论文部分内容阅读
An averaged field approach is suggested for obtaining the band structure of a photonic crystal when the dimensionof the inclusions is much smaller compared with the longest period of the rectangular lattice of the photonic crystal.The method is illustrated for the H-polarization of the 2-dimensional case. The band structure is obtained inan explicit and simple way. The method is verified numerically by comparing with the conventional plane-waveexpansion method.