Journal article
Free-Space Squeezing Assists Perfectly Matched Layers in Simulations on a Tight Domain
To minimize computer memory consumption in the finite-difference modeling, one tends to place computational domain boundaries as close to the simulated object as possible. Unfortunately, this leads to inaccurate solution in the case when evanescent electromagnetic field is expected to spread far outside the object, as in simulations of eigenmodes or scattering at a wavelength comparable to or larger than the object itself.
Here, we show how, in addition to applying the perfectly matched layers (PMLs), outer free space can be squeezed to avoid cutting the evanescent field tails by the PMLs or computational domain borders. Adding the squeeze-transform layers to the standard PMLs requires no changes to the finite-difference algorithms.
Language: | English |
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Publisher: | IEEE |
Year: | 2010 |
Pages: | 389-392 |
ISBN: | 0203078926 , 0415644860 , 1136157824 , 9780203078921 , 9780415644860 and 9781136157820 |
ISSN: | 15485757 and 15361225 |
Types: | Journal article |
DOI: | 10.1109/LAWP.2010.2049250 |
ORCIDs: | Lavrinenko, Andrei |
Coordinate transformation finite-difference frequency-domain (FDFD) method perfectly matched layer (PML)
Computational modeling Computer simulation Conductivity DIFFERENCE TIME-DOMAIN EVANESCENT WAVES Electromagnetic fields Finite difference methods Frequency Gratings MEDIAEngineering Optical scattering Perfectly matched layers Photonics TRUNCATION Telecommunications computational domain boundaries computational electromagnetics computer memory consumption eigenmodes electromagnetic wave scattering evanescent electromagnetic field finite difference methods finite-difference frequency-domain (FDFD) method finite-difference modeling free-space squeezing perfectly matched layers scattering simulations squeeze-transform layers