In the reflected wave, the reflectivity of forbidden band lowers quickly with the extinction coefficient increment, when the extinction coefficient increases to 0.05, there is already no obvious photonic bandgap.

• 得出：在反射波中，禁带的反射率随消光系数的增加而迅速降低，当消光系数增加到0.；05时，已经不存在明显的能带。