We propose a two-dimensional (2D) annular photonic crystal (APC) with dual equi-frequency contours (EFCs) in one band. T......

光子晶体特殊的色散特性能导致负折射现象发生。用波束位移法对二维光子晶体平板的负折射现象进行理论计算和实验测量,得到了入射......