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Convolution PML (CPML): An efficient FDTD implementation of the CFS–PML for arbitrary media
Author(s) -
Roden J. Alan,
Gedney Stephen D.
Publication year - 2000
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/1098-2760(20001205)27:5<334::aid-mop14>3.0.co;2-a
Subject(s) - perfectly matched layer , finite difference time domain method , lossy compression , convolution (computer science) , microwave , nonlinear system , computer science , physics , mathematics , mathematical analysis , optics , telecommunications , quantum mechanics , artificial intelligence , machine learning , artificial neural network
A novel implementation of perfectly matched layer (PML) media is presented for the termination of FDTD lattices. The implementation is based on the stretched coordinate form of the PML, a recursive convolution, and the use of complex frequency, shifted (CFS) PML parameters. The method, referred to here as the convolutional PML (CPML), offers a number of advantages over the traditional implementations of the PML. Specifically, the application of the CPML is completely independent of the host medium. Thus, no modifications are necessary when applying it to inhomogeneous, lossy, anisotropic, dispersive, or nonlinear media. Secondly, it is shown that the CFS–PML is highly absorptive of evanescent modes and can provide significant memory savings when computing the wave interaction of elongated structures, sharp corners, or low‐frequency excitations. © 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 27: 334–339, 2000.