点阵空位就是不完美性的一个简单例子。
本文分析了点阵空位的弹性模型，给出点阵空位与任意内应力系统的相互作用能量普遍表达式。
In this article, the elastic model of lattice vacancy is critically analysed, and a general expression for the interaction energy of vacancy with an arbitrary internal stress system is given.
可以通过以下方法来选择带隙的波长：排列周期性空位，使得其点阵常数等于带隙波长的一部分。
The bandgap wavelength can be chosen by arranging the periodic array of voids to have a lattice constant a fraction of the bandgap wavelength.
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