Accurate FDTD simulation of anisotropic media by subpixel smoothing
Author(s)
Oskooi, Ardavan; Kottke, Chris; Johnson, Steven G.
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Alternative title
Accurate finite-difference time-domain simulation of anisotropic media by subpixel smoothing
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Finite-difference time-domain (FDTD) methods suffer from reduced accuracy
when discretizing discontinuous materials. We previously showed that accuracy
can be significantly improved by using subpixel smoothing of the isotropic
dielectric function, but only if the smoothing scheme is properly designed.
Using recent developments in perturbation theory that were applied to spectral
methods, we extend this idea to anisotropic media and demonstrate that the
generalized smoothing consistently reduces the errors and even attains secondorder
convergence with resolution.
Date issued
2009-09Department
Massachusetts Institute of Technology. Center for Materials Science and Engineering; Massachusetts Institute of Technology. Department of MathematicsJournal
Optics Letters
Publisher
Optical Society of America
Citation
Ardavan F. Oskooi, Chris Kottke, and Steven G. Johnson, "Accurate finite-difference time-domain simulation of anisotropic media by subpixel smoothing," Opt. Lett. 34, 2778-2780 (2009)
Version: Author's final manuscript
ISSN
0146-9592