the cost of a sparse, implicit set of update equations. By only adding dispersion along preferential directions, it is possible to dramatically reduce the rank of the matrix equation that needs to be solved.