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High-performance absorbing boundary conditions for photonic crystal waveguide simulations

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3 Author(s)
Koshiba, M. ; Dept. of Electron. & Inf. Eng., Hokkaido Univ., Sapporo, Japan ; Tsuji, Y. ; Sasaki, S.

A high-performance absorbing boundary condition is newly developed for the reduction of spurious reflections in photonic crystal (PC) waveguide simulations. The PC waveguide is terminated with a perfectly matched layer (PML) in which the original PC structure remains as is. This PC-based PML works well, compared to a conventional PML, which acts as a homogeneous absorbing medium, simulating a semi-infinite free space and to a distributed-Bragg-reflector waveguide, which was recently developed to reduce reflections from PC waveguide ends, improving a wavenumber matching condition for PC waveguide modes.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:11 ,  Issue: 4 )