Journal article · Preprint article
Squeezing of open boundaries by Maxwell-consistent real coordinate transformation
To emulate open boundaries within a finite computational domain, real-function coordinate transformation consistent with generally covariant Maxwell equations is proposed. The mapping-realized with arctangent function here-has a transparent geometric meaning of pure squeezing of coordinates, does not introduce artificially lossy layers (or "lossy coordinates") to absorb outgoing radiation, nor lead to spurious non-Maxwellian fields.
In finite-difference frequency-domain calculations on staggered grid, clear superiority over perfectly matched layers is demonstrated by the proposed technique, at a lower computation cost, in drastic elimination of parasitic coupling of guided modes to the boundaries of the computational window.
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2006 |
| Pages: | 576-578 |
| ISSN: | 15581764 and 15311309 |
| Types: | Journal article and Preprint article |
| DOI: | 10.1109/LMWC.2006.884768 |
Absorbing boundary conditions (ABCs) Anisotropic magnetoresistance Boundary conditions Electromagnetic scattering Finite difference methods Grid computing Maxwell equations Optical scattering Perfectly matched layers Reflectivity Time domain analysis absorbing boundary conditions arctangent function computational electromagnetics coordinate transformation coordinates squeezing electromagnetic wave absorption finite computational domain finite difference time-domain analysis finite-difference frequency-domain calculations lossy coordinates perfectly matched layer (PML) perfectly matched layers physics.comp-ph real-function coordinate transformation
