Title :
A stretched coordinate technique for numerical absorption of evanescent and propagating waves in planar waveguiding structures
Author :
Gribbons, Michael A. ; Pinello, William P. ; Cangellaris, Andreas C.
Author_Institution :
Dept. of Electr. & Comput. Eng., Arizona Univ., Tucson, AZ, USA
fDate :
12/1/1995 12:00:00 AM
Abstract :
Berenger´s PML technique is modified to allow for the absorption of evanescent and propagating waves in FDTD modeling of wave propagation in planar waveguiding structures. Analytic results illustrate the validity and capability of the proposed modification. Numerical studies explain the numerical implementation of the modified PML in the FDTD and in the compact 2D-FDTD algorithms. Guidelines for the proper selection of the various parameters that govern the performance of the modified PML are presented. The results from simulations indicate that the proposed modified PML grid truncation can be used efficiently for highly accurate numerical analysis of planar waveguiding structures
Keywords :
dispersion (wave); electromagnetic wave propagation; finite difference time-domain analysis; planar waveguides; waveguide theory; 2D-FDTD algorithms; Berenger´s PML technique; FDTD modeling; PML grid truncation; evanescent waves; numerical absorption; perfectly matched layer; planar waveguiding structures; propagating waves; stretched coordinate technique; Absorption; Analytical models; Computational modeling; Electromagnetic scattering; Finite difference methods; Guidelines; Maxwell equations; Optical scattering; Programmable logic arrays; Time domain analysis;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
