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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Stephen A. Burns
  • Vol. 25, Iss. 5 — May. 1, 2008
  • pp: 1169–1173

Test of the FDTD accuracy in the analysis of the scattering resonances associated with high-Q whispering-gallery modes of a circular cylinder

Artem V. Boriskin, Svetlana V. Boriskina, Anthony Rolland, Ronan Sauleau, and Alexander I. Nosich  »View Author Affiliations

JOSA A, Vol. 25, Issue 5, pp. 1169-1173 (2008)

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Our objective is the assessment of the accuracy of a conventional finite-difference time-domain (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 accurately characterize 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 .

© 2008 Optical Society of America

OCIS Codes
(000.3860) General : Mathematical methods in physics
(000.4430) General : Numerical approximation and analysis
(220.0220) Optical design and fabrication : Optical design and fabrication
(230.5750) Optical devices : Resonators
(290.0290) Scattering : Scattering

ToC Category:
Optical Devices

Original Manuscript: February 4, 2008
Manuscript Accepted: March 13, 2008
Published: April 28, 2008

Artem V. Boriskin, Svetlana V. Boriskina, Anthony Rolland, Ronan Sauleau, and Alexander I. Nosich, "Test of the FDTD accuracy in the analysis of the scattering resonances associated with high-Q whispering-gallery modes of a circular cylinder," J. Opt. Soc. Am. A 25, 1169-1173 (2008)

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