1. In semiconductor optical amplifiers (SOAs), electron-hole recombination occurs.

2. 25 Exciton is electron - hole pair held together by their mutual Coulomb interaction.

3. Besprinkle diagram 分布图 Besprinkle acuteness 散射强度 dislocation Besprinkle 位错散射 electron hole Besprinkle 电子 short distance Besprinkle 近距散射 two-step Roman Besprinkle 二级喇曼散射