The photon crystal has the photonic band, and the photon band possibly has the photon band gap.

光子晶体是折射率（或介电常数）呈现周期性变化的、以具有光子带隙为特征的人造晶体材料。

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If it s in the first state, and it falls out of the conduction band, it will release its extra energy as a photon.

如果是在第一形态，并且它逃离出了传导带，他会以光子的形式释放多余的能量。

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The extra electron fills up the lower-energy state in the conduction band, causing excited electrons to, effectively, spill over into the higher-energy, photon-emitting state.

这个额外的电子填充了传导带的较低能级，有效的导致了被激发的电子溢入较高，释放光子的能级。

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