Accurate FDTD simulation of anisotropic media by subpixel smoothing
Author(s)Oskooi, Ardavan; Kottke, Chris; Johnson, Steven G.
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.
DepartmentMassachusetts Institute of Technology. Center for Materials Science and Engineering; Massachusetts Institute of Technology. Department of Mathematics
Optical Society of America
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)
Author's final manuscript