Frequency-Dependent LOD-FDTD Method in Cylindrical Coordinates

Jun SHIBAYAMA  Tatsuyuki HARA  Masato ITO  Junji YAMAUCHI  Hisamatsu NAKANO  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E101-C   No.8   pp.637-639
Publication Date: 2018/08/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E101.C.637
Type of Manuscript: BRIEF PAPER
Category: 
Keyword: 
Drude-Lorentz model,  fundamental scheme,  locally one-dimensional finite-difference time-domain (LOD-FDTD) method,  plasmonic devices,  trapezoidal recursive convolution,  

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Summary: 
The locally one-dimensional finite-difference time-domain (FDTD) method in cylindrical coordinates is extended to a frequency-dependent version. The fundamental scheme is utilized to perform matrix-operator-free formulations in the right-hand sides. For the analysis of surface plasmon polaritons propagating along a plasmonic grating, the computation time is significantly reduced to less than 10%, compared with the explicit cylindrical FDTD method.