absolute photonic band gap的用法和样例：
- A novel BWO with photonic band gap structure[J].
- Photonic crystals are a new kind of materials with photonic band gap.
- A novel photonic band gap (PBG) structure is presented in this paper.
- Our results demonstrate that lattices compounding can create broad complete photonic band gap.
- There are resonance modes in the photonic band gap when defects are introduced to the integrity photonic crystals.