Accurate FDTD simulation of anisotropic media by subpixel smoothing
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 desi...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Optical Society of America
2009
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| Online Access: | http://hdl.handle.net/1721.1/49474 https://orcid.org/0000-0001-7327-4967 |
| Summary: | 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. |
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