Modeling 2D Gyromagnetic Photonic Crystals by Modified FDTD Method
LI Qing-Bo1,2, WU Rui-Xin1**, YANG Yan1, SUN Hui-Ling2
1Department of Electronic Sciences and Engineering, Nanjing University, Nanjing 210093 2School of Physics and Electronic Electrical Engineering, Huaiyin Normal University, Huai'an 223300
Abstract：The band structures of two-dimensional (2D) gyromagnetic photonic crystals (PCs) are analyzed by a modified finite difference time domain (FDTD) method. A special implementation is used to tackle the magnetic constitution equation. This method avoids the discretizing complexity in the time domain caused by nonlinear frequency dependence of anisotropy permeability tensor, and therefore keeps the fully explicit nature of the original FDTD method. Our implementation is proved by the band structure calculations using other methods and the transmission measurements of 2D gyromagnetic PC involving circular ferrite rods and square rods.
2013, Vol. 30 
