Christopher E. Reuter*1, Rose M. Joseph2, Eric T. Thiele4, Daniel S. Katz3, Allen Taflove2
1Rome Laboratory/ERST, 525 Brooks Road, Griffis AFB, NY 13441-4505
2Northwestern University, EECS Department, Evanston, IL 60208
3Cray Research, Inc., 222 N. Sepulveda Blvd., Ste. 1406,
El Segundo, CA 90245
4University of Colorado, ECE Department, Boulder, CO 80309
We describe a new termination for FD-TD models of metallic and dielectric guided-wave structures and multilayer structures employing the perfectly matched layer (PML) absorbing boundary condition (ABC) introduced by Berenger. The technique is accurate over a wide range of group velocities and requires no a priori knowledge of the propagating modes or dispersive properties of the structure.