采用矢量平面波方法计算了由球形空气原子构成的体心立方结构和六角密堆结构的光子能带，两种结构下都看到了贯通整个布里渊区的禁带。本文预言周期性介电结构的最大折射率调制度和最大禁带宽度对应于同样的原子体积分数，而且这个最佳的原子体积分数是结构无关的。文中还计算了由各向异性介电小球构成的面心立方结构的光子能带并看到了禁带，这与各向同性介电小球构成的面心立方结构很不相同。

In this paper, the photonic bands of the body centered cubic and the hexagonal close packed structures consisting of spherical air atoms are calculated using vector plane wave method. The results show that complete band gaps (covering the entire Brillouin zone) open up for both structures. It is revealed that the maximum refractive index modulation coincides with the widest band gaps and the optimum volume fraction of the atoms is structure independent. The photonic bands of the face-centered-cubic (FCC) structure consisting of spherical anisotropic dielectric atoms are also calculated. The results show that a complete band gap opens up, which is quite different from the FCC structure consisting of spherical isotropic dielectric atoms.