Birefringent dispersive FDTD subgridding scheme. Issue 17 (1st August 2016)

• Record Type: Journal Article
• Authors: De Deckere, B.; Van Londersele, A.; De Zutter, D.; Vande Ginste, D.
• Is Part Of: Electronics letters. Volume 52:Issue 17(2016)
• Page Start: 1455
• Page End: 1457
• Publication Date: 2016-08-01
• Subjects: finite difference time‐domain analysis -- matrix algebra -- birefringence -- dispersion relations; birefringent dispersive FDTD subgridding scheme -- Courant limit -- coarse grid -- update equation -- matrix equation -- finite‐difference time‐domain; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2016.1709
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : 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.