Optimal absorbing boundary conditions
- 1 January 1995
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America A
- Vol. 12 (1) , 107-110
- https://doi.org/10.1364/josaa.12.000107
Abstract
We examine three simply implemented boundary conditions for finite-difference electric field propagation. We find that although so-called transparent boundary conditions are appropriate for highly collimated beams, properly tailored absorbers are generally better adapted to realistic field distributions. Our analysis incorporates a simple procedure for constructing nearly optimal absorber functions as well as a novel mixed transparent/absorbing boundary condition.Keywords
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