Physics – Optics
Scientific paper
2010-01-23
J. Opt. Soc. Am. A, vol. 25, no. 5, pp. 1169-1173, 2008
Physics
Optics
5 pages, 6 figures
Scientific paper
The objective of the paper is the assessment of the accuracy of a conventional FDTD code in the computation of the near and far-field scattering characteristics of a circular dielectric cylinder. We excite the cylinder with an electric or magnetic line current and demonstrate the failure of the two-dimensional FDTD algorithm to characterize accurately the emission rate and the field patterns near high-Q whispering-gallery-mode resonances. This is proven by comparison with the exact series solutions. The computational errors in the emission rate are then studied at the resonances still detectable with FDTD, i.e. having Q-factors up to 10^3.
Boriskin A. V.
Boriskina Svetlana V.
Nosich Alexander I.
Rolland A.
Sauleau R.
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