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1·In fact, the seemingly anomalous dispersion of the impurity band in the first Brillouin zone is a result from band folding.

在第一布里渊区中出现的杂质带的反常色散实际上是能带折叠的结果。

2·After calculating the effective refractive index of the structure, we have verified that the impurity band has a normal dispersion.

通过计算结构的有效折射率，证实了杂质带色散是正常色散。

3·The results showed the absorption band produced by the imperfection, impurity and non diamond phase in films decreased the transmission of the films.

结果表明，膜中的缺陷、杂质和非金刚石相在透射谱中产生吸收带；

4·The characteristics of photonic forbidden band and impurity mode in doped one-dimensional photonic crystal were investigated by numeral simulated calculation with the method of characteristic matrix.

运用光在分层介质中传播的特征矩阵方法，通过数值计算，研究了掺杂一维光子晶体中光子禁带及杂质模的特性随不同偏振光及入射角的变化。